Research results indicate the main reasons for the diamond film-coated tools breakage and desquamation are bigger cutting parameters, mechanical impact, alternative cutting load, frequent desquamation of the scrap nubbles etc. 研究结果表明,较大的切削用量、机械冲击、交变切削载荷及积屑瘤频繁脱落等是导致金刚石薄膜涂层刀具破损剥落的主要原因。