公开(公告)号：US07682467B2

公开(公告)日：2010-03-23

申请号：US11037159

申请日：2005-01-19

申请人： Tetsuo Soshiroda ,  Masaaki Miura ,  Tohru Shiogama

发明人： Tetsuo Soshiroda ,  Masaaki Miura ,  Tohru Shiogama

IPC分类号： C22C38/00

CPC分类号： C22C38/18 ,  C21D1/19 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/34 ,  C21D9/48 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

摘要： Disclosed is a high-strength hot-rolled steel sheet containing C in a range of 0.03 to 0.15 mass %, Mn in a range of 0.5 to 2 mass %, and Al in a range of 0.01 to 0.1 mass %, respectively, while controlling S to not more than 0.02 mass % (0% included), wherein the metallic structure thereof has a polygonal ferrite as the main phase, and contains martensite as a second phase, further containing P in a range of 0.030 to 0.08 mass %, and Cr in a range of 0.3 to 1.00 mass %, respectively, while controlling Si to not more than 0.1 mass % (0% included). Thus, a high-strength hot-rolled steel sheet superior in workability, and fatigue property, and excellent in surface quality is provided at a relatively low cost.

摘要翻译： 公开了一种含有0.03〜0.15质量％的C，Mn在0.5〜2质量％的范围内，Al分别为0.01〜0.1质量％的Al的高强度热轧钢板，同时控制 S为0.02质量％以下（含有0％），其中金属组织以多边形铁素体为主相，含有马氏体作为第二相，进一步含有P在0.030〜0.08质量％的范围内，以及 Cr分别为0.3〜1.00质量％的范围，同时将Si控制在0.1质量％以下（含有0％）。 因此，以相对较低的成本提供了加工性，疲劳特性优异，表面质量优异的高强度热轧钢板。

公开(公告)号：US20050155673A1

公开(公告)日：2005-07-21

申请号：US11037159

申请日：2005-01-19

申请人： Tetsuo Soshiroda ,  Masaaki Miura ,  Tohru Shiogama

发明人： Tetsuo Soshiroda ,  Masaaki Miura ,  Tohru Shiogama

IPC分类号： C21D9/46 ,  C21C5/00 ,  C21D7/13 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/38 ,  C22C38/58

CPC分类号： C22C38/18 ,  C21D1/19 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/34 ,  C21D9/48 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

摘要： Disclosed is a high-strength hot-rolled steel sheet containing C in a range of 0.03 to 0.15 mass %, Mn in a range of 0.5 to 2 mass %, and Al in a range of 0.01 to 0.1 mass %, respectively, while controlling S to not more than 0.02 mass % (0% included), wherein the metallic structure thereof has a polygonal ferrite as the main phase, and contains martensite as a second phase, further containing P in a range of 0.030 to 0.08 mass %, and Cr in a range of 0.3 to 1.00 mass %, respectively, while controlling Si to not more than 0.1 mass % (0% included). Thus, a high-strength hot-rolled steel sheet superior in workability, and fatigue property, and excellent in surface quality is provided at a relatively low cost.

摘要翻译： 公开了一种含有0.03〜0.15质量％的C，Mn在0.5〜2质量％的范围内，Al分别为0.01〜0.1质量％的Al的高强度热轧钢板，同时控制 S为0.02质量％以下（含有0％），其中金属组织以多边形铁素体为主相，含有马氏体作为第二相，进一步含有P在0.030〜0.08质量％的范围内，以及 Cr分别为0.3〜1.00质量％的范围，同时将Si控制在0.1质量％以下（含有0％）。 因此，以相对较低的成本提供了加工性，疲劳特性优异，表面质量优异的高强度热轧钢板。