公开(公告)号：US20180245176A1

公开(公告)日：2018-08-30

申请号：US15754659

申请日：2016-07-25

申请人： BAOSHAN IRON & STEEL CO., LTD.

发明人： Jun LI ,  Dechao XU ,  Hailing MU ,  Yusheng ZHAO ,  Yun-feng LIU

IPC分类号： C21D9/46 ,  B32B15/01 ,  C23C2/06 ,  C23C2/12 ,  C22C38/14 ,  C22C38/12 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00

CPC分类号： C21D9/46 ,  B21B1/22 ,  B21B2001/221 ,  B21B2001/225 ,  B21B2001/228 ,  B32B15/012 ,  B32B15/013 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C21D8/0278 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C22C18/04 ,  C22C21/10 ,  C22C30/06 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12

摘要： An aluminium-zinc-hot-dipped and colour-coated steel plate having a 600 MPa yield strength grade and a high elongation and a manufacturing method thereof, with the chemical components in mass percentage of a substrate of the steel plate being: 0.07-0.15% of C, 0.02-0.5% of Si, 1.3-1.8% of Mn, N≤0.004%, S≤0.01%, Ti≤0.20%, Nb≤0.060%, and the balance being Fe and other inevitable impurities, and meanwhile satisfying the conditions of: (C+Mn/6)≥0.3%; Mn/S≥150; Nb satisfying 0.01%≤(Nb-0.22C-1.1N)≤0.06% where no Ti is contained; Ti satisfying 0.5≤Ti/C≤1.5 where no Nb is contained; and 0.04%≤(Ti+Nb)≤0.26% where Ti and Nb are added in combination. The steel plate has a yield strength of ≥600 MPa, a tensile strength of ≥650 MPa, an elongation after fracture of ≥12%, a good strength and toughness and an excellent corrosion resistance.