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METHODS OF BORONIZING SINTERED BODIES AND TOOLS FOR COLD FORMING OPERATIONS AND HOLLOW WEAR PARTS WITH BORONIZED SINTERED BODIES
METHODS OF BORONIZING SINTERED BODIES AND TOOLS FOR COLD FORMING OPERATIONS AND HOLLOW WEAR PARTS WITH BORONIZED SINTERED BODIES
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机译:具有硼化烧结体的硼化烧结体和用于冷成型操作的工具和中空磨损部件的方法
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摘要
Provided is a wear resistant, sintered body made of a binderless carbide, cermet or cemented carbide, e.g., WC, W2C and/or eta-phase, with a grain size less than 6.0 μm, and less than 6% binder phase (e.g., Co—Ni—Fe). At least some working surfaces of the sintered body are surface treated with a boron yielding method including applying a low viscosity liquid medium having boron or aluminum content and heating at 1200° C. to 1450° C. under a pressure less than atmospheric pressure or a hydrogen containing atmosphere to from a hardness gradient with an increased hardness of the treated working surfaces of at least 50 to 200 HV5 and favorable compressive stresses in a surface zone that gives a tougher working surfaces of the boronized sintered bodies.
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