Patent Number: 6,332,905

Title: High-strength metal solidified material and acid steel and manufacturing methods thereof

Abstract: The invention according to the present application provides a high strength solidification body by solidifying a starting metallic powder of iron and the like by means of plastic working using hydrostatic pressing, which is, for instance, a high strength high toughness steel material and the like having a superfine texture comprising a crystalline texture consisting of grains 5 .mu.m or less in average diameter, or preferably, 3 .mu.m or less in average diameter. Furthermore, the present invention provides a steel material included in the high strength solidification body, which contains oxide grain 0.2 .mu.m or less in diameter at a volume ratio of from 0.5 to 60%.

Inventors: Ootaguchi; Minoru (Ibaraki, JP), Wanikawa; Shuji (Ibaraki, JP), Muramatsu; Yuji (Ibaraki, JP), Tsuzaki; Kaneaki (Ibaraki, JP), Nagai; Kotobu (Ibaraki, JP), Hayashi; Toru (Ibaraki, JP)

Assignee: Japan as represented by Director General of National Research Institute for Metals

International Classification: B22F 3/18 (20060101); B22F 3/12 (20060101); B22F 3/20 (20060101); B22F 3/00 (20060101); C22C 33/02 (20060101); C22C 033/02 ()

Expiration Date: 12/25/2018