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Low-beryllium elastic copper alloy and preparation and manufacture method thereof

An elastic copper alloy and elastic alloy technology, applied in the field of non-ferrous metal processing, can solve problems affecting safety, reliability, and stress relaxation of alloy materials, so as to reduce production difficulty, improve stress relaxation resistance, and excellent stress relaxation resistance Effect

Inactive Publication Date: 2012-09-19
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the current use process, there is a phenomenon of severe stress relaxation of the alloy material, and the stress relaxation rate of some materials can reach more than 80% under harsh conditions, which seriously affects the safety and reliability of use.

Method used

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  • Low-beryllium elastic copper alloy and preparation and manufacture method thereof
  • Low-beryllium elastic copper alloy and preparation and manufacture method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The alloy of the invention is smelted using the following raw materials: electrolytic copper, pure nickel, pure beryllium, copper-chromium master alloy and copper-zirconium master alloy. The composition of the alloy is shown in Example 1 of Table 1.

[0027] 1. Melting: use non-vacuum induction furnace for melting. The order of adding the alloy is: electrolytic copper, pure nickel, raise the temperature to 1250 ℃, after the melt is completely melted, add covering agent (charcoal) and keep it warm for 5 minutes, add pure beryllium, keep it warm for 3 minutes, then add copper chromium and copper zirconium in the middle After fully degassing and removing impurities, the alloy is covered with burning charcoal about 10mm thick. After heat preservation for 10 minutes, fully stir, stand still for 10 minutes, and then cast out of the furnace at a casting temperature of 1150°C.

[0028] 2. Face milling: Milling the alloy, milling 1mm on the upper and lower surfaces.

[0029] ...

Embodiment 2

[0036] The alloy of the present invention adopts the following raw materials for smelting: electrolytic copper, pure nickel, pure beryllium, copper chromium and copper zirconium master alloy. The composition of the alloy is shown in Example 2 of Table 1.

[0037] 1. Melting: use non-vacuum induction furnace for melting. The order of adding the alloy is: electrolytic copper, pure nickel, raise the temperature to 1300 ℃, after the melt is completely melted, add covering agent (charcoal) and keep it warm for 10 minutes, add pure beryllium, keep it warm for 3 minutes, then add copper chromium and copper zirconium in the middle After fully degassing and removing impurities, the alloy is covered with burning charcoal about 10mm thick. After 10 minutes of heat preservation, fully stir, stand still for 5 minutes, and then cast out of the furnace. The casting temperature is 1200°C.

[0038] 2. Face milling: Milling the alloy, milling 1mm on the upper and lower surfaces.

[0039] 3. ...

Embodiment 3

[0046] The alloy of the present invention adopts the following raw materials for smelting: electrolytic copper, pure nickel, pure beryllium, copper chromium and copper zirconium master alloy. The composition of the alloy is shown in Example 3 of Table 1.

[0047]1. Melting: use non-vacuum induction furnace for melting. The order of adding the alloy is: electrolytic copper, pure nickel, raise the temperature to 1260 ℃, after the melt is completely melted, add covering agent (charcoal) and keep it for 8 minutes, add pure beryllium, keep it for 3 minutes, then add copper chromium and copper zirconium in the middle After fully degassing and removing impurities, the alloy is covered with burning charcoal about 10mm thick. After 10 minutes of heat preservation, fully stir, stand still for 7 minutes, and then cast out of the furnace. The casting temperature is 1170°C.

[0048] 2. Face milling: Milling the alloy, milling 1mm on the upper and lower surfaces.

[0049] 3. Hot rolling:...

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Abstract

The invention relates to low-beryllium elastic copper alloy and a preparation and manufacture method thereof. The low-beryllium elastic copper alloy comprises by mass: 0.2-0.4% of Be, 1.3-2.6 % of Ni and the balance Cu, wherein the mass ratio of the Ni to the Be in the beryllium copper alloy is larger than or equal to 5.5 and smaller than or equal to 6.5. The alloy can further contain Cr and Zr. The preparation method of the low-beryllium elastic copper alloy comprises alloy component design, casting, hot rolling, solution treatment, rolling deformation and ageing treatment. The alloy is low in Be content (smaller than 0.5%) and can effectively save metal beryllium, the tensile strength of the alloy after deformation ageing treatment can reach 968MPa, conductivity is larger than 55% according to the international annealed copper standard (IACS), and the rate of resistance to stress relaxation is larger than 85%. Therefore, the low-beryllium elastic copper alloy can serve as a conductive elastic material which has high elasticity, high strength and excellent resistance to stress relaxation, can be applied to electrical contact components, connectors, relays and the like, and has wide application prospects.

Description

technical field [0001] The invention relates to a low-beryllium elastic copper alloy and a preparation and processing method thereof. The product can replace the existing beryllium-copper alloy material and is used for manufacturing automobiles, electronic connectors, elastic components, etc., and belongs to the field of non-ferrous metal processing. Background technique [0002] Beryllium bronze has high elasticity, strength, and excellent thermal conductivity, electrical conductivity, corrosion resistance, wear resistance, fatigue resistance and other excellent properties, and is widely used in the manufacture of electronics, electrical, communications, instruments, meters, telecommunications, light industry, machinery , chemical and coal industry elastic components. [0003] However, in the current use process, there is a phenomenon of serious stress relaxation of the alloy material, and some materials have a stress relaxation rate of more than 80% under harsh conditions,...

Claims

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Application Information

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IPC IPC(8): C22C9/06C22C1/02C22F1/08
Inventor 黄国杰彭丽军王建立程磊郑国辉解浩峰洪松柏肖翔鹏马吉苗苑和峰
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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