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Method for improving distribution uniformity of reinforced phase in silver metal oxide electric contact material

A technology of distribution uniformity and oxide electricity, which is applied in the field of improving the uniformity of enhanced phase distribution in silver metal oxide electrical contact materials, and can solve problems such as uneven distribution of enhanced phases, poor stability and consistency of electrical properties of electrical contact materials, etc. , to achieve the effects of shortening the homogenization time, increasing the relative motion speed, and increasing the concentration of vacancies

Inactive Publication Date: 2018-12-07
FUDA ALLOY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of poor electrical stability and consistency of the electrical properties of the electrical contact material due to the inhomogeneous distribution of the reinforcing phase in the silver metal oxide contact material, and to provide a method for improving the electrical contact of the silver metal oxide. A method for enhancing the uniformity of phase distribution in the material, through which the uniformity of the enhanced phase distribution is significantly improved, thereby improving the stability and consistency of the electrical properties of the electrical contact material, which in turn helps to ensure the reliability of the switching device

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] a) 1 kg of Cd powder with an average particle size of 5 μm and 0.015 kg of Ni powder with an average particle size of 5 μm are loaded into the powder spraying device;

[0043] b) The powder spraying device is connected with high-purity argon gas, the argon gas pressure is set at 1.5MPa, and the argon gas flow rate is 400L / min;

[0044] c) 8.5kg of 1#Ag is melted in the graphite crucible of the intermediate frequency melting furnace;

[0045] d) The graphite nozzle of the powder spraying device is inserted into the silver melt, the distance between the nozzle head and the bottom of the crucible is 40mm, and the angle between the graphite nozzle and the insertion surface of the silver melt is 75°;

[0046] e) Turn on the powder spraying device and spray argon gas for 1 min according to the set pressure flow and pressure, Cd powder and Ni powder are sprayed into the Ag melt by argon gas, melt and diffuse to form AgCd10.5 alloy, the additive in AgCd10.5 alloy for Ni;

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Embodiment 2

[0049] a) 3 kg of Sn-In alloy powder with an average particle size of 50 μm, 0.15 kg of Bi powder with an average particle size of 50 μm, and 0.015 kg of Al powder with an average particle size of 10 μm are loaded into the powder spraying device;

[0050] b) The powder spraying device is connected to high-purity nitrogen, set the nitrogen pressure to 0.3MPa, and the nitrogen flow rate to 1000L / min;

[0051] c) 28.25kg of 1#Ag is melted in the graphite crucible of the intermediate frequency melting furnace;

[0052] d) The graphite nozzle of the powder spraying device is inserted into the silver melt, the distance between the nozzle head and the bottom of the crucible is 60 mm, and the angle between the graphite nozzle and the insertion surface of the silver melt is 45°;

[0053] e) Turn on the powder spraying device and spray nitrogen for 5 minutes according to the set pressure flow rate and pressure. Sn-In alloy powder, Bi powder and Al powder are sprayed into the Ag melt by ...

Embodiment 3

[0056] a) 2 kg of Sn powder with an average particle size of 20 μm and 0.1 kg of Ge-Sb-Te alloy powder with an average particle size of 30 μm are loaded into the powder spraying device;

[0057] b) The powder spraying device is connected to high-purity nitrogen, set the nitrogen pressure to 0.8MPa, and the nitrogen flow rate to 800L / min;

[0058] c) 15.3kg of 1#Ag is melted in the graphite crucible of the intermediate frequency melting furnace;

[0059] d) The graphite nozzle of the powder spraying device is inserted into the silver melt, the distance between the nozzle head and the bottom of the crucible is 50 mm, and the angle between the graphite nozzle and the insertion surface of the silver melt is 60°;

[0060] e) Turn on the powder spraying device and spray nitrogen gas for 3 minutes according to the set pressure flow rate and pressure. Sn powder and Ge-Sb-Te alloy powder are sprayed into the Ag melt by nitrogen gas, melt and diffuse to form AgSn11.5 alloy, AgSn11.5 all...

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Abstract

The invention discloses a method for improving distribution uniformity of a reinforced phase in a silver metal oxide electric contact material. A reinforced phase element is prepared into powder, a powder spraying device sprays the reinforced phase element powder into a silver solution through inert gas, vacancy concentration of the reinforced phase element is improved, the relative motion velocity of the reinforced phase element and the silver solution is increased, melting and diffusion velocities of the reinforced phase element in the silver solution can be increased effectively, and distribution uniformity of the reinforced phase in the silver substrate in the silver metal oxide electric contact material is finally improved. The technology can be applied to the production process of all silver metal oxide electric contact materials adopting internal oxidation technology or atomization technology, compared with the traditional internal oxidation technology and atomization technology, the method can significantly shorten uniformization time of the silver alloy smelting process, the volatilization amount of the low-melting-point reinforced phase element in the smelting process isreduced, and environment protection treatment cost is lowered.

Description

technical field [0001] The invention belongs to the field of preparation of electric contact materials, and specifically refers to a method for improving the uniformity of reinforcement phase distribution in silver metal oxide electric contact materials. Background technique [0002] Silver metal oxide materials occupy an important position in the entire electrical contact material system due to their excellent comprehensive electrical properties. The metal oxides and additives contained in the silver matrix in the silver metal oxide material belong to the strengthening phase for the silver matrix, and the arc erosion resistance and welding resistance of the silver matrix are improved by means of dispersion strengthening, so , the distribution uniformity of the reinforcing phase in the silver matrix has a decisive influence on the consistency and stability of the electrical properties of the contact material. [0003] In the smelting process of silver metal oxide electrical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/10C22C1/04C22C5/06C22C32/00
CPCC22C1/02C22C1/0466C22C1/1078C22C5/06C22C32/0015
Inventor 万岱缪仁梁郑泽成王银岗魏庆红郑雄伟邓子好张海金妹郭义万姜亚平
Owner FUDA ALLOY MATERIALS
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