| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of molding a hard-to-work carbide base material represented by tungsten carbide (WC) and having high molting point and high hardness integrally with a metallic material and an integrally molded member thereby. SOLUTION: Low sintering temperature, low pressurizing force and high densification speed in powder metallurgy are attained by micronizing crystal grains of the carbide base material. The densification of a compression-molded body comprising the hardly workable carbide-based material such as tungsten carbide (WC) which is compression-molded on the surface of the metallic base material is performed at a temperature lower than that of a conventional one by 500°C or more by using the superplasticity phenomenon caused by the micronization of the crystal grains. As a result, the metal carbide-metal integrated molded material having high accuracy is manufactured without causing the plastic deformation in the base material side. COPYRIGHT: (C)2009,JPO&INPIT
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