Abstract

The invention provides a nickel-free and cobalt-free, rust-proof austenitic steel, which meets the requirements, necessary in dentistry, concerning its corrosion resistance, its thermal expansion coefficient, its mechanical properties and its castability. For this purpose, the steel consists of, in % by mass, C: >0.2-0.8%, N: 0.3-1.3%, Si: ≤2.0%, Mn: 14-30%, Cr: 17-27%, Mo: 0-6%, W: 0-6%, Nb: 0-6%, Ga: 0-6%, Ta 0-6%, the remainder being iron and unavoidable impurities. The content of impurities complies with the stipulations in DIN EN ISO 22674:2016-09 for dental materials. The steel composed has an austenitic structure, an offset yield strength Rp0.2 of at least 230 MPa, a percent elongation A of more than 5%, and a modulus of elasticity of at least 150 GPa.

IPC Classes  ?

• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/00 - Ferrous alloys, e.g. steel alloys

Abstract

The invention relates to a steel material which allows for components to be formed with low residual stress via additive manufacturing without pre- or post-heating. The steel material consists of a steel with the following composition, in wt. %: C: 0.28-0.65%, Co: <10.0, Cr: 3.5-12.5%, optionally Mo: 0.5-12.5%, wherein the sum of the content of Cr and Mo is 4-16%, the Ni equivalent Ni_eq calculated according to the formula Ni_eq [%]=30% C+% Ni+0.5% Mn from the C-content % C, the Ni-content % Ni, the Mn-content % Mn fulfills the condition (1) 10%≤Ni eq≤20%, and alongside C, optionally respectively up to 9% Mn and up to 4.5% Ni are provided to fulfill condition (1), wherein the Cr equivalent Cr_eq calculated according to the formula Cr_eq [mass]=% Cr+% Mo+1.5% S+0.5% Nb+2% XX from the CR-content Cr %, the Mo-content Mo %, the Si-content Si %, the Nb-content % Nb and the sum % XX of the contents of at least one element of the group “Sc, Y, Ti, Zr, Hf, V, Ta” fulfills the condition (2) 4% Cr_eq 16%, and optionally respectively up to 2% Si, up to 2% Nb or at least one element from the group “Sc, Y, Ti, Zr, Hf, V, Ta” are provided to fulfill condition (2), wherein the total proportion of elements of this group is at most equal to the mass fraction of 2%, which Ti must not exceed if Ti is the only element selected from the group consisting of “Sc, Y, Ti, Zr, Hf, V, Ta”, and wherein the rest of the steel consists of Fe and <0.5% impurities, including 0.025% P and 50.025% S. The steel material is suited, in particular as a powder, for LPBF or LMD methods and as wire for the WAAM method.

IPC Classes  ?

• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• B23K 26/342 - Build-up welding
• B23K 9/04 - Welding for other purposes than joining, e.g. built-up welding
• B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

The invention relates to a metal powder intended for use in an additive manufacturing process, which consists of steel particles having an average diameter of 5-150 μm and consisting of, in mass %, C: 0.15-1.0%, N: 0.15-1.0%, Si, 0.1-2.0%, Mn: 10-25%, Cr: 5-21%, Mo: 0.1-3.0%, Ni: ≤5%, remainder of iron and unavoidable impurities. The metal powder has a flow rate determined in accordance with DIN EN ISO 4490 of less than 30 sec/50 g. Using a metal powder according to the invention, reliable high-load-bearing components can be produced by additive manufacturing. Accordingly, a metal powder according to the invention is particularly suitable for the manufacture of machine elements that are exposed to high loads and of medical components that are used in or on the human or animal body. The invention also provides a method which reliably allows components with optimised mechanical properties to be manufactured from metal powder according to the invention on the basis of an additive manufacturing process.

IPC Classes  ?

• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• B22F 10/64 - Treatment of workpieces or articles after build-up by thermal means
• B22F 10/66 - Treatment of workpieces or articles after build-up by mechanical means
• B22F 9/08 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• B33Y 40/20 - Post-treatment, e.g. curing, coating or polishing
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 70/00 - Materials specially adapted for additive manufacturing

Abstract

The invention provides a nickel-free and cobalt-free, rust-proof austenitic steel, which meets the requirements, necessary in dentistry, concerning its corrosion resistance, its thermal expansion coefficient, its mechanical properties and its castability. For this purpose, the steel according to the invention consists of, in % by mass: C: > 0.2-0.8%, N: 0.3-1.3%, Si: < 2.0%, Mn: 14-30%, Cr: 17-27%, Mo: 0-6%, W: 0-6%, Nb: 0-6%, Ga: 0-6%, Ta 0-6%, the remainder being iron and unavoidable impurities, wherein the content of impurities complies with the stipulations in DIN EN ISO 22674:2016-09 for dental materials. The steel composed according to the invention has an austenitic structure, an offset yield strength Rp0.2 of at least 230 MPa, a percent elongation A of more than 5%, and a modulus of elasticity of at least 150 GPa.

IPC Classes  ?

• A61K 6/844 - Noble metals
• C22C 1/02 - Making non-ferrous alloys by melting
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
• C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese

Abstract

The invention relates to a powder for use in a powder metallurgy or additive method which enables the creation of a steel material which is optimized in respect of the hardness and wear resistance thereof, to a correspondingly created steel material and to a method by means of which components can be reliably created, wherein the hardness and wear resistance of said components fulfill the highest requirements. To this end, a powder according to the invention contains steel particles of a steel which is composed, in mass %, of C: < 0.5%, Si: < 2.0%, Mn: < 2.0%, Cr: < 1.0%, Mo: 0.25-12%, Ni: 8-30%, optionally Co: 8-18%, optionally Cu: 0.5-5.0%, Nb: 0.05-5.0%, optionally Al: 0.05-9.75%, optionally Ti: 0.05-9.75%, with the proviso that the total of the content of Nb and, if present, Al and Ti equals 0.15% to 10%, wherein Ti, if present, is present together with Al, the remainder being iron and unavoidable impurities, which include < 0.05% P, < 0.05% S, < 0.1% N, < 0.05% B and < 0.5% O and, if Co is not present in contents of at least 8%, < 0.5% Co and, if Cu is not present in contents of at least 0.5%, < 0.5% Cu, and optionally additionally particles of at least one hard material present as a carbide, nitride, carbonitride, boride or oxide, which are mixed with the steel particles and account for 5-50 vol.% of the total volume of the powder. A steel material produced from such powder has a hardness of at least 40 HRC in the precipitation-hardened state but can be worked easily in the solution-annealed state.

IPC Classes  ?

• B22F 3/24 - After-treatment of workpieces or articles
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 6/02 - Hardening by precipitation
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper

Abstract

The invention relates to a steel material which allows for components to be formed with low residual stress via additive manufacturing without pre- or post-heating. The steel material consists of a steel with the following composition, in wt.%: C: 0.28 - 0.65 %, Co: < 10.0, Cr: 3.5 - 12.5 %, optionally Mo: 0.5 - 12.5 %, wherein the sum of the content of Cr and Mo is 4 - 16 %, the Ni equivalent Ni_eq calculated according to the formula Ni_eq [%] = 30 %C + %Ni + 0.5 %Mn from the C-content %C, the Ni-content %Ni, the Mn-content %Mn fulfills the condition (1) 10 % ≤ Ni eq ≤ 20 %, and alongside C, optionally respectively up to 9% Mn and up to 4.5% Ni are provided to fulfill condition (1), wherein the Cr equivalent Cr_eq calculated according to the formula Cr_eq [mass] = %Cr + %Mo + 1.5 %S + 0.5 %Nb + 2 %XX from the CR-content Cr%, the Mo-content Mo%, the Si-content Si%, the Nb-content %Nb and the sum %XX of the contents of at least one element of the group "Sc, Y, Ti, Zr, Hf, V, Ta" fulfills the condition (2) 4 % ≤ Cr_eq ≤ 16 %, and optionally respectively up to 2% Si, up to 2% Nb or at least one element from the group "Sc, Y, Ti, Zr, Hf, V, Ta" are provided to fulfill condition (2), wherein the total proportion of elements of this group is at most equal to the mass fraction of 2%, which Ti must not exceed if Ti is the only element selected from the group consisting of "Sc, Y, Ti, Zr, Hf, V, Ta", and wherein the rest of the steel consists of Fe and < 0.5 % impurities, including ≤ 0.025 % P and 50.025% S. The steel material is suited, in particular as a powder, for LPBF or LMD methods and as wire for the WAAM method.

IPC Classes  ?

• B22F 10/20 - Direct sintering or melting
• B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
• B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
• C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
• C22C 38/30 - Ferrous alloys, e.g. steel alloys containing chromium with cobalt
• C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt

Abstract

The invention relates to a metal powder intended for use in an additive manufacturing process, which powder consists of steel particles which have an average diameter of 5 - 150 pm and consist of, in percent by weight, C: 0.15 - 1.0 %, N: 0.15 - 1.0 %, Si: 0.1 - 2.0 %, Mn: 10 - 25 %, Cr: 5 - 21 %, Mo: 0.1 - 3.0 %, Ni: < 5 %, remainder iron and unavoidable impurities, the metal powder having a flow rate determined in accordance with ISO 4490 of less than 30 sec/50 g. Reliable, highly loadable components can be produced by additive manufacture using a metal powder according to the invention. Accordingly, a metal powder according to the invention is particularly suited for the production of machine parts which are subject to high loads and of medical components which are used in or on the human or animal body. The invention also provides a method which reliably permits the production of components with optimized mechanical properties from the metal powder according to the invention on the basis of an additive manufacturing process.

IPC Classes  ?

• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
• B22F 3/24 - After-treatment of workpieces or articles
• B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
• B22F 9/08 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 40/20 - Post-treatment, e.g. curing, coating or polishing
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
• C22C 33/02 - Making ferrous alloys by powder metallurgy

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Abstract

According to the invention, a steel, which is characterized by high hardness and strength together with good corrosion resistance, consists of the following in mass percent: C: < 0.02%, Si: < 2.0%, Mn: < 2.0%, Cr: 14.0-18.0%, Ni: 3.0-6.0%, Cu: 2.0-4.0%, optionally Co: < 6.0%, Nb: 1.0-5.0%, optionally W: 0.45-5.0%, the sum of the concentrations of Nb and W being at least 1.0% and at most 5%, optionally Mo: 0.25-6.0%, optionally Al: 0.25-6.0%, optionally Ti: 0.25-6.0%, the sum of the concentrations of Al and Ti, if they are present, being 0.25-6.0%, P: < 0.035%, S: < 0.035%, the remainder iron and unavoidable impurities. The invention further relates to a method for producing a component, said method being based on a steel of this type, to a component produced from the steel according to the invention and to advantageous uses of the steel.

IPC Classes  ?

• C21D 1/28 - Normalising
• C21D 6/00 - Heat treatment of ferrous alloys
• C21D 6/02 - Hardening by precipitation
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing
• C21D 1/25 - Hardening, combined with annealing between 300 °C and 600 °C, i.e. heat refining ("Vergüten")
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
• B22F 3/15 - Hot isostatic pressing

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal. Metal treating.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal. Metal treating.

Abstract

The invention provides a method for producing components with a hardness of 5 - 45 HRC by using additive manufacturing methods. For this purpose, a steel alloy powder is prepared from particles consisting of, in % by mass, at least one element from the group "C, N", of which either 0.5 - 5.0% C or 0.5 - 5.0% N or 0.5 - 6.0% C and N are present, in each case optionally at least one element from the group "Si, Mn" in amounts of respectively 0.1 - 2.5%, and as carbide or nitride formers at least one element from the group "Cr, Mo, V, Ti, Nb, W" in amounts of Cr: 5 - 25%, Mo: 0.5 - 15%, V: 0.5 - 15%, Ti: 0.5 - 5%, Nb: 0.5 - 15%, or W: 0.5 - 15 %, the remainder Fe and unavoidable impurities. An additive manufacturing method in which powder particles of the steel alloy powder that are adjacent to one another are bonded together to form a steel matrix is used to form from the steel alloy powder a component in which, after cooling down to room temperature, 25% by volume of the steel matrix consists of austenite. The component is then thermally treated in such a way that 80% by volume of the steel matrix of its structure is made up of a martensitic structure and the remainder of other structural constituents and in the steel matrix there are hard phase particles that are formed from the steel of the steel alloy powder and amount to 5 - 50% by volume of the total volume of the component. The thermal treatment is carried out according to a variant I as tempering, in which the component is heated through at 400 - 700°C and/or according to a variant II as complete freezing of the component down to a temperature of < -50 °C. The invention also refers to a component of a corresponding composition and nature.

IPC Classes  ?

• B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
• B33Y 80/00 - Products made by additive manufacturing
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C22C 38/36 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
• B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
• B22F 3/24 - After-treatment of workpieces or articles
• C21D 1/30 - Stress-relieving
• C21D 6/00 - Heat treatment of ferrous alloys
• C22C 1/05 - Mixtures of metal powder with non-metallic powder
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C21D 6/04 - Hardening by cooling below 0° C
• C21D 1/18 - HardeningQuenching with or without subsequent tempering
• C21D 1/26 - Methods of annealing
• C21D 6/02 - Hardening by precipitation
• C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor

Abstract

The invention proposes the use of a steel powder for producing components by means of an additive manufacturing process in which the steel powder is solidified by means of selective heat input in order to model the component to be produced, said steel powder consisting of (in wt.%): C: 0 - 0.1%, Si: ≤ 1.5%, Mn: 9 - 15.0%, Mo: 0.01 - 3.0%, N: 0.004 - 0.020%, S: ≤ 0.40%, AI: 0.004 - 10.0%, B: < 0.0025%, Nb: ≤ 0.25%, Ti: ≤ 1.8%, V: ≤ 1.0%, Cu: ≤ 2.0%, Cr: ≤ 5.0%, and at least one element from the group "Ni, Mn", with the remainder consisting of iron and unavoidable impurities resulting from the production process, wherein, for the contents of Ni and Mn present alternatively or in combination with one another, the Ni content is 0.5 - 4.0% and the Mn content present alternatively or simultaneously is 9.0 - 15.0%, and wherein, for the value "Z" formed according to the formula: Z = 5 * %Ni + %Cr + 5 * %Mo from the particular Mo content %Mo, the present Ni content %Ni and/or the present Cr content %Cr of the steel powder, Z < 35 wt.%. The steel powder used according to the invention can be alloyed cost-effectively and is distinguished in that the components manufactured from it have a low tendency to form stress cracks. The invention also proposes a method that utilises a steel powder of this kind and that enables reliable production of components by application of an additive manufacturing process.

IPC Classes  ?

• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
• B22F 3/24 - After-treatment of workpieces or articles
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• B33Y 80/00 - Products made by additive manufacturing
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• B33Y 10/00 - Processes of additive manufacturing
• B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting

Abstract

The invention relates to the use of a steel powder consisting, in percent by weight, of C: 0 - 0.1 %, Si: ≤ 1.5 %, Mn: 0.05 - 4.0 %, Mo: 0.01 - 3.0 %, N: 0.004 - 0.020 %, S: ≤ 0.40 %, AI: 4.0 - 10.0 %, B: < 0.0025 %, Nb: ≤ 0.25 %, Ti: 0.5 - 1.8 %, V: ≤ 1.0 %, Cu: ≤ 2.0 %, Cr: ≤ 5.0 %, and optionally Ni to a content of 0.5 - 4.0 %, with the remainder being iron and unavoidable impurities inherent in the production process, where, for the value for Z formed in accordance with the formula Z = 5 * %Ni + %Cr + 5 * %Mo from the particular Mo content %Mo, the Ni content %Ni and/or the Cr content %Cr each present in the steel powder, Z < 35. Said steel powder is used for the production of components by an additive manufacturing method in which the steel powder is hardened by means of selective heat application to form the component to be produced. The steel powder used in accordance with the invention is alloyable at low cost and is characterized by the components produced using said powder having a low tendency to stress cracking. The invention also relates to a method using a steel powder of this nature which permits reliable production of components by the use of an additive manufacturing method and provides a component produced from the steel powder suggested for use in accordance with the invention.

IPC Classes  ?

• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
• B22F 3/24 - After-treatment of workpieces or articles
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• B33Y 80/00 - Products made by additive manufacturing
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• B33Y 10/00 - Processes of additive manufacturing
• B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting

Goods & Services

Crude and semi-wrought common metals, in particular steel, stainless steel and bright steel; half-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Abstract

The invention shows possibilities which allow simplified production of implants or prostheses, specifically of dental implants or prostheses, by applying subtractive processes. For this purpose, the invention proposes the use of a precipitation-hardening or solid-solution-strengthening, biocompatible cobalt-based alloy for the production of blanks. Such blanks are provided in the soft state. Subsequently, each component (implant or prosthesis) is produced from the soft blank by means of material-removing machining. Subsequently, a heat-treatment of the implant or prosthesis then takes place to adjust the hardness thereof by means of precipitation hardening or solid-solution formation.

IPC Classes  ?

• C22C 19/07 - Alloys based on nickel or cobalt based on cobalt
• A61L 27/04 - Metals or alloys
• C22F 1/10 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/20 - Methods or devices for soldering, casting, moulding or melting

Abstract

The invention relates to a cobalt-based composite material that offers an optimized combination of properties for the production of components that, in practical use, are subject to high thermal stresses of typically more than 400°C in conjunction with high corrosive and abrasive stresses. For this purpose, the composite material of the invention has been produced by powder metallurgy and has a matrix having the following composition (in % by weight): C: 0.2-3.0%, Si: ឬ 1.5%, Mn: ឬ 1.5%, Cr: 27.0-32.0%, Ni: ឬ 2.0%, Fe: ឬ 2.0%, at least one element from the group "Mo, W" with the proviso that Mo: ≤ 6.0%, W: ≤ 14.0%, where Mo ≥ 4.0% when W ឬ 0.5% and W ≥ 4.0% when Mo ឬ 0.5%, the balance being cobalt and unavoidable impurities. According to the invention, hard substance particles have been embedded in the matrix in contents of 2.5-30% by weight. For production of components from the material of the invention, a cobalt alloy powder of a composition as per the alloy envisaged by the invention for the matrix is provided. This cobalt alloy powder is mixed with hard substance particles such that the content of hard substance particles in the cobalt alloy powder/hard substance particle mixture obtained is 2.5% to 30% by weight. A solid semifinished product is formed from the cobalt alloy powder/hard substance particle mixture by a sintering method or an additive method. Subsequently, the semifinished product obtained is processed to give the finished component.

IPC Classes  ?

• C22C 1/04 - Making non-ferrous alloys by powder metallurgy
• C22C 19/07 - Alloys based on nickel or cobalt based on cobalt
• C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ

Abstract

A method for simply producing components suitable for use under high loads and risks of wear and which have a core portion which consists of a metal material and a wear-resistant layer on a peripheral surface of the core portion is disclosed. A core portion blank is provided and consists of the metal material whose dimension in a first spatial direction is greater than the desired finished dimension of the core and whose second dimension is smaller than the desired finished dimension is provided. A material that forms a wear-resistant layer in the component is applied to a peripheral surface of the core portion blank. The composite body is shaped to form the component. The component may then be optionally finished.

IPC Classes  ?

• B21J 5/00 - Methods for forging, hammering, or pressingSpecial equipment or accessories therefor
• B21B 27/03 - Sleeved rolls
• B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
• B22F 3/15 - Hot isostatic pressing
• B22F 3/17 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor by forging
• B23K 10/02 - Plasma welding
• B21K 1/06 - Making machine elements axles or shafts
• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• B21K 5/00 - Making tools or tool parts, e.g. pliers
• B21K 1/12 - Making machine elements axles or shafts of specially-shaped cross-section
• B29C 48/505 - Screws
• B21K 1/10 - Making machine elements axles or shafts of cylindrical form
• B23K 101/06 - Tubes
• B23K 103/04 - Steel alloys
• B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
• B22F 3/24 - After-treatment of workpieces or articles
• B29C 48/03 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired formApparatus therefor characterised by the shape of the extruded material at extrusion

Goods & Services

Crude and semi-wrought common metals, in particular steel, stainless steel and bright steel; half-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Abstract

The invention relates to a steel material which offers an optimized combination of properties for producing components, which are exposed to high mechanical, corrosive, thermal and abrasive loads when in use. The claimed powder metallurgy produced steel material is produced and comprises the following (in wt. %): C: 3.9 - 5.0 %, Si: 0.3 - 2.0 %, Mn: 0.3 - 2.0 %, P: 0 - ឬ0.035 %, S: 0 - ឬ0.35 %, N: 0 - ឬ0.12 %, Cr: 11.0 - 15.0 %, Mo: 0.5 - 2.0 %, V: 13.5 - 16.5 %, respectively optionally one or several elements from the group "Nb, Ni, Co, W”, wherein the content of the elements “Ni, Co and W” is at the most 1.0 % and content of Nb is at the most 2.0 %, the remainder being iron and unavoidable impurities, wherein in the thus composed steel matrix, up to 30 wt. % hard material particles can be present. A solid semi-finished product is formed from a steel alloy powder of said type according to a sintering method or an additive method, said product being thermally treated and then being processed to form the respective component

IPC Classes  ?

• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• B21B 27/02 - Shape or construction of rolls
• B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
• B22F 3/15 - Hot isostatic pressing

Abstract

The invention relates to a steel material which has a minimized density, a good wear resistance and thus a high service life with maximized resistance to extreme changes in temperature and an also optimized corrosion resistance. The claimed material is suitable, in particular for producing components which are exposed to high mechanical, corrosive, thermal and abrasive loads are exposed when in use. The claimed powder metallurgy produced steel material is produced and comprises the following (in wt. %): C: 1.5 - 5.0 %, Si: 0.3 - 2.0 %, Mn: 0.3 - 2.0 %, P: 0 - ឬ0.035 %, S: 0 - ឬ0.35 %, N: 0 - ឬ0.1 %, Cr: 3.0 - 15.0 %, Mo: 0.5 - 2.0 %, V: 6.0 - 18.0 %, respectively optionally an element or several elements from the group "Nb, Ni, Co, W", wherein the content of Ni, Co and W is at the most 1.0 % and the content of Nb is at the most 2.0 %, the remainder being iron and unavoidable impurities. Hard material particles added separately to the steel matrix are embedded in a content of between 2.5 - 30 wt. %. A solid semi-finished product is formed from a steel alloy powder of said type according to a sintering method or an additive method, said product being thermally treated and then being processed to form the respective component.

IPC Classes  ?

• C22C 33/02 - Making ferrous alloys by powder metallurgy
• B21B 27/02 - Shape or construction of rolls
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium

Goods & Services

Crude and semi-wrought common metals, in particular steel, stainless steel and bright steel; half-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Abstract

The invention relates to an iron-based reduced-density material, the mechanical properties of which make said material suitable for a broad range of applications, in particular in the automotive industry. For this purpose, the steel has a density of less than 7.25 kg/dm3 according to the invention and consists of (in wt%) C: up to 0.20%, Si: 0.1 - 3.50%, Mn: 0.1 - 3.50%, N: up to 0.020%, S: up to 0.40%, P: up to 0.009%, Al: 6.0 - 25.0%, Ti: 0.55 - 10.0%, Cr: up to 6.0%, Mo: up to 3.0%, Ni: up to 4.0%, V: up to 1.0%, W: up to 1.0%, Cu: up to 4%, B: up to 0.08%, Nb: up to 1.5%, the remainder iron and unavoidable production-related impurities. The microstructure of the steel has more than 85 vol% ferrite and up to 10 vol% austenite and, as the remainder, contents of intermetallic phases and fractions of carbide, nitride, bainite, or pearlite.

IPC Classes  ?

• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
• C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
• C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
• C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
• C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
• C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
• C22C 38/40 - Ferrous alloys, e.g. steel alloys containing chromium with nickel
• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

The invention demonstrates the possibilities permitting a simplified production of implants or prosthetics, in particular dental implants or prosthetics, using subtractive methods. For this purpose, the invention relates to the use of a bio-compatible cobalt base alloy, for precipitation hardening or solidifying via mixed crystal formation, for the production of blanks. Blanks of this type are provided in a soft state in the course of the method according to the invention. Subsequently, the respective component (implant or prosthetic) is produced from the soft blank via material-removing machining. Finally, a heat treatment of the implant or prosthetic is then carried out in order to set the hardness thereof via precipitation hardening or mixed crystal formation.

IPC Classes  ?

• A61L 27/04 - Metals or alloys

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Steel; stainless steel; bright steel; semi-finished products in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of steel, stainless steel and bright steel.

Abstract

The invention provides a steel, which has a high strength, without complex heat treatment processes having to be performed for this purpose, and at the same time has a low tendency to warp. For this purpose, the high-grade structural steel according to the invention consists of (in % by weight) up to 0.25% C, up to 0.45% Si, 0.20 - 2.00% Mn; up to 4.00% Cr, 0.6 - 3.0% Mo, 0.004 - 0.020% N, up to 0.40% S, 0.001 - 0.035% Al, 0.0005 - 0.0025% B, up to 0.015% Nb, up to 0.01% Ti, up to 0.10% V, up to 1.5% Ni and up to 2.0% Cu, the remainder iron and unavoidable impurities, wherein the Al content %Al, the Nb content %Nb, the Ti content %Ti, the V content %V and the N content %N of the high-grade structural steel respectively meet the following condition: %Al/27 + %Nb/45 + %Ti/48 + %V/25 > %N/3.75. The high-grade structural steel according to the invention has a yield strength of at least 750 MPa, a tensile strength of at least 950 MPa and a microstructure which consists at least 80% by volume of bainite and in total at most 20% by volume of residual austenite, ferrite, pearlite and/or martensite. On account of its combination of properties, the steel according to the invention is suitable in particular for the production of forged parts with great changes in cross section over its length. The invention also discloses a method for producing such forged components.

IPC Classes  ?

• C21D 1/02 - Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
• C21D 1/20 - Isothermal quenching, e.g. bainitic hardening
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese

Goods & Services

Steel, stainless steel and bright steel; semi-finished products in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of steel, stainless steel and bright steel.

Goods & Services

Steel, stainless steel and bright steel; semi-finished products in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of steel, stainless steel and bright steel.

Abstract

A method for producing components (1, 21) which have a core section (6, 22) made of a metal material and a wear-resistant layer (7, 24) on a circumferential surface of the core section. According to the invention, a) a core section blank (8, 28) made of the metal material is provided, the dimension (L8, L28) of which in a first spatial direction (Y) is greater than the nominal finished dimension of the core section of the component in the spatial direction in question and the dimension of which in a second spatial direction (X) is less than the nominal finished dimension of the core section of the component in this second spatial direction; b) a material (M, P) forming the wear-resistant layer is applied to the circumferential surface such that the material and the core section blank form a solid composite body (13, 34); and c) the composite body is formed into the component by being stretched in the direction of the second spatial direction and compressed in the direction of the first spatial direction, until its dimensions in the spatial directions correspond at least to the nominal finished dimensions of the component in these spatial directions and the wear-resistant material is present on a circumferential surface of the component.

IPC Classes  ?

• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• B21B 27/03 - Sleeved rolls
• B21J 5/00 - Methods for forging, hammering, or pressingSpecial equipment or accessories therefor
• B21K 1/06 - Making machine elements axles or shafts
• B21K 5/00 - Making tools or tool parts, e.g. pliers
• B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder

Goods & Services

Unwrought and partly common metals, Hard metals and hard metal alloys, Hard metals.

Abstract

The invention relates to steel for applications which require high wear resistance, a high degree of hardness, good corrosion resistance and/or low thermal conductivity, said steel being reliably producible on an industrial scale. The hardness of the steel according to the invention in the hardened state is at least 56 HRC. In order to obtain said steel, the microstructure of the steel in total contains at least 30 wt.-% hard phases, which, in addition to the TiC particles, consist of further carbide particles, oxide particles or nitride particles. The TiC particle content of the steel according to the invention is at least 20 wt.-%. The hard phase particles are embedded in a matrix that consists of (in wt.-%) 9.0 - 15.0% Cr, 5.0 - 9.0% Mo, 3.0 - 7.0% Ni, 6.0 - 11.0% Co, 0.3 - 1.5% Cu, 0.1 - 2.0% Ti, and 0.1 - 2.0% Al, the remainder being iron and inevitable impurities. The combination of properties makes said steel particularly suitable for the production of structural components, in particular blades or perforated plates which are required for the production and the recycling of plastics.

IPC Classes  ?

• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt

Goods & Services

Crude and semi-wrought common metals and their alloys, in particular steel, stainless steel and bright steel; semi-finished goods of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

(1) Crude and semi-wrought common metals and their alloys, in particular steel, stainless steel and bright steel; semi-finished goods of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal, namely, metal auxiliary welding rods, metal auxiliary welding electrodes.

Goods & Services

Crude and semi-wrought common metals and their alloys, in particular steel, stainless steel and bright steel; Semi-finished goods of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; Auxiliary welding materials of metal.

Goods & Services

Semi-finished products of steel in the form of wire, rods, plates, sheets, billets, blocks, profiles, rings; unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

(1) Semi-finished products of steel in the form of wire, rods, plates, sheets, billets, blocks, profiles, rings; unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel.

Goods & Services

(1) Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal, excluding paints, primers and clear coats for use on civil and military airplanes and aerospace carriers.

Goods & Services

Crude and semi-wrought common metals and their alloys, in particular steel, stainless steel and bright steel; semi-finished goods of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

Unwrought and semi-wrought common metals, in particular steel, stainless steel and bright steel; semi-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal.

Goods & Services

(1) Crude and semi-wrought common metals, namely steel, stainless steel and bright steel; half-finished products of steel, namely rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal, namely welding wires, welding bands and welding rods; excluding the manufacturing of same for wires used in the manufacturing of wire netting, wire mesh, sifting screens, sieves and filters for sifting, filtering and sieving the rock, sable, gravel, minerals, products for composting or composted products, products for recycling or recycled products, top soil, mulch.

Goods & Services

(1) Crude and semi-wrought common metals, namely steel, stainless steel and bright steel; half-finished products of steel, namely rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal, namely welding wires, welding bands and welding rods.

Goods & Services

(1) Crude and semi-wrought common metals, namely steel, stainless steel and bright steel; half-finished products of steel, namely rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal, namely welding wires, welding bands and welding rods.

Goods & Services

(1) Crude and semi-wrought common metals, namely steel, stainless steel and bright steel; half-finished products of steel, namely rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal, namely welding wires, welding bands and welding rods.

Goods & Services

(1) Crude and semi-wrought common metals, namely steel, stainless steel and bright steel; half-finished products of steel, namely rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal, namely welding wires, welding bands and welding rods.

Goods & Services

(1) Crude and semi-wrought common metals, namely steel, stainless steel and bright steel; half-finished products of steel, namely rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal, namely welding wires, welding bands and welding rods.

Goods & Services

(1) Crude and semi-wrought common metals, namely steel, stainless steel and bright steel; half-finished products of steel in the form of rods, plates, sheets, billets, blocks, wire, wire profiles, rings; auxilliary welding materials of metal, namely welding wires, welding bands and welding rods.

Goods & Services

(1) Crude and semi-wrought common metals, namely steel, stainless steel and bright steel; half-finished products of steel, namely rods, plates, sheets, billets, blocks, wire, profiles, rings; auxiliary welding materials of metal, namely welding wires, welding bands and welding rods.

Goods & Services

Rough and partially processed common metals and their alloys in the form of blocks, slabs, forgings, shapes and building blocks, forged parts, plates, billets, rods, wire, pipes, sheets and strips.

Goods & Services

(1) Rough and partially processed common metals and their alloys in the form of blocks, slabs, forgings, shapes and building blocks, forged parts, plates, billets, rods, wire, pipes, sheets and strips, all the aforesaid products as steels for plastic mouldings in the form of pre- and half fabricates for manufacturing of plastic parts.

Goods & Services

Worked and semi-worked common metals and metal alloys in the form of blocks, iron slabs, shaped parts and components, smith hammer forgings, sheet bars, billets, rods, wires, pipes, sheets and bands, all the aforesaid goods being plastic mould steel, being prefabricated and semi-finished goods for manufacturing plastic parts.

Goods & Services

Common metals and their alloys, steels, stainless steels, high-grade steels and acid resistant steels; semi-finished products made of the aforesaid alloys and steels, like sheets, rods, billets, wires, tubes, springs.

Goods & Services

Common metals and their alloys, steels, specially tool steels, non-rusting steels, speciality steels and acid resisting steels; semi-finished products made of the aforementioned metals, alloys and steels, eg sheets, poles, bars, wires, pipes, springs.

Goods & Services

Common metals, hard metals and alloys with sintered carbides, all partly containing titanium carbide.

Goods & Services

Métaux communs et leurs alliages.

Goods & Services

Non-precious, unprocessed or semi-processed metals, namely, non-magnetic steel alloys for building vehicles, machines, motors and engines (excluding rods, welding powders and pastes).

Goods & Services

Métaux communs bruts et mi-ouvrés et leurs alliages sous forme de lingots, de blocs laminés, ou de blocs forgés, de brames, de billettes, de disques, de barres, de tubes, de tôles, de rubans, de fils, de plaques et de pièces profilées, frittées et poreuses; alliages durs sous forme de lingots usinés ou partiellement usinés; matériaux métalliques de remplissage par soudage sous forme de rubans, de barres, de fils et de poudres; poudres métalliques, aussi celles contenant des métaux durs, pour la projection. Outillages de machine pour le façonnage par enlèvement ou sans enlèvement de copeaux, y compris outillages comportant des métaux durs, spécialement matrices, outillages de découpage, de tournage, de fraisage, de pressage, de d'étirage; outillages de précision pour machine pour le coupage fin, pour le moulage sous pression et pour l'injection de matières synthétiques; filtres en métaux communs frittés et poreux; alliages durs sous forme de pièces de machines. Calibres de mesurage; aimants, systèmes d'aimant se composant d'aimants permanents, de pièces ferro-magnétiques (fer doux) et non ferro-magnétiques. Plaques et filtres en matières synthétiques frittées et poreuses comme parties de filtres à liquides et de filtres à gaz, aussi comme parties d'installations chimiques de la technique de procédé; filtres en métaux communs frittés et poreux. Plaques et filtres en matières synthétiques frittées et poreuses comme parties de filtres à liquides et de filtres à gaz pour véhicules; alliages durs sous forme de pièces de moteurs de véhicules.

Abstract

The invention provides a steel, which has a high strength, without complex heat treatment processes having to be performed for this purpose, and at the same time has a low tendency to warp. For this purpose, the high-grade structural steel according to the invention consists of (in % by weight) up to 0.25% C, up to 0.45% Si, 0.20 - 2.00% Mn; up to 4.00% Cr, 0.6 - 3.0% Mo, 0.004 - 0.020% N, up to 0.40% S, 0.001 - 0.035% Al, 0.0005 - 0.0025% B, up to 0.015% Nb, up to 0.01% Ti, up to 0.10% V, up to 1.5% Ni and up to 2.0% Cu, the remainder iron and unavoidable impurities, wherein the Al content %Al, the Nb content %Nb, the Ti content %Ti, the V content %V and the N content %N of the high-grade structural steel respectively meet the following condition: %Al/27 + %Nb/45 + %Ti/48 + %V/25 > %N/3.75. The high-grade structural steel according to the invention has a yield strength of at least 750 MPa, a tensile strength of at least 950 MPa and a microstructure which consists at least 80% by volume of bainite and in total at most 20% by volume of residual austenite, ferrite, pearlite and/or martensite. On account of its combination of properties, the steel according to the invention is suitable in particular for the production of forged parts with great changes in cross section over its length. The invention also discloses a method for producing such forged components.

IPC Classes  ?

• C21D 1/02 - Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
• C21D 1/20 - Isothermal quenching, e.g. bainitic hardening
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese

Abstract

The invention relates to a metal powder intended for use in an additive manufacturing process, which powder consists of steel particles which have an average diameter of 5 - 150 pm and consist of, in percent by weight, C: 0.15 - 1.0 %, N: 0.15 - 1.0 %, Si: 0.1 - 2.0 %, Mn: 10 - 25 %, Cr: 5 - 21 %, Mo: 0.1 - 3.0 %, Ni: < 5 %, remainder iron and unavoidable impurities, the metal powder having a flow rate determined in accordance with ISO 4490 of less than 30 sec/50 g. Reliable, highly loadable components can be produced by additive manufacture using a metal powder according to the invention. Accordingly, a metal powder according to the invention is particularly suited for the production of machine parts which are subject to high loads and of medical components which are used in or on the human or animal body. The invention also provides a method which reliably permits the production of components with optimized mechanical properties from the metal powder according to the invention on the basis of an additive manufacturing process.

IPC Classes  ?

• B22F 1/052 - Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
• B22F 9/08 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
• B22F 10/00 - Additive manufacturing of workpieces or articles from metallic powder
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese