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High-elasticity stress relaxation-resistant beryllium-copper alloy and its preparation and processing method

A technology of beryllium copper alloy and processing method, applied in the field of high elastic stress relaxation resistance beryllium copper alloy and its preparation and processing, can solve the problems affecting safety, reliability, stress relaxation of alloy materials, etc., and achieve high fatigue resistance, resistance to The effect of good heat and good electrical conductivity

Inactive Publication Date: 2013-01-30
有研科技集团有限公司
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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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  • High-elasticity stress relaxation-resistant beryllium-copper alloy and its preparation and processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The alloy of the present invention is smelted using the following raw materials: electrolytic copper, pure nickel, cobalt and beryllium. The composition of the alloy is shown in Example 1 of Table 1.

[0028] 1. Melting: use non-vacuum induction furnace for melting. The order of adding the alloy is: first add Cu, after melting, then add Ni and Be, add covering agent (charcoal) and keep warm for 5-10min, after fully degassing and removing impurities, then cover with burning charcoal about 10mm thick. Finally add the cobalt powder. The smelting temperature is 1250°C. After holding the heat for 10 minutes, let it stand for 5-10 minutes and then cast it out of the furnace. The casting temperature is 1200°C.

[0029] 2. Face milling: face milling of the alloy (1mm milling on the upper and lower surfaces).

[0030] 3. Hot rolling: the alloy is heated, the heating temperature is 900°C, the holding time is 1h, and the total processing rate of hot rolling is 70%.

[0031] 4....

Embodiment 2

[0038] The alloy of the present invention is smelted using the following raw materials: electrolytic copper, pure nickel, cobalt and beryllium. The composition of the alloy is shown in Example 2 of Table 1.

[0039] 1. Melting: use non-vacuum induction furnace for melting. The order of adding the alloy is: first add Cu, after melting, then add Ni and Be, add covering agent (charcoal) and keep warm for 5-10min, after fully degassing and removing impurities, then cover with burning charcoal about 10mm thick. Finally add the cobalt powder. The smelting temperature is 1200°C. After holding the heat for 10 minutes, let it stand for 5-10 minutes and then cast it out of the furnace. The casting temperature is 1150°C.

[0040] 2. Face milling: face milling of the alloy (1mm milling on the upper and lower surfaces).

[0041] 3. Hot rolling: the alloy is heated, the heating temperature is 930°C, the holding time is 1.5h, and the total processing rate of hot rolling is 70%.

[0042] ...

Embodiment 3

[0049] The alloy of the present invention is smelted using the following raw materials: electrolytic copper, pure nickel, cobalt and beryllium. The composition of the alloy is shown in Example 3 of Table 1.

[0050] 1. Melting: use non-vacuum induction furnace for melting. The order of adding the alloy is: first add Cu, after melting, then add Ni and Be, add covering agent (charcoal) and keep warm for 5-10min, after fully degassing and removing impurities, then cover with burning charcoal about 10mm thick. Finally add the cobalt powder. The smelting temperature is 1250°C. After holding the heat for 10 minutes, let it stand for 5-10 minutes and then cast it out of the furnace. The casting temperature is 1200°C.

[0051] 2. Face milling: face milling of the alloy (1mm milling on the upper and lower surfaces).

[0052] 3. Hot rolling: the alloy is heated, the heating temperature is 920°C, the holding time is 1h, and the total processing rate of hot rolling is 70%.

[0053] 4....

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Abstract

The invention relates to a high-elasticity stress relaxation-resistant beryllium-copper alloy and its preparation and processing method. The alloy comprises the following basic components by mass: 0.2-0.7% of Be, 0.5-2.0% of Co, 0.2-2.0% of Ni, and the balance Cu. The components of the copper alloy need to satisfy that: (a) the total content of Ni and Co is greater than or equal to 0.7% and less than or equal to 4%; and (b) the ratio of the sum of Ni and Co to Be is greater than or equal to 2 and less than or equal to 7. The preparation and processing method consists of: a. batching according to the mass percentage, charging, smelting and casting; b. surface milling; c. hot rolling; d. solid solution treatment; e. first cold rolling; f. first aging; g. second cold rolling; and h. second aging. The copper alloy provided in the invention has tensile strength sigmaB of 600-800MPa, plastic elongation delta of 4-10%, and electric conductivity of 35-50%IACS, and can be widely used in various elastic reeds, electrical contacts, spot welding poles, explosion-proof tools, electrical contact components, plug-in components and other occasions.

Description

technical field [0001] The invention relates to a highly elastic stress-relaxation-resistant beryllium copper alloy and a preparation and processing method thereof, belonging to the field of nonferrous metal processing. Background technique [0002] Beryllium copper has high elasticity, strength, and excellent thermal conductivity, electrical conductivity, corrosion resistance, wear resistance, and fatigue resistance. The elastic hysteresis, elastic aftereffect, and elastic incompleteness of elastic elements made of beryllium copper are relatively low It is an important elastic copper alloy material with the best comprehensive performance. In particular, the characteristics of fatigue resistance and no sparks during impact are unmatched by other conductive elastic materials, and can be called the "ace card" of conductive elastic materials. Therefore, it is widely used to manufacture elastic components in electronics, electricity, communications, instruments, meters, telecom...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02C22F1/08
Inventor 肖翔鹏程磊黄国杰米绪军
Owner 有研科技集团有限公司
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