本文用X射线法测定了喷丸起落架外筒焊缝影响区的残余应力,并从残余应力角度考察了起落架外筒现行工艺路线的优劣。测定结果表明,在相同构件上虽然所测方向和部位不同,但残余应力的分布、大小及符号基本相同。与前起外筒相比,喷丸处理在主起外筒上形成的残余压应力值较低。分析认为消除焊接残余拉应力的合理工序,是两种外筒均应采用焊后热处理,但应防止表面脱碳。 In this paper, the X-ray method was used to measure the residual stress in the weld zone affected by shot peening, and the advantages and disadvantages of the current process of the outer barrel of landing gear were investigated from the perspective of residual stress. The results show that although the measured direction and location are different on the same component, the distribution, size and symbol of residual stress are basically the same. The shot peening results in a lower residual compressive stress on the main outer cylinder compared to the front outer cylinder. Analysis that eliminate welding residual tensile stress of the reasonable process is that both outer cylinder should be used after the heat treatment, but should prevent the surface decarbonization.