摘要
利用热丝化学气相沉积(HFCVD)法在Si3N4刀具上涂覆一层金刚石薄膜,用以对灰口铸铁进行加工。切削试验的主要参数:切削速率为500m/min、700m/min和900m/min,刀具进给量0.1mm/r、0.25mm/r和0.4mm/r,切削深度保持恒定为1mm。为了评估切削过程中的刀具性能,着重对刀具切削力进行分析,证实了切削力随着进给量的增加而显著增大。金刚石薄膜的存在使切削过程保持稳定,同时在刀具上观察到来自工件的铁和锰元素的黏附现象。切削试验是在配有三轴测力仪的数控机床上进行的,由国产软件采集并记录测试结果。通过配有X射线能谱仪的扫描电子显微镜分析刀具磨损并利用轮廓仪进行刀具表面分析。
Si3N4 tools were coated with a thin diamond fihn using a hot-filament chemical vapors deposition （HFCVD） reactor for machining grey cast irons. Turning tests were performed with a combination of cutting speeds of 500, 700 and 900m/min ; feed rates of 0. 1, 0. 25 and 0.4mm/r, and constant cutting depth of lmm. Cutting forces were analyzed, which were verified a significant increase with feed rate. It was observed the adhesion of iron and manganese from the workpiece to the tool. Tests were performed on a CNC lathe with a 3-axis dynamometer. Results were collected and registered by homemade software. ＇Fool wear analysis was achieved by a Scanning Electron Microscope （SEM） with an X-ray Energy Dispersive Spectroscopy （EDS） system. Surface analysis was performed by a profilometer.
出处
《机床与液压》
北大核心
2009年第11期45-48,共4页
Machine Tool & Hydraulics
关键词
高速切削
涂层
金刚石
刀具磨损
High speed machining
Coating
Diamond
Tool wear
