单晶Ni3Al基高温合金微铣削表面粗糙度试验研究

摘要

为研究单晶高温合金的微铣削表面粗糙度,采用直径为0.8mm的双刃硬质合金微铣刀,对典型的单晶Ni3Al基高温合金IC10进行微尺度铣削的三因素五水平正交试验研究.通过极差分析找出主轴转速、进给速度、进给深度对微铣削表面质量影响的主次因素.通过优化获得理想的切削工艺参数组合,所获表面粗糙度为801 nm.对其切削机理和影响表面质量的原因进行深入的分析,其结果对单晶高温合金的微加工理论的机理揭示具有一定的指导意义.%Two-edged carbide alloy micro-milling tool with 0.8mm diameter was used to study mi-cro-milling surface roughness of Ni3Al-based superalloy.An orthogonal experiment of three factors and five levels was implemented to microscope milling of typical single crystal Ni3Al-based superalloy IC10.The influences of primary and secondary factors of spindle speed,feed rate,feed depth on micro-milling surface quality were found according to the range analysis.The ideal cutting process parameter combination was optimized and obtained,the surface roughness is as 801 nm.Its cutting mechanism and the reasons affecting the surface quality were analyzed.The test results have certain guiding sig-nificance to the microscope milling mechanism of single crystal superalloy.