FIELD: machine building.
SUBSTANCE: in composition particles are distributed by dimensions in region where particles have modal size, in region, where particles have size less, than modal, and in region where particles have size over modal. Also, according to the first version of the invention, particles are distributed by dimensions with gentle transition from the region where particles have modal size to regions with particles of bigger or smaller sizes. According to second version of the invention, particles are distributed by dimensions without a change between the region, where they have modal size and the region where they have size less, than modal, and also between the region where they have modal size and the region where particles have size bigger, than modal.
EFFECT: increased wear resistance of surface due to lack of breaks in distribution of particles.
18 cl, 5 dwg, 8 tbl
