强化机理人们从喷丸除锈的工艺中得到启示,利用弹丸流对零件表面进行连续的喷射锤击,使表面产生一层薄而均匀的塑性变形,可以提高整个零件的疲劳性能。取一块薄钢板,经喷丸后可发现:钢板表面由于塑性变形而发生体积膨胀,导致钢板朝被喷丸的一面弯曲凸起。假如用化学腐蚀方法除去这一变形层,钢板便恢复到原先的平直状态。可以推想,对于刚度很大的厚钢板,塑性变形层的体积膨胀受到限制,喷丸后一定会产生很大的压应力,其数值可接近材料的屈 Intensification Mechanism People get enlightenment from the process of shot peening and rust removal, and use the projectile flow to continuously spray and hammer the part surface to make the surface produce a thin and uniform plastic deformation, which can improve the fatigue performance of the entire part. Take a thin steel plate, after shot peening can be found: the surface of the steel plate due to plastic deformation volume expansion, leading to the side of the steel sheet was shot peen convex curved. If the chemical etching method to remove the deformation layer, the steel will be restored to the original flat state. It can be assumed that, for a very rigid steel plate, the volume expansion of the plastically deformed layer is limited, and a large compressive stress is sure to occur after the shot peening, and its value can be approximated by the buckling of the material