FIELD: process engineering.
SUBSTANCE: invention relates to earth movers, particularly, to dredger mills. Composite body comprises cemented carbide and steel wherein carbon content corresponds to carbon equivalent Ceq = wt % + 0.3 (wt % of Si + wt % of P) less than 0.9 wt % but not exceeding 0.1 wt %.Transitional zone of cemented carbide/steel with thin phase features eta-phase thickness of 50-200 mcm. Iron-containing 0.5-2 mcm-width zone is present in cemented carbide nearby eta-phase zone and carbon-enriched zone in steel nearby eta-phase zone with width of 10 to 100 mcm.
EFFECT: higher wear resistance.
8 cl, 3 dwg, 3 ex
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