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Ultrahigh-strength stress relaxation-resistant conductive elastic copper alloy and preparation method thereof

A stress relaxation resistant and elastic copper alloy technology, applied in conductive materials, conductive materials, metal rolling, etc., can solve the problems of increased hardness and brittleness of copper alloys, difficulty in meeting use requirements, and failure of elastic components

Active Publication Date: 2022-03-18
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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
As the king of elasticity of non-ferrous metal materials, beryllium bronze has incomparable performance advantages compared to other materials, but because beryllium has serious damage to human health and the environment, and the processing technology of beryllium bronze alloy is complicated and the actual production is difficult, at the same time When the alloy works for a long time in an environment exceeding 150 °C, the stress relaxation resistance of the alloy decreases significantly, resulting in the failure of elastic components
In addition, the bending formability of beryllium bronze alloy is poor, and it is impossible to prepare miniaturized elastic components
[0003] At present, copper alloys mainly rely on adding more strengthening elements to improve performance, but the number and distribution of precipitates formed by strengthening elements are not easy to control, which will easily lead to increased hard and brittle copper alloys, which will lead to stress relaxation resistance, elasticity, strength and Poor performance such as bending resistance, it is difficult to meet the needs of use

Method used

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  • Ultrahigh-strength stress relaxation-resistant conductive elastic copper alloy and preparation method thereof
  • Ultrahigh-strength stress relaxation-resistant conductive elastic copper alloy and preparation method thereof
  • Ultrahigh-strength stress relaxation-resistant conductive elastic copper alloy and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a method for preparing the ultra-high-strength stress-relaxation-resistant conductive elastic copper alloy described in the above technical solution, comprising the following steps:

[0037] (1) casting the alloy raw material after smelting to obtain a copper alloy ingot;

[0038] (2) performing hot rolling, solution treatment and primary aging treatment on the copper alloy ingot obtained in the step (1) successively to obtain a pre-deformed copper alloy;

[0039] (3) performing primary cold rolling and secondary aging treatment on the pre-deformed copper alloy obtained in the step (2) to obtain a re-deformed copper alloy; the total deformation of the primary cold rolling is 70% to 90%;

[0040] (4) The re-deformed copper alloy obtained in the step (3) is subjected to secondary cold rolling and annealing treatment successively to obtain an ultra-high-strength stress relaxation-resistant conductive elastic copper alloy; the total defor...

Embodiment 1

[0067] The composition of the ultra-high-strength stress-relaxation-resistant conductive elastic copper alloy provided in this example is shown in Example 1 of Table 1. The specific preparation method is as follows:

[0068] 1. Melting: Add electrolytic copper, sponge titanium, copper-chromium master alloy, pure magnesium and copper-silicon master alloy into the vacuum induction furnace. Raise the temperature to 1300°C, after the melt is completely melted, stir evenly, control the casting temperature at 1250°C, keep it warm for 30 minutes, and then cast to obtain copper alloy ingots.

[0069] 2. Hot rolling: Place the above-mentioned copper alloy ingot in a walking box furnace for heating at a temperature of 900°C and a holding time of 4 hours, and then carry out hot rolling. The final rolling temperature is controlled at 750°C, followed by water cooling.

[0070] 3. Solution treatment: place the above hot-rolled alloy slab in a box furnace for heating, the solution treatment t...

Embodiment 2

[0077] The composition of the ultra-high-strength stress-relaxation-resistant conductive elastic copper alloy provided in this example is shown in Example 2 of Table 1. The specific preparation method is as follows:

[0078] 1. Melting: Add electrolytic copper, sponge titanium, copper-chromium master alloy, pure magnesium and copper-silicon master alloy into the vacuum induction furnace. Raise the temperature to 1200°C, and after the melt is completely melted, stir evenly, control the casting temperature at 1150°C, keep the temperature for 30 minutes, and then cast to obtain copper alloy ingots.

[0079] 2. Hot rolling: Place the above-mentioned copper alloy ingot in a stepping box furnace for heating at a temperature of 800°C and a holding time of 4 hours, and then perform hot rolling. The final rolling temperature is controlled at 650°C, followed by water cooling.

[0080] 3. Solution treatment: place the hot-rolled slab of the above alloy in a box furnace for heating, the ...

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Abstract

The invention provides an ultrahigh-strength stress relaxation-resistant conductive elastic copper alloy and a preparation method thereof, and belongs to the technical field of copper alloy materials. The ultrahigh-strength stress relaxation-resistant conductive elastic copper alloy provided by the invention comprises the following components in percentage by mass: 2 to 4 percent of Ti, 0.2 to 0.6 percent of Mg, 0.2 to 0.5 percent of Cr, 0.02 to 0.05 percent of Si and the balance of Cu. According to the ultrahigh-strength stress relaxation-resistant conductive elastic copper alloy provided by the invention, multiple precipitated phases can be formed in the copper alloy by adding the Ti, Cr and Si elements, and meanwhile, the precipitation behavior of each precipitated phase can be effectively regulated and controlled by utilizing solid solution of the Mg element in the copper alloy by adding the Mg element, so that the mechanical property, the conductivity and the stress relaxation resistance of the copper alloy can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of copper alloy materials, in particular to an ultra-high-strength stress-relaxation-resistant conductive elastic copper alloy and a preparation method thereof. Background technique [0002] With the development of modern science and technology, high-end technology industries such as electronic information, 5G communications, and smart terminals are in a stage of rapid development, and the demand for copper-based elastic alloys for elastic components such as connectors and connectors is increasing. At the same time, more stringent requirements are put forward for the performance of copper-based elastic alloys, such as high strength, high elasticity, high resistance to stress relaxation, and excellent bending forming properties. 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 relaxatio...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/03C22F1/08B21B3/00C21D8/02H01B1/02
CPCC22C9/00C22C1/03C22F1/08B21B3/00C21D8/0226C21D8/0236C21D8/0247C21D8/0268H01B1/026B21B2003/005
Inventor 彭丽军黄国杰米绪军解浩峰杨振
Owner GRIMAT ENG INST CO LTD
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