Abstract

Disclosed in the present invention is a preparation method for an easy-turning beryllium copper alloy capable of resisting high-temperature softening and stress relaxation, comprising: Be: 0.2-2.1 wt.%; Te: 0.1-0.7 wt.%; Co+Ni>0.2 wt.%; Co+Ni+Fe<0.7 wt.%; the sum of impurity elements≤4 wt.%; and the balance being Cu. The preparation method is: a. preparing materials according to the weight percentage, feeding, smelting, and carrying out spray deposition to obtain an ingot blank; b. sequentially carrying out uniform heat treatment, hot working process, cold working process, annealing, solid solution treatment and aging heat treatment on the ingot blank obtained in step a to obtain the beryllium copper alloy. The high-temperature softening temperature point of the beryllium copper alloy of the present invention increases by 75°C±10°C compared with that of a traditional high-beryllium copper alloy, and increases by 90°C±10°C compared with that of a traditional low-beryllium copper alloy, and anti-stress relaxation performance of said beryllium copper alloy increases by 30% compared with that of a traditional beryllium copper alloy material, thereby expanding an application working condition range of a beryllium copper material.

IPC Classes  ?

• C22C 9/00 - Alloys based on copper
• C22C 9/06 - Alloys based on copper with nickel or cobalt as the next major constituent
• C22C 1/03 - Making non-ferrous alloys by melting using master alloys
• B22D 11/06 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
• B22D 11/18 - Controlling or regulating processes or operations for pouring
• C22F 1/08 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
• C21D 1/26 - Methods of annealing

Abstract

A tellurium-beryllium-copper alloy, comprising 0.2-2.1 wt.% of Be, 0.1-0.7 wt.% of Te, and a total of ≤ 4 wt.% of Co, Ni, Ti, rare earth elements and impurities, the balance being Cu. The preparation method comprises: a. proportioning, feeding, smelting and casting according to the weight percentages to obtain an ingot blank; b. sequentially carrying out a homogenizing heat treatment, heat working process, cold working process, annealing, solid dissolving and aging heat treatment on the ingot blank obtained in step a to obtain the tellurium-beryllium-copper alloy. By adding tellurium to a beryllium-copper alloy, tellurium can form Cu2Te with the copper matrix. The tellurium-beryllium-copper alloy has good high temperature stability and retains the excellent properties of physical mechanics and corrosion resistance of beryllium-copper, and greatly improves the cutting performance of the materials while protecting the environment, and can also achieve good plasticity.

IPC Classes  ?

• C22C 9/00 - Alloys based on copper

Abstract

A method for preparing a high beryllium-copper alloy for a photomultiplier tube dynode, the method comprising the steps of: material preparation, smelting, furnace chamber cleaning, strip manufacturing and finish rolling. The high-purity beryllium-copper intermediate alloy is matched with high-purity copper, and the mass percentage of each ingredient is: 2.3 wt.%-2.6 wt.% of beryllium, not more than 0.31 wt.% of nickel, not more than 0.058 wt.% of iron, not more than 0.013 wt.% of aluminum, not more than 0.028 wt.% of silicon, not more than 0.0020 wt.% of lead, not more than 0.0020 wt.% of cadmium, not more than 0.0020 wt.% of zinc, not more than 0.43 wt.% of other impurity elements, and the balance Cu.

IPC Classes  ?

• C22C 9/00 - Alloys based on copper
• C22C 1/03 - Making non-ferrous alloys by melting using master alloys
• B22D 11/06 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
• H01J 43/10 - Dynodes