发明申请
US20180036830A1 ELECTRIC RESISTANCE WELDED STEEL PIPE HAVING IDENTIFIABLE SEAM PORTION AND METHOD FOR MANUFACTURING THE SAME
审中-公开
基本信息:
- 专利标题： ELECTRIC RESISTANCE WELDED STEEL PIPE HAVING IDENTIFIABLE SEAM PORTION AND METHOD FOR MANUFACTURING THE SAME
- 申请号：US15555401 申请日：2016-03-01
- 公开(公告)号：US20180036830A1 公开(公告)日：2018-02-08
- 发明人： Shinsaku KOKUBO , Kenichi IWAZAKI , Hiromichi HORI
- 申请人： JFE STEEL CORPORATION
- 申请人地址： JP Tokyo
- 专利权人： JFE STEEL CORPORATION
- 当前专利权人： JFE STEEL CORPORATION
- 当前专利权人地址： JP Tokyo
- 优先权： JP2015-040928 20150303
- 国际申请： PCT/JP2016/001098 WO 20160301
- 主分类号： B23K11/36
- IPC分类号： B23K11/36 ; B23K31/10 ; C23C22/12 ; B21C37/08 ; B21C37/30 ; B23K11/087 ; F16L9/17
摘要：
An electric resistance welded steel pipe having an identifiable seam portion and a method for manufacturing the same. The electric resistance welded steel pipe includes a steel pipe portion with a seam portion, which is formed by electric resistance welding, and a coating portion of zinc phosphate. The coating portion covers at least an outer surface side of the steel pipe portion. A part of the coating portion that is immediately above the seam portion forms a color difference portion that has a width W along a pipe circumferential direction of greater than or equal to 0.1 times a wall thickness of the pipe and less than or equal to the wall thickness of the pipe. The color difference portion has a visually identifiable color difference from the other parts of the coating portion.
公开/授权文献:
IPC结构图谱:
| B | 作业；运输 |
| --B23 | 机床；不包含在其他类目中的金属加工 |
| ----B23K | 钎焊或脱焊；焊接；用钎焊或焊接方法包覆或镀敷；局部加热切割，如火焰切割；用激光束加工 |
| ------B23K11/00 | 电阻焊接；用电阻加热方式的切割 |
| --------B23K11/36 | .辅助设备 |