Impregnated sintered material for electrical contacts and method

Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles

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75200, 200264, B22F 300

Patent

active

041537556

ABSTRACT:
An impregnated sintered material for making electrical contact members which have a low fusing force and little burning in which a powder mixture of W, Ag and/or Cu, a wetting promoting metal, and 2 to 5 percent by weight graphite is granulated thermically, and another 1 to 6 percent by weight graphite admixed to the granules, after which the mixture is compacted to form a skeleton and impregnated with Ag and/or Cu. The carbon contained in the finished material is partly in bound form as WC and partly free carbon in a 1:5 to 5:1 ratio.

REFERENCES:
patent: 2289708 (1942-07-01), Jackson
patent: 3489530 (1970-01-01), Schreiner
patent: 3610859 (1971-10-01), Schreiner
patent: 3821505 (1974-06-01), Wood

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