This book focuses on how to control welding deformation. The contents include the law of welding deformation and the calculation of welding bending deformation of beams and columns, the calculation of pre-arching of the web plate of box girders of welded plate structures, the method of reducing welding deformation

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 welded components at 650 degrees, insulation 20 ~ 40h

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

本发明属于残余应力加工变形控制技术领域，尤其涉及一种工件加工变形的控制方法。背景技术：加工变形主要由毛坯初始残余应力、装卡力、切削力和切削热和加工引入残余应力这四个因素造成