Silver-base rare-earth alloy material and preparation method and application thereof

Abstract

The invention provides a silver-base rare-earth alloy material, which is characterized by comprising the following components in percentage by mass: 0.1 to 8 percent of Cu, 0.01 to 0.5 percent of Ni, 0.01 and 0.3 percent of Sm and the balance of Ag. By the silver-base rare-earth alloy material, the defect that the service life of the conventional silver-base composite material is reduced greatly due to unsuitability for high-temperature environment of a micro motor, the defect that materials are difficult to process due to substantial reduction of elongation of the materials caused by the addition of rare-earth elements in the silver-base composite material which is suitable for the micro motor and the like are overcome, so the invention provides a new silver-base rare-earth alloy material and a preparation method and application thereof. The silver-base rare-earth alloy material has the characteristics of high elongation, high recrystallization temperature, high hardness at high temperature, high abrasive resistance and the like, is suitable to be used as a sliding electric contact material, can be particularly used for manufacturing parts of a commutator of the micro motor and the like, and has the advantages of high quality and long service life at the high temperature of 70 DEG C.

Description

technical field [0001] The invention relates to a silver-based rare earth alloy material, a preparation method and application thereof. Background technique [0002] For a long time, Ag-Cu-based solid-solution-strengthened series alloys and Ag-Ni-based dispersion-strengthened series alloys have been formed in electrical contact materials. Among them, Ag-Cu alloy is the most widely used. However, in industrial atmospheres, especially in high temperature, high humidity and hydrogen sulfide-containing atmospheres, Ag-Cu alloys tend to form non-conductive sulfide films and oxide films on the surface, resulting in unstable contact resistance and reduced contact reliability. At the same time, due to the low copper content and the low recrystallization temperature of the alloy (about 260°C), the high temperature in the working environment of the motor can easily soften or even melt the commutator segments locally, which greatly accelerates the wear process. Moreover, the arc gene...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the fact that the existing silver-based composite materials are not suitable for the high-temperature environment of micro-motors, which greatly reduces the service life, or the silver-based composite materials suitable for micro-motors have a large elongation rate due to the addition of rare earth elements. decline, which is not conducive to material processing and other defects, a new silver-based rare earth alloy material and its preparation method and application are provided

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