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A production process of silver-tungsten carbide compound silver-nickel-copper electric contact

A silver tungsten carbide and production process technology, which is applied in the field of processing technology for manufacturing electric contacts, can solve the problems of high silver content of electric contacts and low brazing rate of multi-layer brazing, and achieve good welding performance, silver content saving, good The effect of mobility

Inactive Publication Date: 2014-10-29
ZHEJIANG TIANYIN ALLOY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to improve the problems in the background technology that the silver content of the electric contact is too high and the cladding rate is too low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] For powder mixing, take 84g of Ag powder, 2g of C powder, and 14g of WC powder for mixing. The purity of Ag powder: Ag% is 99.5, and the bulk density is 1.5 g / cm 2 , the particle size of WC powder is 2.5μ, and the graphite is colloidal graphite, forming a total of 100g of AgWc 12 C 3 powder;

[0021] In addition, take 2.2g of Ag powder, 5 g of Ni powder, and 12.8 g of Cu powder for mixing. The purity of Ag powder: Ag% is 99.5, and the bulk density is 1.5 g / cm 2 , Copper powder purity: Cu% is 99.5, Ni powder purity: Ni% is 99.5. Composition of a total of 20g of Ag, Ni, Cu alloy powder;

[0022] The mixed AgWc 12 C 3 Put the powder into a ball-type powder mixer and mix the powder for 9 hours; in addition, put the Ag, Ni, and Cu alloy powders into a V-type powder mixer and mix for 3 hours.

[0023] The mixed AgWc 12 C 3 Powder and Ag, Ni, Cu alloy powder were loaded into stainless steel boats respectively, and sintered in hydrogen environment, Ag, Ni, Cu alloy powd...

Embodiment 2

[0030] Mix powder, take Ag powder 85g, C powder 3g, WC powder 12g and mix, Ag powder purity: Ag% is 99.6, bulk density is 1.8 g / cm 2 , the particle size of WC powder is 3μ, and the graphite is colloidal graphite, forming a total of 100g of AgWc 12 C 3 powder;

[0031] In addition, take 2.2g of Ag powder, 5 g of Ni powder, and 12.8 g of Cu powder for mixing. The purity of Ag powder: Ag% is 99.5, and the bulk density is 3.2 g / cm 2 , Copper powder purity: Cu% is 99.5, Ni powder purity: Ni% is 99.5. Composition of a total of 20g of Ag, Ni, Cu alloy powder;

[0032] The mixed AgWc 12 C 3 Put the powder into a ball-type powder mixer and mix the powder for 9 hours; in addition, put the Ag, Ni, and Cu alloy powders into a V-type powder mixer and mix for 3 hours.

[0033] The mixed AgWc 12 C 3 Powder and Ag, Ni, Cu alloy powder were loaded into stainless steel boats respectively, and sintered in hydrogen environment, Ag, Ni, Cu alloy powder and AgWc 12 C 3 The powders were re...

Embodiment 3

[0040] For powder mixing, take 68.8g of Ag powder, 3.2g of C powder, and 8g of WC powder for mixing. The purity of Ag powder: Ag% is 99.5, and the bulk density is 2.5 g / cm 2 , the particle size of WC powder is 3.5μ, and the graphite is colloidal graphite, forming a total of 80g of AgWc 12 C 3 powder.

[0041] In addition, take 2.2g of Ag powder, 5 g of Ni powder, and 12.8 g of Cu powder for mixing. The purity of Ag powder: Ag% is 99.5, and the bulk density is 3.3 g / cm 2 , Copper powder purity: Cu% is 99.5, Ni powder purity: Ni% is 99.5. A total of 20 g of Ag, Ni, Cu alloy powder was composed.

[0042] The mixed AgWc 12 C 3 Put the powder into a ball-type powder mixer and mix the powder for 9 hours; in addition, put the Ag, Ni, and Cu alloy powders into a V-type powder mixer and mix for 3 hours.

[0043] The mixed AgWc 12 C 3 Powder and Ag, Ni, Cu alloy powder were loaded into stainless steel boats respectively, and sintered in hydrogen environment, Ag, Ni, Cu alloy powde...

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Abstract

A production process of a silver-tungsten carbide and silver-nickel-copper compounded electric contact includes: mixing, namely mixing Ag powder, C powder and Wc powder to form AgWc12C3 powder, and mixing Ag powder, Ni powder and Cu powder to form Ag, Ni and Cu alloy powder; sintering and pelleting; namely sintering and pelleting the AgWc12C3 powder and the Ag, Ni and Cu alloy powder; pre-pressing, spreading the sintered Ag, Ni and Cu alloy particles and AgWc12C3 particles into two layers and using a die for compression moulding; sintering, placing the pressed blank formed by pre-pressing into a sintering furnace and sintered in an anaerobic environment; and re-pressing, using the die for compression moulding according to requirements of products. Ag powder in the prior art is substituted by the Ag, Ni and Cu alloy powder, nickel and copper are added, silver content in a composite layer is saved, and brazing rate is increased after modification, and bonding strength is improved.

Description

technical field [0001] The invention relates to a processing technology for manufacturing electric contacts, in particular to a processing technology for electric contacts made of silver-tungsten carbide compounded with silver-nickel-copper-nickel-copper. Background technique [0002] Electric contacts are the core components of electrical switches, and these products are mainly used in high and low voltage switching appliances. Welding is usually used to realize the effective connection of the electrical contact with the contact plate and the contact bridge. The quality of welding has a very important direct relationship with the reliability of electrical operation, the temperature rise of electrical appliances, the on-off ability of contacts, the arc burning loss and the service life. [0003] At present, the electrical contact components are made by AgWc 12 C 3 The powder mixing-forming-sintering-densification process is used to make a monolithic contact, and then weld...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/0233H01H11/04
Inventor 赵立文
Owner ZHEJIANG TIANYIN ALLOY TECH
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