发明名称 |
METHOD FOR MANUFACTURING GALVANIZED STEEL SHEET FOR HOT STAMPING, HOT-DIP GALVANNEALED STEEL SHEET FOR HOT STAMPING AND METHOD FOR MANUFACTURING SAME, AND HOT STAMPED COMPONENT |
摘要 |
Provided is a method for producing a plated steel sheet with high Si content for hot stamping, which is capable of suppressing the generation of unplated portions, while maintaining high bonding strength in a welded part in cases where a galvanized steel sheet containing a large amount of Si, namely, 0.7% or more of Si is used for hot stamping applications. In this production method, a hot-rolled pickled steel sheet or cold-rolled steel sheet containing 0.10-0.5% by mass of C, 0.7-2.5% by mass of Si, 1.0-3% by mass of Mn, and 0.01-0.5% by mass of Al is annealed in a reducing atmosphere and then plated, thereby producing a galvanized steel sheet for hot stamping. This method for producing a galvanized steel sheet for hot stamping is characterized in that the annealing is carried out within the range of 500 to 700° C. for 30 to 270 seconds. |
申请公布号 |
US2015125716(A1) |
申请公布日期 |
2015.05.07 |
申请号 |
US201314395173 |
申请日期 |
2013.04.23 |
申请人 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) |
发明人 |
Kojima Takeshi;Irie Hiroshi;Minowa Takeshi |
分类号 |
C21D9/46;C21D6/00;C22C38/54;C22C38/50;C22C38/06;C22C38/02;C22C38/00;C22C38/32;C22C38/28;C22C38/22;C22C38/20;C22C38/26;C22C38/24;B32B15/01;C23C2/06 |
主分类号 |
C21D9/46 |
代理机构 |
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代理人 |
|
主权项 |
1. A method for manufacturing a galvanized steel sheet, the method comprising:
annealing a hot-rolled pickled steel sheet or a cold-rolled steel sheet under a reducing atmosphere; and galvanizing the annealed steel sheet, wherein the steel sheet comprises C in a content of 0.10% to 0.5%; Si in a content of 0.7% to 2.5%; Mn in a content of 1.0% to 3%; and Al in a content of 0.01% to 0.5%, in percent by mass, and wherein the annealing is performed at a temperature of 500° C. to 700° C. for 30 to 270 seconds. |
地址 |
Kobe-shi JP |