公开(公告)号：US20180354008A1

公开(公告)日：2018-12-13

申请号：US15762821

申请日：2016-08-12

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： Yasuyoshi Hidaka ,  Yasuto Higashida ,  Yuichi Yamanari ,  Yuji Yamamoto ,  Tatsuya Miyai

IPC分类号： B21B25/00 ,  C22C38/52 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/00 ,  C21D6/00

CPC分类号： B21B25/00 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D9/00 ,  C21D9/0068 ,  C21D2211/001 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/52 ,  C22C38/54

摘要： A piercer plug with increased life and a method of manufacturing it are provided. The piercer plug 1 includes a tip portion 2 and a trunk portion 3 made of the same material as the tip portion 2 and continuous to the tip portion 2. The trunk portion 3 includes a cylindrical portion 5 having a hole used for attaching a bar. The tip portion 2 is harder than the cylindrical portion 5.

公开(公告)号：US11331703B2

公开(公告)日：2022-05-17

申请号：US15762821

申请日：2016-08-12

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： Yasuyoshi Hidaka ,  Yasuto Higashida ,  Yuichi Yamanari ,  Yuji Yamamoto ,  Tatsuya Miyai

IPC分类号： B21B25/00 ,  C22C38/04 ,  C21D6/00 ,  C21D9/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/42 ,  C22C38/44 ,  C22C38/52 ,  C22C38/54

摘要： A piercer plug with increased life and a method of manufacturing it are provided. The piercer plug 1 includes a tip portion 2 and a trunk portion 3 made of the same material as the tip portion 2 and continuous to the tip portion 2. The trunk portion 3 includes a cylindrical portion 5 having a hole used for attaching a bar. The tip portion 2 is harder than the cylindrical portion 5.