公开(公告)号：US20230167519A1

公开(公告)日：2023-06-01

申请号：US17922626

申请日：2021-12-21

申请人： Hyundai Steel Company

发明人： Byoung Jin KIM ,  Chun ku Kang ,  YoungJu Park ,  Ha Young Yu ,  Min Ho Jang ,  Seong Kyung Han ,  Sung Yul Huh

IPC分类号： C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C23C2/40

CPC分类号： C21D8/0236 ,  C21D9/46 ,  C21D8/0226 ,  C21D8/0273 ,  C22C38/004 ,  C22C38/04 ,  C22C38/06 ,  C22C38/002 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C23C2/40 ,  C21D2211/008 ,  C21D2211/005

摘要： The present invention provides a dent-resistant cold-rolled steel sheet having excellent dent-resistance properties. According to one embodiment of the present invention, the dent-resistant cold-rolled steel sheet includes, by weight, carbon (C): 0.005% to 0.03%, manganese (Mn): 1.0% to 2.5%, aluminum (Al): 0.2% to 0.8%, sum of chromium (Cr) and molybdenum (Mo): 0.3% to 1.5%, sum of niobium (Nb) and titanium (Ti): 0.001% to 0.01%, phosphorus (P): greater than 0% to 0.02%, sulfur (S): greater than 0% to 0.01%, and the balance of iron (Fe) and other unavoidable impurities, wherein a yield strength (YP) of 195 MPa or greater, a tensile strength (ST) of 340 MPa or greater, elongation (El) of 33% or greater, and a bake hardening (BH) amount of 40 MPa or greater are satisfied.