| 发明名称 |
HARDENED MARTENSITIC STEEL HAVING A LOW COBALT CONTENT, PROCESS FOR MANUFACTURING A PART FROM THIS STEEL, AND PART THUS OBTAINED |
| 摘要 |
A steel characterized in that its composition is percentages by weight: C=0.18-0.30% Co=1.5-4% Cr=2-5% Al=1-2% Mo+W/2=1-4% V=traces-0.3% Nb=traces-0.1% B=traces-30 ppm Ni=11-16% where Ni≧7+3.5 Al Si=traces-1.0% Mn=traces-2.0% Ca=traces-20 ppm Rare earths=traces-100 ppm if N≦̸10 ppm, Ti+Zr/2=traces-100 ppm where Ti+Zr/2≦̸10 N if 10 ppm<N≦̸20 ppm, Ti+Zr/2=traces-150 ppm O=traces-50 ppm N=traces-20 ppm S=traces-20 ppm Cu=traces-1% P=traces-200 ppm the remainder being iron and inevitable impurities resulting from the smelting. A process for manufacturing a part from this steel, and part thus obtained. |
| 申请公布号 |
EP2310546(B1) |
申请公布日期 |
2017.03.22 |
| 申请号 |
EP20090784484 |
申请日期 |
2009.07.08 |
| 申请人 |
AUBERT & DUVAL |
发明人 |
ROCH, François |
| 分类号 |
C21D1/32;C21D6/00;C21D6/04;C21D9/00;C21D9/28;C22C38/00;C22C38/02;C22C38/04;C22C38/06;C22C38/42;C22C38/44;C22C38/46;C22C38/48;C22C38/52;C22C38/54 |
主分类号 |
C21D1/32 |
| 代理机构 |
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代理人 |
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| 主权项 |
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