本文简明分析了焊接钢管在焊缝及热影响区焊接残余应力产生的原因、分布状态及其对钢管承压能力的有害影响。提出了通过施加内压(水压)的方式来改善残余应力分布状态,提高钢管承压能力的方法;指出了改善残余应力分布的一些工艺因素,并对其机理进行了初步探讨。 This paper briefly analyzes the causes, distributional state of welding residual stresses and their detrimental effects on the bearing capacity of welded steel pipes in the weld and heat-affected zone. The method of improving the distribution of residual stress and increasing the bearing capacity of steel pipe by applying internal pressure (water pressure) is proposed. Some technological factors for improving residual stress distribution are pointed out, and the mechanism is discussed.