| 摘要 |
PURPOSE:To economically produce a small-sized high strength product by heating and hot forging a cold compacted body of metal powder to increase the density and by subjecting the forged product to hot isostatic press forming. CONSTITUTION:Metal powder as starting material is cold compacted and the compacted body is heated and hot forged in closed dies so that the forged product has >=96% density ratio. The compacted body may be heated, cooled and reheated before the hot forging. The forged product is then subjected to hot isostatic press forming to eliminate the residual voids. Thus, the wear of the dies can be suppressed, compression to true density is enabled and a high density and high strength product can be produced at a low cost.
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