FIELD: mechanical engineering. SUBSTANCE: apparatus is formed as solid body with working part made from hard alloy containing ferromagnetic binder introduced into surface layer of working part of solid body, with concentration of metal cobalt being at least 0.3% by weight, and layer thickness being at least 2.0 microns. Service life of working part of apparatus is increased by 6 times as compared to known construction. EFFECT: increased efficiency and service life, improved quality of worked products. 2 cl, 4 dwg, 2 tbl, 2 ex
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Authors
Dates
1999-06-10—Published
1998-06-04—Filed