在压力容器制造中焊接变形的控制是非常重要的。它不仅关系到压力容器或部件的外观质量、结构尺寸，更重要的是影响容器受力状况和密封性能。焊接变形控制不好，往往会使容器或部件报废或设备投入运行不久出现故障而给国家造成经济损失。因此，焊接变形的控制应引起压力容器制 Control of welding deformation in the manufacture of pressure vessels is very important. It is not only related to the appearance of the pressure vessel or component quality, structure size, more importantly, affect the container stress conditions and sealing performance. Welding deformation control is not good, often make containers or parts scrapped or equipment put into operation shortly after the failure and the country caused economic losses. Therefore, the welding deformation control should cause pressure vessel system