硫复合系易切钢中夹杂物与易切削机理的研究  

The Relationship between Inclusion and Free-Cutting Mechanism of Resulphurized Composite Free Cutting Steel

作　　者：娄德春[1] 崔昆[1] 吴晓春[1] 吴秀英[1] 贾云昆 

机构地区：[1]华中理工大学,洛阳北方摩托车厂

出　　处：《机械工程材料》1996年第5期27-30,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金

摘　　要：对Ｓ系、Ｓ－Ｃａ系、Ｓ－ＲＥ系及Ｓ－ＲＥ－Ｃａ系易切削钢在不同切削速度下的易切削机理进行了较系统的研究。实验结果表明，在低速（３５ｍ／ｍｉｎ）切削时，刀具主要为后刀面磨损，夹杂物的形态是影响切削性能的主要因素；而高速（１２０～１６０ｍ／ｍｉｎ）切削时，刀具主要失效形式是前刀面的扩散（即月牙洼）磨损，此时夹杂物的成分对切削性能影响甚大。与其他三类易切削钢比，高速切削时，Ｓ－ＲＥ－Ｃａ系钢有较佳的切削性能，因为它能在前刀面上的形成保护膜。In this paper, the effects of inclusions on free-cutting mechanism of resulfurized composite free-cutting steel were investigated. The experimental results showed that, at low cutting speed (35m/min), the main wear failure took place on the flank face of tool and the effect of the shape of inclusion on the machinability of steel was the primary factor i while at high cutting speed (120￣160m/ min),the diffusion wear (crater wear) was the dominant failure and the composition of inclusions (free-cutting phases) was the key factor on the machinability of steel.A protective film that could prevent diffusion wear was formed on the rake face of YT15 tool when machining S-RE-Ca composite freecutting steel at high cutting speed.

关 键 词：易切削钢 夹杂物形态 切削试验 

分 类 号：TG506.7[金属学及工艺—金属切削加工及机床]