标题：Surface integrity and fatigue strength of hard milled surfaces
作者：Li, W. ;Guo, Y.B. ;Barkey, M.E. ;Guo, C. ;Liu, Z.Q.
作者机构：[Li, W. ;Guo, Y.B. ] Dept. of Mechanical Engineering, University of Alabama, Tuscaloosa, AL 35487, United States;[Guo, C. ] United Technologies Resear 更多
会议名称：ASME 2011 International Manufacturing Science and Engineering Conference, MSEC 2011
会议日期：13 June 2011 through 17 June 2011
来源：ASME 2011 International Manufacturing Science and Engineering Conference, MSEC 2011
关键词：Endurance limit; Flank wear; Hard milling; Surface integrity; Tool steels
摘要：Tool flank wear during hard milling adversely affects surface integrity and, therefore, fatigue strength of machined components. Surface integrity and machining accuracy deteriorate when tool wear progresses. In this paper, surface integrity and its impact on endurance limit of AISI H13 tool steel (50 ± 1 HRC) by milling using PVD coated tools are studied. The evolutions of surface integrity including surface roughness, microhardness and microstructure were characterized at three levels of tool flank wear (VB = 0, 0.1mm, 0.2mm). At each level of tool flank wear, the effects of cutting speed, feed, and radial depth-of-cut on surface integrity were investigated respectively. Fatigue endurance limits of the machined surfaces at different reliability levels were calculated and correlated with the experimentally determined fatigue life. The good surface finish and significant strain-hardening on the machined surfaces enhance endurance limit, which enables machined components have a fatigue life over 106 cycles. Copyright © 2011 by ASME and United Technologies Corporation.