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Method for preparing TiC-reinforced copper-based electric contact composite material

A composite material and electrical contact technology, which is applied in the field of metal materials, can solve the problems of poor bonding between the second phase and the copper matrix interface, limit the performance of composite materials, and complicate the preparation process, and achieve low cost, high efficiency, and simple and stable preparation process Effect

Active Publication Date: 2018-06-12
STATE GRID HEBEI ENERGY TECH SERVICE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method effectively improves the performance of the copper electrical contact material through the second phase compounding, but the preparation process is relatively complicated, and the second phase is mostly externally added, and the second phase in the obtained composite material is poorly bonded to the interface of the copper matrix, which limits the performance of copper. Further Improvement of the Performance of Base Electrical Contact Composite Materials

Method used

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  • Method for preparing TiC-reinforced copper-based electric contact composite material
  • Method for preparing TiC-reinforced copper-based electric contact composite material
  • Method for preparing TiC-reinforced copper-based electric contact composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Raw material preparation: Prepare the raw materials required for the preparation of TiC reinforced copper-based electrical contact materials, weighed by mass percentage, electrolytic copper 90%, copper powder 5%, TiC powder: 2%, sponge titanium 2.4% and graphite powder 0.6%;

[0022] (2) Preparation of carbon source: Firstly, graphite powder and TiC powder were fully mixed, and then the mixed powder was placed in a ball mill for 3 hours, and graphite-coated submicron TiC particles were obtained by ball milling. Then the ball-milled powder was fully mixed with copper powder and continued to be milled in a ball mill for 2 hours, and the graphite-coated submicron TiC fine particles were embedded into the copper powder through ball milling to obtain Cu-graphite-coated TiC mixed powder.

[0023] (3) Powder briquetting and sintering: Press the Cu-graphite-coated TiC mixed powder obtained in (2) into a prefabricated block with a length of 20mm, a width of 20mm, and a heigh...

Embodiment 2

[0029] (1) Raw material preparation: Prepare the raw materials required for the preparation of TiC reinforced copper-based electrical contact materials, weighed by mass percentage, electrolytic copper 82.5%, copper powder 10%, TiC powder: 2.5%, sponge titanium 4% and graphite powder 1%;

[0030] (2) Preparation of carbon source: Firstly, graphite powder and TiC powder were fully mixed, and then the mixed powder was placed in a ball mill for ball milling for 6 hours, and graphite-coated submicron TiC particles were obtained by ball milling. Then the ball-milled powder was fully mixed with copper powder and continued to be milled in a ball mill for 4 hours, and the graphite-coated submicron TiC particles were embedded into the copper powder through ball milling to obtain Cu-graphite-coated TiC mixed powder.

[0031] (3) Powder briquetting and sintering: Press the Cu-graphite-coated TiC mixed powder obtained in (2) into a prefabricated block with a length of 20mm, a width of 20mm...

Embodiment 3

[0036](1) Raw material preparation: Prepare the raw materials required for the preparation of TiC reinforced copper-based electrical contact materials, weighed by mass percentage, electrolytic copper 94%, copper powder 4.5%, TiC powder: 0.5%, sponge titanium 0.8% and graphite powder 0.2%;

[0037] (2) Preparation of carbon source: Firstly, graphite powder and TiC powder were fully mixed, and then the mixed powder was placed in a ball mill for 2 hours of ball milling, and graphite-coated submicron TiC particles were obtained by ball milling. Then the ball-milled powder was fully mixed with copper powder and continued to be milled in a ball mill for 2 hours, and the graphite-coated submicron TiC fine particles were embedded into the copper powder through ball milling to obtain Cu-graphite-coated TiC mixed powder.

[0038] (3) Powder briquetting and sintering: Press the Cu-graphite-coated TiC mixed powder obtained in (2) into a prefabricated block with a length of 20mm, a width o...

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Abstract

The invention discloses a method for preparing a TiC-reinforced copper-based electric contact composite material. The preparing method includes the steps of raw material preparation, carbon source manufacturing, powder briquetting and sintering, TiC self-forming reaction synthesis and the like. The method for preparing the TiC-reinforced copper-based electric contact composite material has the characteristics that the preparation technology is simple and stable, cost is low, efficiency is high and the method is suitable for industrial production and application. The carbon source used in the preparing method refers to Cu-graphite coated TiC mixed powder obtained by ball milling, the grain size of synthesized TiC is 0.5-2.0m, and TiC grains are evenly distributed on a copper substrate. Theprepared TiC-reinforced copper-based electric contact composite material is high in compactness, good combination of the strength, hardness, electrical conductivity and thermal conductivity of the composite material can be realized by adjusting the content of the TiC, and the high-strength and high-conductivity characters are achieved.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a preparation method of a TiC-reinforced copper-based electrical contact composite material. Background technique [0002] Electrical contact materials are an important part of electrical materials. The electrical contacts made of them are very important contact elements in instruments, meters and electrical switches. They play a role in breaking and disconnecting circuits in power transmission and distribution systems and electrical systems. connected function. The performance of electrical contacts and their materials plays a vital role in the safe and stable operation of the entire system. In recent years, the research and development of electrical contact materials have received more and more attention. The phenomenon of electrical contacts in the process of opening and closing is extremely complex, and there are many influencing factors. The ideal electrical cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05
Inventor 徐雪霞李文彬王勇董国振李国维冯砚厅王庆陈二松李晓峰
Owner STATE GRID HEBEI ENERGY TECH SERVICE CO LTD
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