本文对箱形梁火焰矫正残余应力进行了实测,并比较了火焰矫正加热后水冷与空冷对残余应力的影响。测试结果表明,火焰矫正引起的残余应力与焊接造成的残余应力有相同的地方,也存在着较大的差异,火焰矫正残余应力水平较低,当加热范围较宽时,加热中心线部位其横向(垂直于加热线方向)的应力全部为压应力,火焰矫正加热后,水冷比空冷造成的残余压应力更大。 In this paper, the residual stress of box beam flame correction was measured, and the effect of water cooling and air cooling on residual stress after flame straightening heating was compared. The test results show that the residual stress caused by flame straightening is the same as the residual stress caused by welding, and there is a big difference between them. The residual stress of flame straightening is lower. When the heating range is wider, (Perpendicular to the direction of the heating line) are all compressive stress. After the flame is rectified and heated, the residual compressive stress caused by water cooling is greater than air cooling.