| 摘要 |
PURPOSE:To improve the hardness, corrosion resistance and wear resistance by mixing a specified weight percentage of high-speed steel powder with a specified weight percentage of powder of one or more kinds of hard substances such as hard carbides and by sintering the powdery mixture at a specified temp. under a specified pressure. CONSTITUTION:A powdery starting material for sintering is prepd. by mixing 50-90wt% high-speed steel powder with 50-10wt% powder of one or more kinds of hard substances selected among hard carbides, borides, nitrides, silicides, oxides, hard cermet, heat resistant hard alloys and wear resistant alloys. The starting material is sintered at 1,200-1,400 deg.C under 3-10ton/cm<2> pressure. A sintered body obtd. by this method has a composite sintered structure formed by sintering a large number of hard substance particles and high-speed steel particles in the gaps among hard substance particles, so the hardness, corrosion resistance and wear resistance are considerably improved.
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