Abstract
The residual stress on X groove welding plate of high performance bridge steel 4MnNbq is analyzed. The X-ray diffraction method, hole drilling method and indentation method are respectively used to test the residual stress on welding line, heat-affected zone and base metal. The longitudinal and transversal residual stress are analyzed and compared. The results show that the stress along welding line direction is far larger than the transversal one and the stress on base metal are comparatively smaller than the welding line. The testing results of three methods match well, while the results of X-ray method and hole drilling method are much closer, the relative error of indentation method is comparatively larger.
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