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High-strength, high-electric-conductivity and high-stress relaxation-resistance copper alloy elastic material and preparation method thereof

A stress relaxation, elastic material technology, applied in high strength, high stress relaxation resistance copper alloy elastic material and its preparation, high conductivity field, can solve the problem of difficult to meet the use requirements of automotive high current relays and connectors, low conductivity and so on

Active Publication Date: 2017-05-10
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Developed the CuNiSi series alloy of high content in recent years, as CN101333610B said alloy has high strength (≥1000MPa) and good stress relaxation resistance, but conductivity is low, no more than 30%IACS, it is difficult to meet the needs of automotive high-current relays and Connector usage requirements

Method used

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  • High-strength, high-electric-conductivity and high-stress relaxation-resistance copper alloy elastic material and preparation method thereof
  • High-strength, high-electric-conductivity and high-stress relaxation-resistance copper alloy elastic material and preparation method thereof

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Embodiment 1

[0030] The alloy of the invention adopts the following raw materials for smelting: electrolytic copper, electrolytic nickel, electrolytic cobalt, pure silicon, pure silver, Cu-5wt%Cr, Cu-10wt%Zr and Cu-B master alloy. The composition of the alloy is shown in Example 1 of Table 1.

[0031] 1. Melting: Add electrolytic copper, electrolytic nickel, electrolytic cobalt, pure silicon, pure silver, Cu-5wt%Cr, Cu-10wt%Zr and Cu-B master alloy into the boron oxide crucible, raise the temperature to 1250℃, After the electrolytic copper is melted, vacuumize, the vacuum degree is less than 0.1Pa, and then nitrogen gas is introduced. After the melt is completely melted, it is evenly stirred and then cast. The casting temperature is 1150°C.

[0032] 2. Homogenization heat treatment: The alloy is subjected to homogenization heat treatment at a temperature of 920°C, the holding time is 8 hours, and the cooling method is water cooling.

[0033] 3. Hot rolling: the alloy is heated at 850°C, t...

Embodiment 2

[0041] The alloy of the invention adopts the following raw materials for smelting: electrolytic copper, electrolytic nickel, electrolytic cobalt, pure silicon, pure silver, Cu-5wt%Cr, Cu-10wt%Zr and Cu-B master alloy. The composition of the alloy is shown in Example 2 of Table 1.

[0042] 1. Melting: Add electrolytic copper, electrolytic nickel, electrolytic cobalt, pure silicon, pure silver, Cu-5wt%Cr, Cu-10wt%Zr and Cu-B master alloy into the boron oxide crucible, raise the temperature to 1270℃, After the electrolytic copper and copper are melted, vacuumize, the vacuum degree is less than 0.1Pa, and then nitrogen gas is introduced. After the melt is completely melted, it is evenly stirred and then cast. The casting temperature is 1170°C.

[0043] 2. Homogenization heat treatment: The alloy is subjected to homogenization heat treatment at a temperature of 940°C, the holding time is 10h, and the cooling method is water cooling.

[0044] 3. Hot rolling: the alloy is heated at ...

Embodiment 3

[0052] The alloy of the invention adopts the following raw materials for smelting: electrolytic copper, electrolytic nickel, electrolytic cobalt, pure silicon, pure silver, Cu-5wt%Cr, Cu-10wt%Zr and Cu-B master alloy. The composition of the alloy is shown in Example 3 of Table 1.

[0053] 1. Melting: Add electrolytic copper, electrolytic nickel, electrolytic cobalt, pure silicon, pure silver, Cu-5wt%Cr, Cu-10wt%Zr and Cu-B master alloy into the boron oxide crucible, raise the temperature to 1300℃, After the electrolytic copper and copper are melted, vacuumize, the vacuum degree is less than 0.1Pa, and then nitrogen gas is introduced. After the melt is completely melted, it is evenly stirred and then cast. The casting temperature is 1200°C.

[0054] 2. Homogenization heat treatment: The alloy is subjected to homogenization heat treatment at a temperature of 960°C, the holding time is 8 hours, and the cooling method is water cooling.

[0055] 3. Hot rolling: the alloy is heated...

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Abstract

The invention relates to a high-strength, high-electric-conductivity and high-stress relaxation-resistance copper alloy elastic material and a preparation method thereof, and belongs to the field of machining of nonferrous metal. The material comprises the following components in percentage by weight: 1.8-3.0% of Co, 2.3-3.6% of Ni, 1.0-1.5% of Si, 0.05-0.1% of Cr, 0.01-0.05% of Ag, 0.02-0.05% of Zr, 0.02-0.05% of B, and the balance of Cu, wherein the mass ratio of Ni / Co is 1.2-2; and the mass sum of Ag, Zr and B is 0.05-0.1%. The material is prepared through smelting, casting, uniform heat treatment, hot rolling, solid solution treatment, primary cold rolling, first-grade aging treatment, secondary cold rolling and second-grade aging treatment. The tensile strength, the electric conductivity, the ductility and the stress relaxation resistance of the material can totally satisfy the use requirements of a vehicle high-current relay and a connector.

Description

technical field [0001] The invention relates to a copper alloy elastic material with high strength, high conductivity and high stress relaxation resistance and a preparation method thereof, belonging to the field of nonferrous metal processing. Background technique [0002] High-strength and high-elasticity copper-based alloys are widely used in industries such as medical treatment, aviation, navigation and navigation instruments, machinery manufacturing, instrumentation and instrument manufacturing due to their high strength, excellent elasticity, fatigue resistance, and small elastic hysteresis. At present, the copper-based elastic alloys in the domestic market are mainly made of tin phosphor bronze and beryllium bronze. Due to the poor elastic properties and stress relaxation resistance of tin phosphor bronze alloys, most of them are used in environments that require less elastic properties. middle. [0003] Beryllium bronze alloy is an alloy strengthened by aging precip...

Claims

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Application Information

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IPC IPC(8): C22C9/06C22F1/08
Inventor 彭丽军米绪军解浩峰黄国杰李艳锋尹向前冯雪高宝东杨振
Owner GRIMAT ENG INST CO LTD
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