发明名称 |
QUENCHED STEEL SHEET HAVING EXCELLENT STRENGTH AND DUCTILITY AND METHOD FOR MANUFACTURING SAME |
摘要 |
Disclosed are a quenched steel sheet and a method for manufacturing the same. The quenched steel sheet according to an aspect of the present invention contains, in terms of wt %, C: 0.05˜0.25%, Si: 0.5% or less (excluding 0), Mn: 0.1˜2.0%, P: 0.05% or less, S: 0.03% or less, the remainder Fe, and other unavoidable impurities, wherein a refined structure of the steel sheet comprises 90 volume % or more of martensite with a first hardness and martensite with a second hardness. |
申请公布号 |
US2016348207(A1) |
申请公布日期 |
2016.12.01 |
申请号 |
US201315101384 |
申请日期 |
2013.12.24 |
申请人 |
POSCO |
发明人 |
PARK Kyong-Su;JANG Jae-Hoon |
分类号 |
C21D9/46;C21D1/18;C22C38/00;C21D8/02;C22C38/04;C22C38/02 |
主分类号 |
C21D9/46 |
代理机构 |
|
代理人 |
|
主权项 |
1. A quenched steel sheet comprising, by wt %, carbon (C): 0.05% to 0.25%, silicon (Si): 0.5% or less (with the exception of 0), manganese (Mn): 0.1% to 2.0%, phosphorus (P): 0.05% or less, sulfur (S): 0.03% or less, iron (Fe) as a residual component thereof, and other unavoidable impurities,
wherein the quenched steel sheet includes 90 volume % or more of martensite having a first hardness and martensite having a second hardness as a microstructure of the steel plate. |
地址 |
Pohang-si, Gyeongsangbuk-do KR |