High-strength high-conductivity fatigue-resistant copper alloy and preparation method and application thereof

A high-conductivity and fatigue-resistant technology, applied in the field of high-strength, high-conductivity, fatigue-resistant copper alloys and their preparation, can solve the problems of broken strings and affecting the normal operation of high-speed railways.

Active Publication Date: 2021-01-01
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual use process, it is found that the suspension strings currently used often break due to fatigue failure of the material, which affects the normal operation of the high-speed railway

Method used

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  • High-strength high-conductivity fatigue-resistant copper alloy and preparation method and application thereof
  • High-strength high-conductivity fatigue-resistant copper alloy and preparation method and application thereof
  • High-strength high-conductivity fatigue-resistant copper alloy and preparation method and application thereof

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preparation example Construction

[0059] The present invention provides a method for preparing the high-strength, high-conductivity, fatigue-resistant copper alloy described in the above technical solution, comprising the following steps:

[0060] Melting and casting the alloy raw material according to the above-mentioned ratio of alloy elements to obtain a copper alloy ingot;

[0061] The copper alloy ingot is sequentially subjected to continuous extrusion, primary drawing, intermediate annealing treatment, secondary drawing and continuous annealing treatment to obtain the high-strength, high-conductivity, fatigue-resistant copper alloy.

[0062] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0063] According to the above alloy element ratio, the invention melts and casts alloy raw materials to obtain copper alloy ingots.

[0064] The present invention has no special requirements on the source of ...

Embodiment 1

[0088] According to the mass ratio of the alloy elements in Example 1 in Table 1, add electrolytic copper to the intermediate frequency induction furnace and melt, then add copper chromium and copper zirconium master alloy, after the above materials are melted, continue to add pure magnesium ingots, add After compounding the covering agent, add burning charcoal, and raise the temperature to 1250°C. After the melt is completely melted, introduce argon gas, and then stir evenly. The casting temperature is controlled at 1200°C. A copper rod with a diameter of 28mm, wherein the lead-up pitch is 5mm, the mold insertion depth into the copper liquid is 100mm, the lead-up speed is 300mm / min, and the continuous casting stop-draw ratio is 60%, to obtain a copper alloy rod;

[0089] The above-mentioned copper alloy rod is placed in a continuous extruder for continuous extrusion. The extruder heating temperature is 400°C, the extrusion speed is 6 rpm, the extrusion pass is 1 time, and the ...

Embodiment 2

[0096] According to the mass ratio of the alloying elements in Example 2 in Table 1, add electrolytic copper to the intermediate frequency induction furnace and melt, then add copper chromium and copper zirconium master alloy, after the above materials are melted, continue to add pure magnesium ingots, add After compounding the covering agent, add burning charcoal, and raise the temperature to 1200°C. After the melt is completely melted, introduce argon gas and stir evenly. The casting temperature is controlled at 1150°C. A copper rod with a diameter of 20mm, wherein the pitch of the lead is 2mm, the depth of the mold inserted into the copper liquid is 80mm, the speed of the lead is 400mm / min, and the continuous casting stop-draw ratio is 50% to obtain a copper alloy rod;

[0097] The above-mentioned copper alloy rod is placed in a continuous extruder for continuous extrusion. The extruder heating temperature is 600°C, the extrusion speed is 10 rpm, the extrusion pass is 5 time...

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Abstract

The invention relates to the technical field of non-ferrous metal processing, in particular to a high-strength high-conductivity fatigue-resistant copper alloy and a preparation method and applicationthereof. According to the high-strength high-conductivity fatigue-resistant copper alloy, copper alloy components and microstructures are regulated and controlled through the synergistic effect of all alloy elements, and the copper-magnesium alloy with multiple micro-nano scale dispersively distributed precipitation phases, fine and uniform precipitation phase sizes and excellent fatigue performance is obtained; and compared with a traditional copper-magnesium alloy, the copper alloy has higher strength, conductivity and fatigue resistance.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal processing, in particular to a high-strength, high-conductivity, fatigue-resistant copper alloy and a preparation method and application thereof. Background technique [0002] High-strength and high-conductivity copper alloys have been widely used in electrified railway catenary systems due to their excellent mechanical and physical properties, and are an important non-ferrous metal structure-functional integration material. At present, the copper alloy materials of electrified railway catenary system mainly include Cu-Ag, Cu-Sn, Cu-Mg and Cu-Cr-Zr. Cu-Ag and Cu-Sn have good electrical conductivity, but poor strength and high temperature resistance. Cu-Cr-Zr alloy is an alloy material with excellent strength and electrical conductivity. It is an ideal material for various components in the catenary system. However, because Zr element is easily oxidized in the atmosphere, the composition ...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02C22F1/08
CPCC22C9/00C22C1/02C22F1/08
Inventor 彭丽军黄国杰米绪军解浩峰李增德黄树晖刘冬梅杨振张文婧张习敏李卿
Owner GRIMAT ENG INST CO LTD
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