1. Welding power source: a heat source with more concentrated energy can be used, so that the relative heat input is reduced. For example, consumable electrode welding is better than manual arc welding, hot wire TIG welding is better than conventional consumable electrode welding, and laser, plasma, and electron beam welding are all welding methods that use concentrated energy heat sources to achieve small deformation.
2. Welding sequence: using a suitable welding sequence, such as symmetrical welding, can reduce welding deformation.
3. Welding reverse deformation: before welding, it is expected that what kind of deformation will occur after welding, and a certain amount of residual deformation in the opposite direction before welding will be made to weaken welding deformation.
4. Strong restraint during welding.
5. The welding process can effectively control welding deformation by hammering with welding or pre-setting tensile stress on thin plates.
6. Stress annealing can be used after welding to eliminate or reduce welding deformation (generally speaking, welding deformation cannot be completely eliminated, but only relatively speaking).
7. Of course, it is directly related to the welding material. The larger the linear expansion coefficient, the easier it is to cause larger deformation during welding. Therefore, it is also possible to select suitable welding materials according to requirements, change the structure of the welding joint, and thus change the welding deformation.
