| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing an electric resistance welded steel pipe by which defects in a seamed part which are generated by the generation of a spark are reduced. SOLUTION: The period of time when both end faces which are heated to a prescribed temperature with a work coil are exposed to the air is set to be≤0.07 s and a shape angle is set to be≥3.3°. COPYRIGHT: (C)2010,JPO&INPIT |
