| 发明名称 |
LOW ALLOY STEEL |
| 摘要 |
A low alloy steel subjected to post weld heat treatment, containing, by mass percent, of C: 0.01 to 0.15%, Si: 3% or less, Mn: 3% or less, and Al: 0.08% or less, one or more kinds of elements selected from Ti, V and Nb: the range satisfying Formula (1), and the balance being Fe and impurities, wherein in the impurities, N: 0.01% or less, P: 0.05% or less, S: 0.03% or less, and O: 0.03% or less:;0.1×[C(%)]≦[Ti(%)]+[V(%)]+0.5×[Nb(%)]≦0.2 (1);where, the symbol of element in the formula represents the content (mass %) of each element.;In the alloy steel, a HAZ subjected to PWHT, especially short-time PWHT, has excellent hydrogen embrittlement resistance in wet hydrogen sulfide environments or the like. |
| 申请公布号 |
US2015047749(A1) |
申请公布日期 |
2015.02.19 |
| 申请号 |
US201214371044 |
申请日期 |
2012.12.17 |
| 申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
Hirata Hiroyuki;Omura Tomohiko;Kobayashi Kenji;Kawano Kaori;Tomatsu Kota;Ogawa Kazuhiro |
| 分类号 |
C21D9/50;C22C38/44;C22C38/42;C22C38/38;C22C38/28;C22C38/26;C22C38/24;C22C38/22;C22C38/06;C22C38/02;C22C38/32;C22C38/54;C22C38/00;C22C38/12;C22C38/14;C22C38/48 |
主分类号 |
C21D9/50 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A low alloy steel subjected to post weld heat treatment, containing, by mass percent, of
C: 0.01 to 0.15%, Si: 3% or less, Mn: 3% or less, and Al: 0.08% or less, one or more kinds of elements selected from Ti, V and Nb: the range satisfying Formula (1), and the balance being Fe and impurities, wherein in the impurities, N: 0.01% or less, P: 0.05% or less, S: 0.03% or less, and O: 0.03% or less:
0.1×[C(%)]≦[Ti(%)]+[V(%)]+0.5×[Nb(%)]≦0.2 (1) where, the symbol of element in the formula represents the content (mass %) of each element. |
| 地址 |
Tokyo JP |
