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Method of preparing sheet silver tin oxide electrical contact material

A technology of electric contact material, silver tin oxide, which is applied in the direction of contacts, circuits, electric switches, etc., to achieve the effect of short production cycle, low production cost and uniform structure

Active Publication Date: 2011-06-08
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From these known manufacturing methods of silver tin oxide electrical contact materials, there are certain difficulties in the processing of materials with high oxide weight percentage content, and the material system is not perfect, so it is difficult to meet the increasing electrical requirements
Some of these manufacturing methods have environmental pollution during the manufacturing process

Method used

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  • Method of preparing sheet silver tin oxide electrical contact material
  • Method of preparing sheet silver tin oxide electrical contact material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment one: by 98% silver (percentage by weight), 2% tin (percentage by weight) as raw material, water atomization under 30MPa pressure condition, in the air through 12 hours internal oxidation tempering treatment, at 250MPa etc. Pressed into ingots under static pressure, sintered at 780°C for 8 hours, and then extruded into plates at a temperature of 750°C. After surface treatment and silver coating, the plates were rolled, punched, and processed into sheets. contacts.

Embodiment 2

[0030] Embodiment two: by 90% silver (percentage by weight), 9.7% tin (percentage by weight) as raw material, and add 0.3% bismuth, water atomization under 39MPa pressure condition, in the air through 8 hours internal oxidation adjustment Quality treatment, pressed into an ingot under an isostatic pressure of 260MPa, sintered at 800°C for 8 hours, and then extruded into a plate at a temperature of 780°C, the plate was surface treated with silver, rolled and punched Molded, processed into sheet contacts.

Embodiment 3

[0031] Embodiment three: by 90% silver (percentage by weight), 9.5% tin (percentage by weight) as raw material, and add 0.3% bismuth, 0.2% zinc, water atomization under 35MPa pressure condition, in air After 12 hours of internal oxidation and tempering treatment, it is pressed into an ingot under an isostatic pressure of 250MPa, sintered at 780°C for 8 hours, and then extruded into a plate at a temperature of 750°C, and the plate is surface treated with silver. After that, it is rolled, punched and formed, and processed into sheet contacts.

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Abstract

The invention relates to a production method of a material used for a piece-shaped silver tin oxide electric contact, the process flow of which is that the material prepared by silver, tin and additives according to a certain proportion is put into an intermediate frequency smelter for melting; a high pressure water atomizing device is adopted for high pressure alloy atomization; atomized alloy powder is dried and oxidated for modification; an isostatic pressing ingot is formed after isostatic pressing treatment; the ingot is agglomerated in a heating furnace; the agglomerated ingot is delivered into an extruding machine to extrude plates; the extruded plate is rolled and punched for shaping after surface treatment and silver restoring; The material property and electric property of the piece-shaped silver tin oxide electric contact material manufactured by the method can satisfy the use condition with high requirement.

Description

Technical field [0001] The present invention is a metal -based composite material technology field, especially a manufacturing method that meets the environmental protection electrical contact requirements. Background technique [0002] The manufacturing method of the publicity of silver oxygen oxide electrical contact materials is the following: the manufacturing method of the publicity of silver oxygen oxide electrical contact materials: (1) from silver, nano oxide tin oxide and rare earth elements and press 70 ~97 %, 3 to 22 %, 0.1 to 8 % of the weight content.The electrical preparation of this material includes nano -oxide tin oxide preparation of zinc oxide or titanium oxide, mixed and mixed metal oxide powder after mixed powder, sintering, squeezing, brushed, rivets or block contactsEssence(2) First, the silver tin is proportioned in a certain proportion, and then melted in the intermediate frequency furnace, and then uses a high -pressure water atomization equipment for a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C5/06H01H11/04H01H1/023
Inventor 柏小平王达武林万焕张明江刘立强颜小芳
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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