Method of preparing novel silver tin oxide silk electrical contact material

An electrical contact material, silver tin oxide technology, applied in the direction of contacts, circuits, electrical switches, etc., can solve the problems of imperfect material system, difficult to meet electrical requirements, difficult material processing, etc., and the particle size is easy to control. , Improve the processing performance and electrical performance, the effect of easy control of the process flow

Inactive Publication Date: 2008-06-18
FUDA ALLOY MATERIALS
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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

Method used

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  • Method of preparing novel silver tin oxide silk electrical contact material

Examples

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Embodiment 1

[0028] 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. It is pressed into an ingot under static pressure, sintered at 780°C for 8 hours, and then extruded into a wire at a temperature of 770°C. The extruded wire is processed into a finished product by hot drawing.

Embodiment 2

[0029] 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, pressing into ingot under isostatic pressure of 260MPa, sintering at 800°C for 8 hours, and then extruding into wire at 790°C, and processing the extruded wire by hot drawing to the finished product.

Embodiment 3

[0030] 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 38MPa pressure condition, in air through 12 Hours of internal oxidation conditioning treatment, pressed into ingot under isostatic pressure of 250MPa, sintered at 780°C for 8 hours, and then extruded into wire at 770°C, the extruded wire was heated The drawing method is processed to the finished product.

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Abstract

The invention relates to a novel preparing method of a material used for a silver tin oxide wire electric contact. The invention has a process 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 wires; the extruded wire is pulled and annealed to get a finished wire. The material property and electric property of the silver tin oxide wire electric contact material manufactured by the method can satisfy the use condition with high requirement.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials, in particular to a method for manufacturing a novel silver tin oxide wire electrical contact material that meets the requirements of an environment-friendly electrical contact. Background technique [0002] The known manufacturing methods of silver tin oxide electrical contact materials are as follows: (1) It consists of silver, nano tin oxide and rare earth elements and is composed of 70-97%, 3-22%, 0.1-8% by weight. The preparation of electrical contacts of this material includes the preparation of nano-tin oxide doped with zinc oxide or titanium oxide, the mixing of metal oxide powders and the powders after mixing are pressed, sintered, extruded, drawn, and made into rivets or bar contacts. . (2) First mix the silver and tin in a certain proportion and then melt it in the intermediate frequency furnace, then use high-pressure water atomization equipment to atomize the...

Claims

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Application Information

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IPC IPC(8): H01H11/04H01H1/023C22C5/06C22C1/02
Inventor 柏小平王达武林万焕张明江颜小芳刘杰召李国伟
Owner FUDA ALLOY MATERIALS
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