管类环焊缝热时效和振动时效去除焊接应力对比研究

Contrast Research of Heat Ageing and Platform VSR Ageing Removing Welding Stress for Pipe Girth Weld

采用X射线衍射法,对20﹟钢Φ159mm×8mm钢管、1Cr18Ni9Ti不锈钢Φ60mm×5mm钢管试件的环焊缝进行焊接应力测量,然后分别采用热时效和平台振动时效法去除焊接应力后,再次对试件进行应力测量,对比热时效和振动时效法去除焊接应力的效果,试验证明,热时效去除焊接应力的效果较好,平台振动法去除管类零件环缝的应力效果较差。

Through X-ray diffraction method, the welding stress of the 20 steel φ159mm×8mm pipe girth weld and the stainless steel 1Cr18Ni9Ti φ60mm×8mm pipe girth weld were measured, then thermal ageing and platform VSR were used to remove welding stress. The welding stress were measured again to compare the two methods on the effect of removing the welding stress. Tests show that thermal ageing is better to remove welding stress, while platform VSR has poorer effect on removing welding stress of the pipe girth weld.