在冶金建设方面越来越多的采用焊接金属结构,特别是随着氧气炼钢的发展,用焊接办法施工制造的球形容器普遍采用。因而迫切需要了解焊后残余应力的大小和分布情况。这是因为焊接引起收缩残余应力对焊接构件的许用应力有很大关系。残余应力的大小和分布的不同,它对焊接构件的破裂、疲劳破坏、应力腐蚀等 In the metallurgical construction more and more use of welded metal structure, especially with the oxygen steel, welding methods used to construct spherical containers commonly used. Therefore, it is urgent to understand the size and distribution of residual stress after welding. This is because the welding shrinkage caused by residual stress on the allowable stress of welded components have a great relationship. Residual stress, the size and distribution of different, it welded components of the rupture, fatigue failure, stress corrosion, etc.