Preparation method for TiC/Ti5Si3 composite enhanced copper-based electrical contact material

An electrical contact material and composite reinforcement technology, applied in the field of metal materials, can solve the problems of poor bonding between the reinforcement phase and the matrix interface, limiting the performance of composite materials, and low density of composite materials, achieving low cost, high hardness, and good stability Effect

Active Publication Date: 2018-06-29
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

At present, the preparation of copper-based electrical contact composite materials mostly adopts the method of mixing and sintering the reinforcing phase and copper powder. The composite material prepared by this method has low density, and the bonding between the reinforcing phase and the matrix interface is poor, which limits the further improvement of the performance of the composite material.
In comparison, the self-generated reaction of copper melt to synthesize reinforcements to reinforce copper matrix composites has better performance, but there are still few preparation methods at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Raw material preparation: ready to prepare TiC / Ti 5 Si 3 The raw materials required for composite reinforced copper-based electrical contact materials are weighed by mass percentage, electrolytic copper 83.89%, sponge titanium 5.86%, SiC powder 1.43%, graphite powder 0.82%, copper powder 8%;

[0017] (2) Preparation of graphite-coated SiC mixed powder: Firstly, graphite powder and SiC powder are fully mixed, and then the mixed powder is placed in a ball mill for ball milling for 3 hours, and SiC is refined to submicron level by ball milling, and graphite-coated SiC is obtained Mix powder.

[0018] (3) Preparation of Cu-graphite-coated SiC preform: Mix the graphite-coated SiC mixed powder obtained in step (2) with copper powder, and place it in a ball mill for ball milling for 2 hours to obtain a copper-graphite-coated SiC mixed powder ;Compress the mixed powder into a prefabricated block with a length of 15mm, a width of 15mm and a height of 15mm;

[0019] (4)TiC...

Embodiment 2

[0022] (1) Raw material preparation: ready to prepare TiC / Ti 5 Si 3 The raw materials required for composite reinforced copper-based electrical contact materials are weighed by mass percentage, electrolytic copper 77.25%, sponge titanium 7%, SiC powder 3.57%, graphite powder 0.18%, copper powder 12%;

[0023] (2) Preparation of graphite-coated SiC mixed powder: Firstly, graphite powder and SiC powder are fully mixed, and then the mixed powder is placed in a ball mill for 5 hours, and SiC is refined to submicron by ball milling, and graphite-coated SiC is obtained. Mix powder.

[0024] (3) Preparation of Cu-graphite-coated SiC preform: The graphite-coated SiC mixed powder obtained in (2) was mixed with copper powder, and placed in a ball mill for ball milling for 4 hours to obtain copper-graphite-coated SiC mixed powder. Press the mixed powder into a prefabricated block with a length of 15mm, a width of 15mm and a height of 25mm;

[0025] (4)TiC / Ti 5 Si 3 Reaction synthesi...

Embodiment 3

[0028] (1) Raw material preparation: ready to prepare TiC / Ti 5 Si 3 The raw materials required for composite reinforced copper-based electrical contact materials are weighed by mass percentage, electrolytic copper 87.25%, sponge titanium 5%, SiC powder 1.43%, graphite powder 0.32%, copper powder 8%;

[0029](2) Preparation of graphite-coated SiC mixed powder: Firstly, graphite powder and SiC powder are fully mixed, and then the mixed powder is placed in a ball mill for ball milling for 3 hours, and SiC is refined to submicron level by ball milling, and graphite-coated SiC is obtained Mix powder.

[0030] (3) Preparation of Cu-graphite-coated SiC preform: Mix the graphite-coated SiC mixed powder obtained in step (2) with copper powder, and place it in a ball mill for ball milling for 2 hours to obtain a copper-graphite-coated SiC mixed powder . Press the mixed powder into a prefabricated block with a length of 15mm, a width of 15mm and a height of 12mm;

[0031] (4)TiC / Ti ...

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Abstract

The invention discloses a preparation method for a TiC/Ti5Si3 composite enhanced copper-based electrical contact material. The preparation method comprises the following steps of preparation of raw materials, preparation of graphite-coated Sic mixed powder, preparation of Cu-graphite-coated Sic prefabricated body, reaction synthesis of TiC/Ti5Si3 and the like. The preparation method has the advantages of being simple in preparation process, low in cost and high in efficiency, and the prepared TiC/Ti5Si3 composite reinforced copper-based electrical contact material has high hardness, high wearresistance and high conductivity, and is suitable for industrial production and application; and Tic is obtained through self-generation reaction of Ti, graphite and Sic in a copper melt, the Tic is near-stoichiometric, the stability is good, the particle size is in the range of 0.5-3.5 micrometers, the Tic is uniformly distributed on a copper substrate, and prepared Ti5Si3 is rod-shaped or plate-shaped.

Description

Technical field: [0001] The invention belongs to the field of metal materials, in particular to a TiC / Ti 5 Si 3 A method for preparing a composite reinforced copper-based electrical contact material. Background technique: [0002] Electrical contact elements made of electrical contact materials play a very important role in instruments and meters and electrical switches. The development of high-voltage power transmission and transformation to large-capacity ultra-high voltage, the improvement of automation level and sensitivity requirements of low-voltage power distribution system and control system, and the upgrading of electronic industrial products all put forward new requirements for electrical contact materials. An ideal electrical contact material must have good electrical and thermal conductivity, mechanical properties, electrical contact properties, chemical properties and processing properties. Metal silver has high electrical conductivity, good thermal conductiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/02C22C9/00C22C32/00
CPCC22C1/101C22C1/1015C22C1/1036C22C9/00C22C32/0047C22C1/1052
Inventor 强东盛徐雪霞王勇李文彬敬尚前冯砚厅王庆陈二松贾伯岩
Owner STATE GRID HEBEI ENERGY TECH SERVICE CO LTD
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