低中高速硬态直角切削淬硬钢切屑试验研究  

Chips experimental study on cutting hard right angle of hardened steel

作　　者：沈浩[1] 阴俊[1] 唐林虎[2] 孙永吉[2] 吴春雨[1] 田勇[1] 

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050 [2]兰州工业学院甘肃省高校绿色切削加工技术及其应用省级重点实验室,甘肃兰州730050

出　　处：《制造技术与机床》2017年第1期139-142,共4页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金(51465028);甘肃省陇原青年创新人才扶持计划

摘　　要：针对干式硬态直角切削淬硬钢Cr12MoV(55±1HRC)形成锯齿形切屑,利用扫描电子显微镜(SEM)观察切屑的微观形貌,分析不同切削速度下锯齿形切屑的特点。研究结果表明:淬硬钢Cr12MoV切屑随切削速度的增加逐渐由带状切屑过渡到锯齿形切屑,进而再变成崩碎切屑;在正交切削过程中,剪切角与平均剪应变呈递增、递减区间相反的抛物线图像曲线变化趋势,且速度在v=250 m/min附近曲线出现拐点与极值。For serrated chips formed by dry hard rectangular cutting of hardened steel Cr12MoV,morphology using a scanning electron microscope（SEM） observation of cutting,under different cutting serrated chips characteristics.The results show that：with the increase in hardened steel chips cutting Cr12MoV gradually from ribbon cuttings to zigzag over the chip,which can then become chipping chips;in the orthogonal cutting process,the cutting angle and the average shear strain was increasing,decreasing range parabolic curve image opposite trend,and the inflection point appears in the value of the speed v = 250 m/min near the curve.

关 键 词：干式硬态切削 CR12MOV 剪切角 平均剪应变 锯齿形切屑 

分 类 号：TG501.1[金属学及工艺—金属切削加工及机床]