Platinum alloy electrical contact material

A technology of electrical contact materials and platinum-based alloys, applied in the direction of contact materials, etc., can solve problems such as contact welding, protrusions or pits, affecting the reliability and electrical life of the overall components

Inactive Publication Date: 2004-11-17
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, long-term use has found that PtIr alloy electrical contact materials have obvious deficiencies. During the working process, severe electrical erosion and metal transfer will occur on the surface, showing protrusions or pits, which will cause welding between contacts and cause device failure. , which seriously affects the reliability and electrical life of the overall components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] According to the composition range of platinum-based alloy electrical contact material by weight percentage: Ir5.0-30.0, Ru1.0-10.0, 0.1-2.0 any one of La, Sm, Y, and the balance is Pt. Weigh the required raw materials and place them in an intermediate frequency furnace at 1800-2000°C at 1×10 -3 Pa vacuum melting, cooling ingot. The alloy ingots are made into sheets, rods or wires by mechanical cold treatment measures such as cold forging, cold rolling, and cold drawing. In the process of mechanical cold treatment, when the cross-sectional deformation of the alloy sheet, rod or wire reaches 50-60%, heat-treat the obtained sheet, rod or wire at any temperature within the range of 600-1300°C for 0.5-1.0 hours , that is, semi-finished products of platinum-based alloy electrical contact materials are obtained, which can be applied to actual workpieces after subsequent rolling or drawing.

[0014] The chemical composition and physical and mechanical properties of the plati...

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PUM

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Abstract

The invention discloses a platinum based alloy and its preparing process, wherein the platinum based alloy comprises the constituents by wt% of Ir 5.0-25.0, Ru 1.0-10.0, 0.1-2.0% of La, Sm, or Y, and balancing Pt. The preparation process includes, disposing each element of Pt, Ir, Ru, La (Sm, Y) according to the alloy composition requirement, alloying in vacuum smelting furnace, fabricating into sheet material or shredded material through forging, thermal treatment, rolling or drawing.

Description

technical field [0001] The invention relates to a platinum-based alloy electrical contact material and a preparation method thereof. Background technique [0002] Metal platinum has a high melting point, high boiling point and low vapor pressure, so it has excellent resistance to welding and arc burnout as an electrical contact material. At the same time, platinum has good chemical stability, and it does not oxidize, sulfide, or corrode in the atmosphere and corrosive atmosphere. Therefore, platinum-based electrical alloys have stable and reliable electrical contact performance in the field of weak electricity. However, due to the high price of platinum, it is generally only used in occasions that require high reliability and working conditions that are prone to electrical erosion. [0003] Platinum-iridium alloy: PtIr 5 , PtIr 10 , PtIr 15 , PtIr 20 , PtIr 25 , with high melting point (>1700℃), high hardness (Hv>150), good corrosion resistance, stable contact r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/04H01H1/02
Inventor 谢明陈江陈力符世继李汝民段云喜曾荣川杨有才张健康黎玉盛刘莉
Owner KUNMING INST OF PRECIOUS METALS
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