In this paper the HAZ weld thermal cycles of the welding by both sides submerged arc welded steel pipe were reproduced by the dislocation overlap weld method.
采用焊道错位叠加方法，再现了螺旋管双面埋弧焊制管过程中内、外焊焊接热影响区(HAZ)的焊接热循环。
A particular device of location and compaction for welding by one side in shape by both sides was designed according to the enterprises requirement in steel plates butt joint.
针对某企业需求的平板对接，为解决大型钢板焊接不易翻转的难题，设计了一种单面焊双面成形定位压紧小车。
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