Technical features: 1. A method for stress relief of a large welded structural member, the large welded structural member (1) comprising a first plate member (11) and a second plate member (12) which are welded and fixed

Post-weld stress relief treatment: 1, the overall heat treatment: the degree of stress relief is mainly determined by the composition of the material, organisation, heating temperature and holding time. Low carbon steel and some low alloy steel welding components at 650 degrees, insulation 20 ~ 40h, can basically eliminate all residual stresses