爆発成形法による高速度鋼粉末の固化

概要

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High speed steel powders were explosively shock-consolidated under the conditions, that (1) double tube method for cylindrical rod samples and (2) converging under-water shock wave method for rectangular bar samples. In case of the double tube method, excess melting was generated at central region and by the heat generated, many circumferential and transversal cracks were formed. The number of cracks were decreased by the arrangement that small powders were placed at the central region, but some transversal cracks were still generated. The converging under-water shock was able to achieve higher and longer pressure duration comparing with the other shock-consolidation techniques, and to give the uniform compression to the powders. Surface melting and intensive deformation of the powders were observed and cracks were fairly decreased in comparison with the case of the double tube geometry.
1994-02-01