Preparation method of ultra-fine zirconium carbide particle dispersed and strengthened copper-based composite materials for spot-welding electrode

A particle dispersion strengthening, copper matrix composite material technology is applied in the field of preparation of ultrafine zirconium carbide particle dispersion strengthening copper matrix composite materials for spot welding electrodes, which can solve the problems of high price of ultrafine zirconium carbide powder and reduce the preparation cost. , small size and simple preparation process

Active Publication Date: 2018-09-14
温岭工联工量刃具科技服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned technical problems in the prior art, the present invention provides a method for preparing a dispersion-strengthened copper-based composite material with ultrafine zirconium carbide particles for spot welding electrodes, which can improve its mechanical properties while maintaining the excellent electrical conductivity of copper, and at the same time It effectively solves the problem of high price of ultrafine zirconium carbide powder. This method also has the advantages of simple equipment, simple operation, high production efficiency, fine ZrC particles, and uniform distribution.

Method used

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  • Preparation method of ultra-fine zirconium carbide particle dispersed and strengthened copper-based composite materials for spot-welding electrode
  • Preparation method of ultra-fine zirconium carbide particle dispersed and strengthened copper-based composite materials for spot-welding electrode

Examples

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Effect test

Embodiment 1

[0041] A preparation method of ultrafine zirconium carbide particle dispersion strengthened copper matrix composite material for spot welding electrodes is as follows:

[0042] 1. Weighing: Weigh Cu powder with a particle size of ~0.5μm, Zr with a particle size of ~45μm, and graphite powder with a particle size of ~100nm in a molar ratio of 1.1:1:1. The raw materials used are all commercial powders.

[0043] 2. Mixing materials: Put the weighed Cu powder, Zr powder, C powder, and grinding balls and ball milling tanks into a vacuum glove box. After vacuuming to 5-10Pa, fill it with argon to normal pressure. Put the balls and powder into the ball mill jar in the gas environment, and then put the sealed ball mill jar into the roller ball mill and mix for 10 hours, wherein the balls are ZrO 2 Grinding balls, the weight ratio of the grinding balls to the powder is 10:1, and the rotating speed of the ball mill is 70 rpm;

[0044] 3. Molding: Put the Cu-Zr-C mixed powder into a stee...

Embodiment 2

[0051] A method for preparing a dispersion-strengthened copper-based composite material with ultrafine zirconium carbide particles for spot welding electrodes is the same as in Example 1 except for the following.

[0052] In this example:

[0053] (1) The rotating speed of ball mill is 50 revs / min; Apply the magnetic stirring current of 30A;

[0054] (2) Oxygen-free copper block and Cu-containing ultrafine ZrC powder are placed in a vacuum melting furnace at a weight ratio of 299:1;

[0055] (3) Obtain an ultrafine ZrC / Cu composite material with a ZrC content of 0.2wt.%. The tensile strength of the composite material is 302 MPa, and the electrical conductivity is 96% IACS.

Embodiment 3

[0057] A method for preparing a dispersion-strengthened copper-based composite material with ultrafine zirconium carbide particles for spot welding electrodes is the same as in Example 1 except for the following.

[0058] In this example:

[0059] (1) The speed of the ball mill is 60 rpm; the oxygen-free copper block and the ultrafine ZrC powder containing Cu are put into the vacuum melting furnace at a weight ratio of 59:1;

[0060] (2) The magnetic stirring time is 10min, and the magnetic stirring current is 30A;

[0061] (3) Obtain an ultrafine ZrC / Cu composite material with a ZrC content of 1.0wt.%. The composite has a tensile strength of 414 MPa and an electrical conductivity of 90% IACS.

[0062] figure 1 It is the XRD detection result of Cu-containing ultrafine ZrC powder. From figure 1 It can be seen that the ultrafine ZrC powder containing Cu is only composed of two phases of ZrC and Cu, and no zirconia, unreacted Zr or C was detected, indicating that Zr and C we...

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Abstract

The invention belongs to the preparation field of copper-based composite materials for welding electrode, and discloses a preparation method of ultra-fine zirconium carbide particle dispersed and strengthened copper-based composite materials for spot-welding electrode. The preparation method comprises the following steps that cold press molding of uniformly mixed Cu-Zr-C powder is carried out, then powder compact is put into a self-propagating high temperature synthesis device to ignite to obtain ultra-fine ZrC powder body containing Cu, and a mixture of oxygen-free copper and the ultra-fine ZrC powder body containing Cu are smelted in a vacuum melting furnace and magnetic stirring is carried out, so that ultra-fine ZrC particle dispersed and strengthened copper-based composite materials are prepared. The preparation method has the characteristics of being low in cost, simple in techniques, high in production efficiency, tiny in ZrC size, uniform in distribution and the like.

Description

technical field [0001] The invention belongs to the field of preparation of copper-based composite materials for welding electrodes, and is mainly used for welding machine electrode heads, electrode caps, etc., and specifically relates to a preparation method of ultrafine zirconium carbide particle dispersion-strengthened copper-based composite materials for spot welding electrodes. Background technique [0002] Spot welding is widely used in industries such as automobile, instrumentation and aviation manufacturing. Because it is often subjected to high temperature and high pressure during service, copper alloy electrodes are prone to failure, which reduces production efficiency and affects the quality of solder joints. With the widespread use of automatic welding and welding robots in modern production, there is an urgent need to develop electrode materials with both excellent electrical conductivity and mechanical properties. One of the effective ways to solve the insuffic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/10C22C1/05
CPCC22C1/058C22C1/1036C22C9/00C22C32/0052C22C1/1047
Inventor 张梦贤赵先锐方一航霍颜秋姚海龙王洪涛陈清宇白小波
Owner 温岭工联工量刃具科技服务有限公司
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