%0 Journal Article
%T 预应力淬硬磨削加工表面微观形貌仿真与实验
%A 邓延生
%A 宋建伟
%A 修世超
%A 王雨时
%J 东北大学学报（自然科学版）
%D 2017
%R 10.12068/j.issn.1005-3026.2017.02.019
%X 摘要 为了揭示预应力对磨削淬硬过程及表面微观形貌的影响机理，根据热弹塑性有限元理论，在不同大小的预应力作用下，以45钢试件为研究对象，使用DEFORM-3D进行单磨粒切削仿真，并结合预应力淬硬磨削实验，对等效应变、沟槽深度、表层微观组织及表面微观形貌进行分析.研究表明:施加预应力对热-机械等效应变影响较小，对微观组织转变影响明显，进而影响位错密度和晶粒体积，间接影响表面粗糙度;在预应力取值较小时，随着预应力增大表面沟槽深度减小，有利于减小表面粗糙度值，但在预应力超过某一数值后，会引起表面褶皱，反而使表面粗糙度数值增大.</br>Abstract：To reveal the effect of pre-stressing on grinding hardening process and micro-surface， single grain cutting simulations on test specimens made of 45 steel under action of different pre-stresses were carried out by using DEFORM-3D based on the thermal-elastic-plastic finite element theory. The equivalent strain， groove depth， surface layer microstructure as well as the micro-surface were analyzed by simulation and experiment of pre-stressed hardening grinding process. The results indicate that pre-stressing has little effect on thermal-mechanical equivalent strain， but has obvious effect on microstructure transformation which has indirect effect on surface roughness by affecting the dislocation density and grain size. As the pre-stress increases within a low range， the groove depth decreases and the surface roughness value reduces. However， once the pre-stress exceeds a certain value， surface fold appears and surface roughness value increases instead.
%K 预应力淬硬磨削
%K 等效应变
%K 沟槽深度
%K 表面粗糙度
%K 仿真与实验&lt
%K /br&gt
%K Key words： pre-stressed hardening grinding equivalent strain groove depth surface roughness simulation and experiment
%U http://xuebao.neu.edu.cn/natural/CN/abstract/abstract10124.shtml