| 发明名称 |
HIGH-STRENGTH PLATED STEEL SHEET HAVING SUPERIOR PLATING PROPERTIES, WORKABILITY, AND DELAYED FRACTURE RESISTANCE, AND METHOD FOR PRODUCING SAME |
| 摘要 |
The present invention relates to a high-strength plated steel sheet having a plated layer on a surface of a base steel sheet, contains predetermined steel compositions, and includes, in order from a base steel sheet side of an interface between the base steel sheet and the plated layer: a soft layer having a Vickers hardness of 90% or less of a Vickers hardness of a t/4 portion of the base steel sheet, where t is a thickness of the base steel sheet, and a hard layer having a structure containing martensite and bainite as main components. The soft layer has an average depth D of 20 μm or more, an internal oxide layer has an average depth d of 4 μm or more and less than D. |
| 申请公布号 |
US2016160335(A1) |
申请公布日期 |
2016.06.09 |
| 申请号 |
US201414903158 |
申请日期 |
2014.07.02 |
| 申请人 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) |
发明人 |
IKEDA Muneaki |
| 分类号 |
C23C2/06;C21D9/46;C21D6/00;C21D8/02;C21D1/74;C22C38/38;C22C38/34;C22C38/28;C22C38/16;C22C38/14;C22C38/12;C22C38/08;C22C38/06;C22C38/04;C22C38/02;C22C38/00;C23C8/18 |
主分类号 |
C23C2/06 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A high-strength plated steel sheet having a hot-dip galvanized layer or an alloyed hot-dip galvanized layer on a surface of a base steel sheet, wherein
(1) the base steel sheet contains, by mass %,
C: 0.05 to 0.25%,Si: 0.5 to 2.5%,Mn: 2.0 to 4%,P: greater than 0% and less than or equal to 0.1%,S: greater than 0% and less than or equal to 0.05%,Al: 0.01 to 0.1%, andN: greater than 0% and less than or equal to 0.01%, a balance of the base steel sheet consists of an iron and inevitable impurities, (2) the base steel sheet includes, in order from a base steel sheet side of an interface between the base steel sheet and the plated layer,
an internal oxide layer containing at least an oxide selected from the group consisting of Si and Mn,a soft layer including the internal oxide layer and having a Vickers hardness of 90% or less of a Vickers hardness of a t/4 portion of the base steel sheet, where t is a thickness of the base steel sheet, anda hard layer having a structure containing martensite and bainite as main components, wherein the soft layer has an average depth D of 20 μm or more, the internal oxide layer has an average depth d of 4 μm or more and less than D, and the plated steel sheet has a tensile strength of 980 MPa or more. |
| 地址 |
Kobe-shi, Hyogo JP |
