The present disclosure relates to a heat treatment method and a heat treatment furnace that enable characteristics on an equal level to those when bluing processing is performed to be obtained without the bluing processing being performed in stress-relief annealing of a motor core. A heat treatment method according to one aspect is a heat treatment method in stress-relief annealing of a motor core. The heat treatment method includes an annealing step of annealing the motor core by using an exothermic converted gas as a furnace atmospheric gas, and a cooling step of cooling the motor core obtained in the annealing step, by using an exothermic converted gas as a furnace atmospheric gas, in a temperature range from a temperature in the annealing step to 500° C. at a cooling rate exceeding 600° C. per hour.
Provided is a heat treatment furnace used to anneal a workpiece to be heat-treated, including a heating chamber configured to heat the workpiece, a first cooling chamber and a second cooling chamber configured to cool the workpiece having passed through the heating chamber, and an atmosphere gas supply device configured to supply, as an in-furnace atmosphere gas, an exothermic converted gas to each of the first cooling chamber and the second cooling chamber, the first cooling chamber having a first cooling state of cooling the workpiece by using a first coolant and a second cooling state of cooling the workpiece by using not the first coolant but a second coolant different from the first coolant, and the second cooling chamber having a similar configuration to the first cooling chamber.
Provided is a heat treatment furnace used to anneal a workpiece to be heat-treated, including a heating chamber configured to heat the workpiece, a first cooling chamber configured to cool the workpiece having passed through the heating chamber, a second cooling chamber that is located on a downstream side of the first cooling chamber in a conveying direction of the workpiece and that is configured to cool the workpiece having passed through the first cooling chamber, and an atmosphere gas supply device configured to supply, as an in-furnace atmosphere gas, an exothermic converted gas to each of the first cooling chamber and the second cooling chamber, the atmosphere gas supply device selectively supplying a first gas that is an exothermic converted gas and a second gas that is an exothermic converted gas and that has a dew point lower than a dew point of the first gas.
H02K 15/12 - Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
C21D 1/18 - HardeningQuenching with or without subsequent tempering
C21D 1/74 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
F27B 9/12 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
F27D 9/00 - Cooling of furnaces or of charges therein
In the present disclosure, a motor core can be degreased prior to straightening annealing without a heating device or a vacuum device dedicated to degreasing being provided. A heat treatment furnace according to an embodiment of the present disclosure includes a degreasing chamber for degreasing a motor core, a heating chamber with which the degreasing chamber directly communicates and which is configured to anneal the motor core that has passed through the degreasing chamber, by using a converted gas generated by a converted gas generation device, as an in-furnace atmosphere gas, and a gas flow formation section GF configured in such a manner that the converted gas in the heating chamber flows toward the degreasing chamber.
The present disclosure is aimed at providing a heat treatment furnace and a heat treatment method that have sufficient performance in terms of the atmosphere gas in the heat treatment furnace and that can reduce the amount of carbon-based gas emissions. A heat treatment furnace according to one aspect of the present disclosure performs heat treatment by heating an object to be heat treated and is provided with an atmosphere gas supply device that generates a converted gas by reacting a hydrocarbon gas and nitrogen gas containing 1-15 vol% of oxygen gas as a combustion-supporting gas for the hydrocarbon gas and supplies the converted gas as an atmosphere gas into the heat treatment furnace.
The present disclosure provides a configuration by which a motor core can be degreased prior to stress-relief annealing without the provision of a heating device or a vacuum device dedicated for degreasing. A heat treatment furnace according to an embodiment of the present disclosure comprises: a degreasing chamber 14 for degreasing a motor core; a heating chamber 19 with which the degreasing chamber directly communicates and which is configured to anneal the motor core passed through the degreasing chamber by using a converted gas generated by a converted gas generation device as an in-furnace atmosphere gas; and a gas flow formation part GF configured in such a manner that the converted gas in the heating chamber flows toward the degreasing chamber.
C21D 1/74 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
C21D 1/76 - Adjusting the composition of the atmosphere
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
The present disclosure provides a configuration by which a motor core can be degreased prior to stress-relief annealing without the provision of a heating device or a vacuum device dedicated for degreasing. A heat treatment furnace according to an embodiment of the present disclosure comprises: a degreasing chamber 14 for degreasing a motor core; a heating chamber 19 with which the degreasing chamber directly communicates and which is configured to anneal the motor core passed through the degreasing chamber by using a converted gas generated by a converted gas generation device as an in-furnace atmosphere gas; and a gas flow formation part GF configured in such a manner that the converted gas in the heating chamber flows toward the degreasing chamber.
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
C21D 1/74 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
C21D 1/76 - Adjusting the composition of the atmosphere
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
8.
HEAT TREATMENT FURNACE, INFORMATION PROCESSING APPARATUS AND INFORMATION PROCESSING METHOD
An object of the present disclosure is to make it possible to allow an operator or the like to grasp a carbon potential value of an atmosphere in a heat treatment furnace more simply. A heat treatment furnace (10) according to one aspect of the present disclosure includes a carbon potential value deriving section configured to derive a carbon potential value of an atmosphere in a heat treatment chamber on a basis of output of a gas sensor, and output of a temperature sensor, and a first display section configured to display the derived carbon potential value (P1) on a graph D that is displayed in a first display area (41A), and has a first axis representing carbon potential values, and a second axis representing temperatures and crossing the first axis.
The present disclosure relates to a heat treatment method and a heat treatment furnace that enable characteristics on an equal level to those when bluing processing is performed to be obtained without the bluing processing being performed in stress-relief annealing of a motor core. A heat treatment method according to one aspect is a heat treatment method in stress-relief annealing of a motor core. The heat treatment method includes an annealing step of annealing the motor core by using an exothermic converted gas as a furnace atmospheric gas, and a cooling step of cooling the motor core obtained in the annealing step, by using an exothermic converted gas as a furnace atmospheric gas, in a temperature range from a temperature in the annealing step to 500° C. at a cooling rate exceeding 600° C. per hour.
The present disclosure pertains to a heat treatment method and a heat treatment furnace with which it is possible, in stress relieving annealing, to obtain characteristics of an equivalent level to a case in which a bluing treatment is applied, without carrying out a bluing treatment. The heat treatment method according to an embodiment is a method for performing a heat treatment in stress relieving annealing of a motor core, the heat treatment method including: an annealing step for annealing the motor core using a heat-generating metamorphic gas as an in-furnace atmosphere gas; and a cooling step for cooling the motor core obtained in the annealing step at a cooling speed exceeding 600°C per hour, in a temperature range of from the temperature in the annealing step to 500°C, using a heat-generating metamorphic gas as an in-furnace atmosphere gas.
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
F27B 9/02 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity of multiple-track typeFurnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity of multiple-chamber typeCombinations of furnaces
F27B 9/04 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
F27B 9/12 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
The present disclosure relates to a heat treatment method and a heat treatment furnace that enable characteristics on an equal level to those when bluing processing is performed to be obtained without the bluing processing being performed in stress-relief annealing of a motor core. A heat treatment method according to one aspect is a heat treatment method in stress-relief annealing of a motor core. The heat treatment method includes an annealing step of annealing the motor core by using an exothermic converted gas as a furnace atmospheric gas, and a cooling step of cooling the motor core obtained in the annealing step, by using an exothermic converted gas as a furnace atmospheric gas, in a temperature range from a temperature in the annealing step to 500 C at a cooling rate exceeding 600 C per hour.
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
12.
HEAT TREATMENT FURNACE, CONTROL METHOD FOR SAME, INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM
The purpose of this disclosure is to allow an operator or the like to more easily comprehend a carbon potential value of the atmosphere in a heat treatment furnace. A heat treatment furnace (10) according to an embodiment of the present disclosure is provided with: a carbon potential value derivation unit that derives a carbon potential value of the atmosphere of a heat treatment chamber on the basis of the output of a gas sensor and the output of a temperature sensor; and a first display unit configured such that, in a first display region (41A) that displays a graph D with a first axis for indicating carbon potential values and a second axis for indicating temperatures, the second axis intersecting the first axis, a derived carbon potential value (P1) is shown on the graph D.
The purpose of the present invention is to provide a heat treatment furnace for quenching that makes it possible to forgo the used of a converted gas and suitably prevent the appearance of a modified layer resulting from decarburization or the like in the surface of a treated object such as steel. A heat treatment furnace (10) according to one embodiment of the present invention is provided with: a gas supply unit (26) configured so as to supply a neutral gas or an inactive gas to a quenching heating chamber (12); and an internal structure such as a muffle (34) in the quenching heating chamber that is at least partially made from a graphite-based material.
F27B 9/04 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
F27B 9/06 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and chargeFurnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity electrically heated
Provided are a heat treatment method, a heat treatment device, and a heat treatment system, with which a heat treatment such as brightness treatment for a material being processed can be controlled precisely, efficiently, easily, and safely. In the present invention a heat treatment furnace has a heat treatment chamber, which performs heat treatment on a material being processed, and the furnace-internal structures of which are manufactured from graphite. The sensor information from various sensors is referenced to calculate ΔG° (the standard Gibbs energy of formation), and the state of the heat treatment furnace during operation is expressed with an Ellingham diagram, a management range, and ΔG°, and is displayed on a display device (331). In addition, the flow volume or the flow speed of a neutral gas or an inert gas used as an atmospheric gas is controlled by means of a control unit (334) such that ΔG° is within the management range.
F27B 9/24 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatmentFurnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor
F27D 7/06 - Forming or maintaining special atmospheres or vacuum within heating chambers
17.
METHOD FOR HEAT TREATMENT AND HEAT TREATMENT APPARATUS, AND HEAT TREATMENT SYSTEM
Provided are a method for heat treatment and a heat treatment apparatus, and a heat treatment system, for calculating ΔG0 (standard generation Gibbs energy) with reference to sensor information from sensors, and displaying the state of a heat treatment oven during operation on a display device (531), the state being expressed in an Ellingham diagram and in terms of a management range and ΔG0; the method, apparatus, and system are also capable of effectively controlling, with high precision, heat treatment, such as brightness treatment or the like, such that ΔG0 is within the management range, by controlling the flow amount of hydrocarbon gas using a control unit (534), without occurrence of oxidation or decarburization.
Provided are: a method for brazing an aluminum alloy, which is characterized in that brazing is carried out by heating an aluminum brazing sheet without using flux in a furnace that is in an argon gas-containing atmosphere, said aluminum brazing sheet comprising a core material that is composed of aluminum or an aluminum alloy and a brazing filler material that is composed of an aluminum alloy and clad on one surface or both surfaces of the core material, and said core material and/or said brazing filler material containing Mg; and a brazing apparatus which is used in the method for brazing an aluminum alloy. The brazing method has good and stable brazing properties and is applicable in industrial practice.
G01N 21/67 - Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence using electric arcs or discharges
F28F 21/08 - Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
This invention aims to propose a heating system utilizing the microwave improved to manufacture the high quality fibers such as carbon fiber and graphitic fiber with a simplified construction and simultaneously to meet a demand for saving of the electric energy.This heating system includes microwave supplying means adapted to supply the heating furnace main body with microwave power, filtering zones respectively provided in the vicinity of an inlet 11a at one side of the heating furnace main body and in the vicinity of an outlet 11b at the other side of the heating furnace main body to prevent leak of the microwave power, a heating oven formed of microwave heat generating material in the form of an oblong hollow body so as to extend linearly between the inlet and the outlet of the heating furnace main body and heat insulator having low microwave absorption ability adapted to separate off a space defined between an inner surface of the heating furnace main body and an outer surface of the heating oven from a space within the heating oven and adapted also to hold the heating oven wherein a work or works is or are supplied through the into the heating oven and discharged from the outlet to heat the work or works within the heating oven.
Provided are: a method for brazing an aluminum alloy, which is characterized in that brazing is carried out by heating an aluminum brazing sheet without using flux in a furnace that is in an argon gas-containing atmosphere, said aluminum brazing sheet comprising a core material that is composed of aluminum or an aluminum alloy and a brazing filler material that is composed of an aluminum alloy and clad on one surface or both surfaces of the core material, and said core material and/or said brazing filler material containing Mg; and a brazing apparatus which is used in the method for brazing an aluminum alloy. The brazing method has good and stable brazing properties and is applicable in industrial practice.
B23K 1/19 - Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
B23K 1/00 - Soldering, e.g. brazing, or unsoldering
B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
G01N 21/67 - Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence using electric arcs or discharges
