ERW管预热焊接新工艺的开发

The Development of A New Type of Preheat Technology of ERW Pipe

日本住友公司开发了ＥＲＷ管预热焊接新工艺，即中频预热继而高频焊接，成功地解决了由于热输入不充分而引起的焊接缺陷，以及由于飞溅和内毛刺过大而使生产率下降的问题，并在和歌山钢厂采用。本文重点介绍了预热焊接新工艺的设备、原理和预热温度、频率的影响，连续加热的工艺特点和实际操作结果。

A new type of preheat technology of ERW pipe,i.e.M.F.preheat and H.F.welding, was developed in SMI of Japan.This technique could eliminate welding defect as a result of minor heat input and advance productivity as a result of splash and large burr. In this paper, principle,equipment and control factors of preheat technology are introduced.