摘要
通过扫描电子显微镜(SEM)观察和能量分散光谱(EDS)扫描分析,对PCBN刀具高速切削钛合金Ti6Al4V时的刀具损坏机理进行了研究,发现PCBN刀具损坏机理主要是机械磨损、氧化磨损和脆性破损。研究还证明了在不同的切削条件下,占主导地位的损坏机理有所不同,当切削用量处于低水平或切削初期和中期时,以机械磨损为主,而随着切削用量的增加或是切削后期,切削热增加,氧化磨损和脆性破损越来越突出。
Abstract ： Tool failure mechanism in high speed machining titanium alloy Ti6A14V used PCBN tool will be researched by micrographic experiments （SEM） and （EDS） and analysis. It is found that the primary tool failure mechanisms are me- chanical wear, oxidation wear and brittle fracture. It is proved that dominant failure mechanisms are different with different cutting conditions. When the cutting factors are all in the low level or in the early and middle cutting process, mechanical wear is the dominant failure mechanism. While with the increase of cutting factors or in the late cutting process, oxidation wear and brittle fracture are more and more salient due to the increase of the cutting heat.
出处
《工具技术》
2013年第2期26-29,共4页
Tool Engineering
基金
教育部基础研究项目(A1420060196)
国家自然科学基金(50575126)
国内访问学者基金支持项目
