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Cu-TiC electric contact composite material and preparation method thereof

A composite material, electrical contact technology, applied in the direction of contacts, circuits, electrical switches, etc., can solve the problems of pure copper hardness, low strength, limited application, resistance to arc erosion, etc.

Active Publication Date: 2021-07-06
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

[0003] Copper has excellent electrical conductivity and thermal conductivity, and is a commonly used electrical contact material. However, due to the low hardness and strength of pure copper, it has insufficient ability to resist arc erosion and mechanical wear when used as an electrical contact material, which limits its use. Application in strong arc ablation environment

Method used

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  • Cu-TiC electric contact composite material and preparation method thereof
  • Cu-TiC electric contact composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] (1) Raw material preparation: weighed by mass percentage, titanium powder with a particle size of 5 μm and a purity greater than 99%: 24%, graphite powder with a particle size of 50 μm and a purity greater than 99%: 6%, the rest is 50 μm with a purity > 99.5% copper powder;

[0031] (2) Mixing of raw materials: the graphite powder is firstly mixed evenly with part of the copper powder, then fully mixed with the titanium powder and the remaining copper powder to obtain Cu-Ti-graphite mixed powder;

[0032] (3) Cold-press forming: the Cu-Ti-graphite mixed powder obtained in step (2) is cold-pressed into a cylindrical prefabricated block, and the pressure used is 80 MPa.

[0033] (4) Hot-press sintering: place the cold-pressed prefabricated block in a hot-press sintering furnace for hot-press sintering;

[0034] Hot pressing sintering adopts two-step method: first heating to 850°C, holding at 100MPa pressure for 60min, then further raising the temperature to 1050°C, holdi...

Embodiment 2

[0038] (1) Raw material preparation: Weigh by mass percentage, titanium powder with a particle size of 50 μm and a purity greater than 99%: 8%, graphite powder with a particle size of 5 μm and a purity greater than 99%: 2%, the rest is 50 μm with a purity > 99.5% copper powder;

[0039] 2) Mixing of raw materials: the graphite powder is firstly mixed evenly with part of the copper powder, and then fully mixed with the titanium powder and the remaining copper powder to obtain Cu-Ti-graphite mixed powder;

[0040] (3) cold press forming: the Cu-Ti-graphite mixed powder obtained in step (2) is cold pressed into a cylindrical prefabricated block, and the pressure used is 80MPa;

[0041] (4) Hot-press sintering: place the cold-pressed prefabricated block in a hot-press sintering furnace for hot-press sintering;

[0042] Hot pressing sintering adopts two-step method: first heating to 850°C, holding at 100MPa pressure for 30min, then further raising the temperature to 1050°C, holdin...

Embodiment 3

[0045] (1) Raw material preparation: Weigh by mass percentage, titanium powder with a particle size of 10 μm and a purity greater than 99%: 4%, graphite powder with a particle size of 3 μm and a purity greater than 99%: 1%, the rest is 20 μm with a purity > 99.5% copper powder;

[0046]2) Mixing of raw materials: the graphite powder is firstly mixed evenly with part of the copper powder, and then fully mixed with the titanium powder and the remaining copper powder to obtain Cu-Ti-graphite mixed powder;

[0047] (3) cold press forming: the Cu-Ti-graphite mixed powder obtained in step (2) is cold pressed into a cylindrical prefabricated block, and the pressure used is 50MPa;

[0048] (4) Hot-press sintering: place the cold-pressed prefabricated block in a hot-press sintering furnace for hot-press sintering;

[0049] Hot pressing sintering adopts two-step method: first heating to 900°C, holding at 100MPa pressure for 30min, then raising the temperature further to 1050°C, holding...

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Abstract

The invention discloses a Cu-TiC enhanced electric contact composite material and a preparation method thereof. The preparation method specifically comprises the following steps: mixing titanium powder, graphite powder and copper powder through ball milling to obtain Cu-Ti-graphite mixed powder, carrying out cold press molding on the mixed powder, and sintering in a hot press sintering furnace to obtain the Cu-TiC electric contact composite material. In the Cu-TiC reinforced electric contact composite material, TiC is synthesized through an authigenic reaction and is well combined with a copper matrix interface, TiC reinforcements in the prepared composite material are distributed in a continuous network shape, the copper matrix is distributed between TiC networks, a continuous conductive phase is formed; The fusion welding resistance, arc ablation resistance and mechanical wear resistance of the prepared composite material are remarkably improved, and meanwhile, the composite material has excellent electric conductivity and heat conductivity.

Description

technical field [0001] The invention relates to the technical field of electrical materials, in particular to a Cu-TiC electrical contact composite material and a preparation method thereof. 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. [0003] Copper has excellent electrical conductivity and thermal conductivity, and is a commonly used electrical contact material. However, due to the low hardness and strength of pure copper, it has insufficient ability to resist arc erosion and mechanical wear when used as an electrical...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C32/00C22C1/05H01H1/025H01H11/04
CPCC22C9/00C22C32/0052C22C1/058H01H1/025H01H11/048
Inventor 徐雪霞曾四鸣王勇王庆李国维董国振李文彬冯砚厅
Owner STATE GRID HEBEI ENERGY TECH SERVICE CO LTD
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