车削钛合金时硬质合金刀具切削适应性研究  

Research on Cutting Adaptability of Cemented Carbide Tool in Dry Turning Ti-6Al-4V

作　　者：李慧玲[1] 郝兆朋[1] 范依航[1] 王东 王涛[1] 

机构地区：[1]长春工业大学机电工程学院,长春130012 [2]吉林省东元精密机械有限公司,吉林公主岭136100

出　　处：《煤矿机械》2016年第3期93-95,共3页Coal Mine Machinery

基　　金：国家自然科学基金项目(51505038);吉林省重点科技攻关项目(20150204054GX)

摘　　要：针对钛合金加工过程中刀具磨损严重,刀具材料对切削性能影响较大等问题,采用无涂层和涂层硬质合金刀具进行干式车削钛合金Ti-6Al-4V试验,利用扫描电镜和X射线能谱仪研究刀具磨损机理,并通过刀具磨损、切削力和切削温度来评价不同刀具材料对钛合金的切削适应性。结果表明,钛合金车削加工时,与涂层硬质合金刀具相比,细晶粒的无涂层硬质合金刀具磨损、切削力和切削温度均较小,使用寿命长,切削性能最好;Ti Al N和Al Cr N合金复合涂层刀具切削力和切削温度随切削速度的变化较小,研究结果有助于切削刀具材料的合理选用及刀具磨损控制。In machining titanium alloys, tool wear is serious and tool materials have great effects on cutting performance of cutting tool. The uncoated carbide tools and coated carbide tools were used to for the experiments of dry turning titanium alloy Ti-6Al-4V. A scanning electron microscopy （SEM）equipped with energy dispersive X-ray spectrometer （EDS） was used to study tool wear mechanism. The cutting performance of tools, which were made of different materials, was evaluated through the tool wear, cutting force and cutting temperature. The results showed that in turning Ti-6Al-4V, compared with coated carbide tools, tool wear, cutting force and cutting temperature of uncoated carbide tool with fine grain are lower. The uncoated carbide tools showed much longer tool life and better cutting performance. The variation of cutting force and cutting temperature with cutting speed are not obvious when using the composite coating （TiAlN and AlCrN） carbide tool. The results can help to choose tool material reasonably and control tool wear.

关 键 词：钛合金Ti-6Al-4V 硬质合金刀具 刀具磨损 切削力 切削适应性 

分 类 号：TG501.3[金属学及工艺—金属切削加工及机床]