Non-magnetic steel for drill collar having superior corrosion resistance and high strength |
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| 申请号 | JP25190884 | 申请日 | 1984-11-30 | 公开(公告)号 | JPS61130464A | 公开(公告)日 | 1986-06-18 |
| 申请人 | Nippon Steel Corp; | 发明人 | NAKAZAWA TAKANORI; SUZUKI TORU; SAKAMOTO TORU; YAMAUCHI ISAMU; | ||||
| 摘要 | PURPOSE: To improve stress corrosion cracking resistance, by incorporating prescribed percentage of Si, Mn, Ni, Cr, Al, Ti, and Ca and by limiting the amounts of C and N to the prescribed percentage or less. CONSTITUTION: The titled non-magnetic steel consists of, by weight, ≤2% Si, ≤2% Mn, 25W40% Ni, 18W30% Cr, 0.1W1.5% Al, 1.5W3% Ti, 0.0005W0.02% Ca, ≤0.015% C, ≤0.01% N, and the balance Fe. This steel excels in corrosion resistance, especially in stress corrosion cracking resistance and, moreover, the homogeneity of material can be secured. COPYRIGHT: (C)1986,JPO&Japio |
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