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Silver-copper rare earth alloy material

A rare earth alloy, silver-copper technology, applied in the field of new silver-copper rare earth materials, can solve the problems of reduced contact reliability, unstable contact resistance, low hardness and wear resistance

Inactive Publication Date: 2007-09-05
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of unstable contact resistance, reduced contact reliability, low hardness and wear resistance of AgCu alloy

Method used

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Embodiment Construction

[0011] The purity of raw materials used in the present invention is: Ag≥99.99%, Cu≥99.99%, Sn≥99.95%, Ce≥99.95%.

[0012] Allowable impurity content (mass ratio) of the present invention: Fe≤0.002%, Pd≤0.002%, Sb≤0.002%, Bi≤0.002%.

[0013] A novel silver-copper rare earth material was prepared by the following process.

[0014] According to mass percentage (%): Sn 0.3~0.8, Ce 0.3~0.8, balance AgCu6 preparation raw material,

[0015] Vacuum argon protection smelting → ingot homogenization treatment at 700°C / 3h → hot rolling → surface treatment → intermediate rolling → intermediate heat treatment at 600-650°C / 1h (vacuum) → finish rolling to obtain new silver-copper rare earth materials.

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Abstract

A silver-copper rare-earth material consists of Sn 0.3-0.8%, Ce 0.3-0.8wt% and AgCu 6%. It has better abrasive and arc-ablation resistances, anti-sulfurization, anti-oxidation and anti-metal transfer performances, stable contact resistance and excellent hardness.

Description

technical field [0001] The invention relates to a silver-copper rare-earth material, in particular to a novel silver-copper rare-earth material for light-load and medium-load contacts. Background technique [0002] Compared with pure Ag, AgCu alloy has better wear resistance and welding resistance, and is widely used in light-load and medium-load circuits for general air circuit breakers, voltage controllers, telephone relays, contactors, and starters. contacts. However, in the industrial atmosphere of AgCu alloy, especially in high temperature, high humidity and atmosphere containing sulfur and hydrogen sulfide, non-conductive sulfide film and oxide film are easily formed on the surface, resulting in unstable contact resistance and reduced contact reliability. At the same time, due to the generally low copper content (<20%), its hardness and wear resistance are low. Contents of the invention [0003] The object of the invention is to provide a novel silver-copper rar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/08H01H1/023
Inventor 王健周世平李季杨富陶蒋传贵俞建树乔勋贺晓燕
Owner KUNMING INST OF PRECIOUS METALS