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AssigneesJapan as represented by Director General of National Research Institute for Metals, Kawasaki Steel Corporation
InventorsMinoru Ootaguchi, Shuji Wanikawa, Yuji Muramatsu, Kaneaki Tsuzaki, Kotobu Nagai, Toru Hayashi
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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 μm or less in average diameter, or preferably, 3 μm 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 μm or less in diameter at a volume ratio of from 0.5 to 60%.
A high strength metallic solidification body which is characterized by being a solidification body of a starting metallic powder containing iron or titanium as the principal component and having a super fine texture comprising a crystalline texture consisting of grains 5 μm or less in average grain diameter.
An oxygen steel which is a steel material in which oxide grains 0.2 μm or less in diameter is dispersed 0.5 to 60% by volume.
A production method for a high strength metallic solidification body, which comprises solidifying a starting metallic powder containing iron or titanium as the principal component by means of plastic working using hydrostatic pressing, thereby producing a metallic solidification body having a superfine texture comprising crystalline texture consisting of grains 5 μm or less in average diameter.
Dependencies are inferred from the claim text.