公开(公告)号：US11584973B2

公开(公告)日：2023-02-21

申请号：US16642630

申请日：2018-09-13

申请人： POSCO

发明人： Doo-Jin Paik ,  Seul-Ki Park ,  Chung-Won Kim ,  Jung-Ki Kim ,  Sung-Il Kim ,  Hyeon-Seok Hwang ,  Je-Woong Lee ,  Jeong-Eun Kim ,  Cho-Rong Hong

IPC分类号： C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/40 ,  C23C16/06 ,  B32B15/01 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C21D1/26 ,  C25D3/22 ,  C25D3/44 ,  C25D5/36 ,  C25D7/06 ,  C23C30/00 ,  B32B15/18 ,  B32B15/04

摘要： Provided is a steel sheet having excellent image clarity after painting, including: carbon (C): 0.001% to 0.03%, silicon (Si): 0.001% to 0.35%, manganese (Mn): 0.05% to 2.2%, phosphorus (P): 0.003% to 0.1%, sulfur (S): 0.001% or 0.025%, aluminum (Al): 0.01% to 0.1%, nitrogen (N): 0.001% to 0.007%, and a remainder of iron (Fe) and inevitable impurities. The microstructure of the steel sheet mainly is ferrite phases. An R-cube texture of a surface layer of the steel sheet is 5% or less by area %.