抛丸对A7N01铝合金表面残余应力的影响

Effect of shot blasting on the surface residual stress of A7N01 aluminum alloy

采用X射线衍射法对A7N01铝合金焊缝在不同参数组合下的表面残余应力进行测量。探究抛丸时间和频率两参数对A7N01铝合金焊缝表面残余应力分布的影响,通过试验得出:抛丸时间相同时,强度越大,表面残余压应力值越大;抛丸强度相同时,时间越长,表面残余压应力值越大。采用较小的抛丸强度,板材表面残余压应力的值波动较小,分布更均匀。在本次试验中,15Hz-2min为抛丸的最佳工艺。

X-ray diffraction method was used to measure the surface residual stress of A7N01 aluminum alloy welding seam under different parameter combinations.Explore the impact of shot blasting time and frequency on the surface residual stress distribution of A7N01 aluminum alloy welding seam.With the same blasting strength,the longer the blasting time,the greater the residual compressive stress.In this test,15hz-2min is the best shot blasting process.