A kind of superfine zirconium carbide particles-zirconium boride rod crystal reinforced copper-based electrode material and its preparation method

A technology of electrode material and zirconium rod crystal, which is applied in the field of preparation of copper-based electrode materials for welding electrodes, can solve the problems of low porosity, high price of ultrafine zirconium carbide and zirconium boride powder, etc. Extraction process, the effect of promoting refinement

Active Publication Date: 2019-12-03
JIUJIANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned technical problems in the prior art, the present invention provides an ultrafine zirconium carbide particle-zirconium boride rod crystal reinforced copper-based electrode material and its preparation method, which can improve its mechanical properties while maintaining the excellent electrical conductivity of copper At the same time, it effectively solves the problem of expensive ultrafine zirconium carbide and zirconium boride powders. This method also has the advantages of simple equipment, simple operation, low requirements for raw materials, high production efficiency, small reinforcements, uniform distribution, high product hardness, and voids. Advantages such as low rate

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  • A kind of superfine zirconium carbide particles-zirconium boride rod crystal reinforced copper-based electrode material and its preparation method
  • A kind of superfine zirconium carbide particles-zirconium boride rod crystal reinforced copper-based electrode material and its preparation method

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Effect test

Embodiment 1

[0039] An ultrafine zirconium carbide particle-zirconium boride rod crystal reinforced copper-based electrode material, the preparation process of which is as follows:

[0040] 1. Weighing: Cu powder with a particle size of ~0.5 μm, Zr powder with a particle size of ~45 μm, and B powder with a particle size of ~14 μm 4 C powder weighs the raw materials at a molar ratio of 1.28:3:1, and all raw materials used are commercial powders.

[0041] 2. Mixing: Mix the weighed Cu powder, Zr powder, B 4 C powder, as well as balls and milling jars are placed in a vacuum glove box, and after vacuuming to 5-10Pa, argon gas is flushed to normal pressure, and balls and powder are put into a ball milling jar in an inert gas environment, and then The sealed ball mill jar was put into a roller ball mill and mixed for 10 hours, wherein the balls were ZrO 2 Grinding balls, the weight ratio of grinding balls to powder is 10:1, and the rotating speed of the ball mill is 60 rpm.

[0042] 3. Loadin...

Embodiment 2

[0048] An ultrafine zirconium carbide particle-zirconium boride rod crystal reinforced copper-based electrode material and its preparation method are the same as in Example 1 except for the following.

[0049] In this example:

[0050] (1) Cu-Zr-B 4 C mixed powder Cu powder, Zr powder, B 4 C powder is weighed at a molar ratio of 0.91:3:1; and the mixed powder is mixed in a ball mill for 14 hours, the speed of the ball mill is 50 rpm; the heating rate of the tube furnace is 20°C / min;

[0051] (2) Oxygen-free copper block and Cu-containing ultrafine ZrC-ZrB 2 The powder is put into the vacuum melting furnace according to the weight ratio of about 424:1;

[0052] (3) Obtain ZrC-ZrB 2 Ultrafine ZrC-ZrB with ceramic content of 0.2wt.% 2 / Cu electrode material. The composite has a tensile strength of 365 MPa and an electrical conductivity of 92% IACS.

Embodiment 3

[0054] An ultrafine zirconium carbide particle-zirconium boride rod crystal reinforced copper-based electrode material and its preparation method are the same as in Example 1 except for the following.

[0055] In this example:

[0056] (1) Cu-Zr-B 4 Cu powder particle size in C mixed powder is 25μm, B 4 The particle size of C powder is about 28μm; the speed of the ball mill is 70 rpm;

[0057] (2) Oxygen-free copper block and Cu-containing ultrafine ZrC-ZrB 2 The powder is put into the vacuum melting furnace according to the weight ratio of 79:1;

[0058] (3) The holding time is 10min, and the magnetic stirring current is 30A;

[0059] (4) Get ZrC-ZrB 2 Ultrafine ZrC-ZrB with ceramic content of 1wt.% 2 / Cu electrode material. The composite has a tensile strength of 487 MPa and an electrical conductivity of 89% IACS.

[0060] figure 1 Ultrafine ZrC-ZrB containing Cu 2 XRD detection results of the composite powder. From figure 1 It can be seen that the ultrafine ZrC-...

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Abstract

The invention belongs to the field of preparation of copper-based composite materials for welding electrodes, and discloses an ultrafine zirconium carbide particle-zirconium boride rod crystal reinforced copper-based electrode material and a preparation method thereof: uniformly mixed Cu-Zr-B 4 C mixed powder was put into a high-temperature tubular atmosphere furnace and heated to 1250 °C to obtain Cu-containing ultrafine ZrC particles and ZrB 2 Rod crystal composite powder, followed by smelting oxygen-free copper and Cu-containing ultrafine ZrC‑ZrB in a vacuum melting furnace 2 Mixture of composite powders and applying magnetic stirring to prepare ultrafine ZrC particles‑ZrB 2 Rod grain reinforced copper-based electrode material. The method of the invention has the characteristics of low cost, simple process, high production efficiency, small reinforcement body, uniform distribution and the like.

Description

technical field [0001] The invention belongs to the field of preparation of copper-based electrode materials for welding electrodes, and is mainly used for welding machine electrode heads, electrode caps, etc., and specifically relates to an ultrafine zirconium carbide particle-zirconium boride rod crystal reinforced copper-based electrode material and a preparation method thereof . 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 insuffi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/02C22C9/00
CPCC22C1/1015C22C1/1036C22C9/00C22C1/1047
Inventor 张梦贤姚海龙王洪涛陈清宇白小波赵先锐方一航霍颜秋王天乐
Owner JIUJIANG UNIV
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