发明申请
US20100018281A1 METHOD OF MANUFACTURING PLUG USED TO PIERCE AND ROLL METAL MATERIAL, METHOD OF MANUFACTURING METAL PIPE AND PLUG USED TO PIERCE AND ROLL METAL MATERIAL
有权
制造用于金属和金属材料的电极的方法，制造用于金属和金属材料的金属管和插入物的方法
- 专利标题： METHOD OF MANUFACTURING PLUG USED TO PIERCE AND ROLL METAL MATERIAL, METHOD OF MANUFACTURING METAL PIPE AND PLUG USED TO PIERCE AND ROLL METAL MATERIAL
- 专利标题（中）： 制造用于金属和金属材料的电极的方法，制造用于金属和金属材料的金属管和插入物的方法
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申请号： US12533390申请日： 2009-07-31
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公开(公告)号： US20100018281A1公开(公告)日： 2010-01-28
- 发明人: YASUYOSHI HIDAKA , Naoya Hirase , Yasuhiro Kouchi
- 申请人： YASUYOSHI HIDAKA , Naoya Hirase , Yasuhiro Kouchi
- 申请人地址： JP Osaka-shi
- 专利权人： SUMITOMO METAL INDUSTRIES, LTD.
- 当前专利权人： SUMITOMO METAL INDUSTRIES, LTD.
- 当前专利权人地址： JP Osaka-shi
- 优先权： JP2007-025985 20070205; JP2008-020129 20080131
- 主分类号： B21B23/00
- IPC分类号： B21B23/00 ; B21K5/00
摘要：
A plug material having a prescribed shape is prepared, the prepared plug material is thermally treated in a heat treatment atmosphere that contains at least 1.0 vol. % oxygen at a heat treatment temperature of at least 950° C. and less than 1050° C. and thus a plug having an oxide scale layer 30 on the surface is manufactured. According to the manufacturing method, pores PO that extend along the surface SF of the plug material are formed under outer scale layer 20 in the oxide scale layer 30, which allows cracks to be more easily propagated in the outer scale layer 20. Therefore, the outer scale layer 20 is more easily peeled off than the conventional one.
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