Influence of welding sequence of surfacing welding on deformation of Cr13 facing plate

Based on the thermo elastic plastic finite element method, the calculation model of stress-strain field in surface of facing plate was established. Only model unilateral coupling was considered. And the stress-strain fields of facing plate in different welding sequences were calculated. The effect of welding sequence on deformation and residual stress of facing plate was analyzed. The results show that the different sequences result in deformation of guide vane bearing hole with different degree. The gaps between facing plate and horizontal plane around guide vane bearing hole are also varying. The highest residual stress locates in the margin of bolt hole, and the unidirectional stress takes on a sine distribution along the circle of the bolt hole in different sequences. Through comprehensive compare, it is found that welding sequence 3, in which the smaller deformation and the more balanced distribution of residual stress are generated, is beneficial to improve the reliability and safety of facing plate.