发明名称 |
Metallic semi-finished product, processes for its preparation and its use |
摘要 |
The invention relates to a metallic semi-finished product based on iron and/or nickel and/or cobalt and containing 2 to 16% of aluminum, 12 to 30% of chromium and at least one highly reactive element X, in particular from the group consisting of the rare earth metals and/or their dispersed oxides. The characteristic feature of the invention is that metallic columnar crystals are formed at least in the surface region of the semi-finished product and columnar crystals consisting predominantly of aluminum oxide and/or chromium oxide grow out of the said metallic columnar crystals, the axes of the two types of columnar crystals being predominantly at right angles to the geometric surface of the semi-finished product.
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申请公布号 |
US4798631(A) |
申请公布日期 |
1989.01.17 |
申请号 |
US19870018545 |
申请日期 |
1987.02.25 |
申请人 |
THYSSEN AKTIENGESELLSCHAFT VORM AUGUST THYSSEN-HUTTE |
发明人 |
FLEISCHER, HANS-JOACHIM;LOHSCHEIDT, KLAUS;GOERRES, DIETER;BEHR, FRIEDRICH |
分类号 |
B22D11/06;B01J32/00;C22C19/05;C22C19/07;C22C38/18;C23C8/16;C23C8/18;C30B29/62;(IPC1-7):C21D9/00 |
主分类号 |
B22D11/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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