公开(公告)号：US20180257122A1

公开(公告)日：2018-09-13

申请号：US15759185

申请日：2016-01-14

申请人： Hyundai Steel Company

发明人： Byung Gil Yoo ,  Seung Ha Lee ,  Hyeong-Hyeop Do ,  Chee Woong Song

IPC分类号： B21B3/00 ,  B21D22/20 ,  B21D37/16 ,  B21D53/88

CPC分类号： B21B3/00 ,  B21D22/20 ,  B21D22/208 ,  B21D37/16 ,  B21D53/88 ,  C21D8/04 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0473 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

摘要： A method for producing a molded article includes the steps of: preparing a first steel plate and a second steel plate. The first steel plate and the second steel plate are joined to each other, thereby preparing a joined steel plate. The joined steel plate is heated at a temperature between 910° C. and 950° C. The heated joined steel plate is then subjected to hot-press molding, thereby preparing an intermediate molded article; and cooling the intermediate molded article, wherein the first steel plate has a tensile strength (TS) higher than that of the second steel plate.