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Technique for preparation of novel silver zinc oxide contact material

A silver-zinc oxide and contact material technology, applied in the direction of contacts, electrical components, electric switches, etc., can solve the problems of difficult to meet the requirements of high current use, high requirements for oxidation equipment, and short service life of materials, so as to improve processing Performance and electrical performance, easy control of process flow, and low production cost

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

The metallographic structure of the product manufactured by the internal oxidation process is uneven, and there is a zinc-poor area, resulting in a short service life of the material and high requirements for oxidation equipment
The metallographic structure of the products manufactured by the powder metallurgy process is uneven, the density is low, and it is difficult to meet the requirements of high current use

Method used

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  • Technique for preparation of novel silver zinc oxide contact material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment one: by 94% silver (percentage by weight), 6% zinc (percentage by weight) as raw material, water atomization under 30MPa pressure condition, in the air through 7 hours internal oxidation conditioning treatment, in 230MPa 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. Or extruded into wire at a temperature of 760°C, the extruded wire is drawn, annealed and processed into a finished wire, which is used for rivets and profile production.

Embodiment 2

[0029] Embodiment two: by 90% silver (percentage by weight), 9.7% zinc (percentage by weight) as raw material, and add 0.3% bismuth, water atomization under 39MPa pressure condition, in the air through 8 hours of internal oxidation conditioning 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. Or extruded into wire at a temperature of 790°C, the extruded wire is drawn, annealed and processed into a finished wire, which is used for the production of rivets and profiled materials.

Embodiment 3

[0030] Embodiment three: it is characterized in that: by 90% silver (percentage by weight), 9.5% zinc (percentage by weight) as raw material, and add 0.3% tin, 0.2% copper, water atomization under 35MPa pressure condition, in After 12 hours of internal oxidation and conditioning treatment in the air, it is pressed into an ingot under an isostatic pressure of 250MPa, sintered at 780°C for 8 hours, and then extruded into a sheet at a temperature of 790°C, and the sheet is surface treated. After compounding silver, it is rolled, punched and formed, and processed into sheet contacts. Or extruded into wire at a temperature of 800°C, the extruded wire is drawn, annealed and processed into a finished wire, which is used for the production of rivets and profiled materials.

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Abstract

The invention relates to a novel preparing process of a material used for a silver zinc oxide contact. The invention has a process that a material prepared by silver, zinc 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 equal static ingot is formed after equal static treatment; the ingot is agglomerated in a heating furnace; the agglomerated ingot is delivered into an extruding machine to extrude plates or wires; the extruded plate is rolled and punched for shaping after surface treatment and silver restoring; the extruded wire is pulled and annealed to get a finished wire which is used for making rivets or different shape materials. The silver zinc oxide contact material prepared by the process has uniform metallographic structure, high density and good machining performance.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, in particular to a preparation process of a silver-zinc oxide electric contact material meeting the requirements of an environment-friendly electric contact. Background technique [0002] The manufacturing method of known silver-zinc oxide electric contact material has following several: (1) silver ingot, zinc and additive are placed in smelting furnace and smelted and cast ingot, processed into chips, high temperature and high pressure oxidation obtains silver-zinc oxide as The basic mixed-phase material is crushed by machining, and the debris is pressurized in a steel mold, extruded into strips at high temperature, and then drawn to obtain wire products based on silver zinc oxide and indium oxide. (2) Put silver ingots, zinc and additives in a smelting furnace to melt and cast ingots, extrude them into plates, plate materials are coated with silver, rolled and punched in...

Claims

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Application Information

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