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应用小孔释放法对系列钢制压力容器手弧焊接接头的焊接残余应力进行测试 ,讨论了焊接残余应力的分布规律及其相关影响因素 ,对加载法消除焊接残余应力的效果进行了初步的验证。结果表明 ,焊接接头的应力不均匀性和不确定性是影响钢制压力容器安全性的关键 ,采用加载法可以有效地改善这种非均匀应力分布状况。
The welding residual stress of the hand steel arc welded joint of steel pressure vessel was tested by the method of small hole release. The distribution law of welding residual stress and the related influencing factors were discussed. The effect of loading method to eliminate welding residual stress was preliminarily verified . The results show that the stress inhomogeneity and uncertainty of welded joints are the key factors affecting the safety of steel pressure vessels. The loading method can effectively improve the non-uniform stress distribution.