摘要本试验在一定切削条件下对42CrMo钢进行干切削,研究刀具累计加工1 035 s 过程中前后刀面的磨
损形貌。试验结果表明:累计加工时间T从0 增加到1 035 s 的过程中,刀具前刀面参与切削的区域亮度增加,
磨损区域增大;当加工时间T为1 035 s 时,刀具前刀面磨损明显,出现颜色较深面磨损区域、亮度较高的部分
刀具涂层材料磨损区域、磨粒磨损明显的磨损区域。加工时间T从0 增加到435 s 的过程中,刀具后刀面出现
明显的磨损带,涂层材料磨损带逐渐增大。加工时间T从435 s 增加到1 035 s 的过程中,磨损带缓慢增大,出
现基体磨损现象,随着磨损时间延长,基体磨损逐渐增大。当加工时间T从48 s 增加到1 035 s,已加工表面粗
糙度Ra由3.46 μm逐渐增大到3.91μm。
Abstract:In this experiment,42CrMo steel was cutted under certain cutting conditions,and the wear morphology
of the tool rake and tool flank surfaces during 1 035 s machining was studied. The results show that the brightness
of the cutting area and the wear area of the tool rake face increase when the cumulative processing time T increases
from 0 to 1 035 s. When the processing time T is at 1 035 s,the tool rake face wear is obvious,and there
are dark wear area,high brightness part of tool coating material wear area and obvious abrasive wear area. When
the processing time T increases from 0 to 435 s,obvious wear band appears on the tool flank face,and the wear
band of coating material increases gradually. When the processing time T increases from 435 s to 1 035 s,the wear
band increases slowly and the tool substrate material wear occurs. With the increase of wear time,the tool substrate
material wear increases gradually. When the processing time T increases from 48 s to 1 035 s,the surface
roughness Ra increases from 3.46 μm to 3.91 μm.