1 Cr18 Ni9 Ti不锈钢锯齿切屑失稳试验研究∗

摘要

Cutting 1Cr18Ni9Tistainless steel has high cutting force and high temperature. chip prone to shear instability, resulting in serrated chip. By making the chip sample of different cutting speeds,measuring the chip jagged parameters and microhardness in different deformation zonesoft thechip,comparingchip deforma-tion under different cutting speeds toresearch 1Cr18Ni9Ti stainless steel chip jagged instability mechanism. Gain the chip deformation concentrated in shear slip belt, and the closer between segment,the greater the de-gree of deformation of the chip. Then by changing the feed rate and rake angle, analyze factors which may influence 1Cr18Ni9Ti stainless steel chip jagged for improvement to provide a theoretical basis for cutting stainless steel 1Cr18Ni9Ti.%1 Cr18 Ni9 Ti不锈钢切削时切削力大和温度高，切屑容易产生剪切失稳，产生锯齿形切屑。通过制作不同切削速度下的切屑试样，测量切屑锯齿化参数和切屑变形区不同部位的显微硬度，比较不同切削速度下切屑变形程度来研究1 Cr18 Ni9 Ti不锈钢切屑锯齿化失稳机理。得到切屑变形集中在剪切滑移带上，而且越靠近节段之间，切屑的变形程度越大。然后通过改变进给量和刀具前角，分析影响1 Cr18 Ni9 Ti不锈钢切屑锯齿化的影响因素，为改善1 Cr18 Ni9 Ti不锈钢切削提供理论参考。