金属切削加工和磨削加工可产生金属表面的损伤,其损伤可引起金属表面特性和金属表层特性的变化.金属表面特性是指表面粗糙度、波纹、形状(公差)、显微缺陷(裂纹、凹坑等);表层特性包括表面残余应力、热影响层的显微组织变化、硬度及塑性变化等.有资料表明,选用不同的切削加工工具及不同的切削工艺进行钛材的切削加工,可使钛材的表面粗糙度、表面残余应力和疲劳强度有所不同.在Ti—6Al—4V钛 Metal cutting and grinding can cause damage to the metal surface, the damage can cause changes in the surface properties of the metal and the surface characteristics of the metal.Metal surface properties refers to the surface roughness, ripple, shape (tolerance), micro-defects (cracks, Pits, etc.); surface properties include surface residual stress, heat-affected layer microstructure changes, hardness and plasticity changes, etc. Some data show that the use of different cutting tools and different cutting processes for titanium machining, So that the titanium surface roughness, surface residual stress and fatigue strength are different in the Ti-6Al-4V titanium