GCr15钢内圆表面磨削淬硬层软化带的正交试验  

An Orthogonal Experiment to the Softening Zone of Grind-Hardening Layer on the Internal Surface of Steel GCr15

作　　者：高顺兴 刘菊东 黄松伟 GAO Shunxing;LIU Judong;HUANG Songwei(School of Mechanical and Energy Engineering,Jimei University,Xiamen 361021,China;Key Technology University Engineering Research Center of Marine Platform Support System in Fujian Province,Xiamen 361021,China;Engineering Training Center,Jimei University,Xiamen 361021,China)

机构地区：[1]集美大学机械与能源工程学院,福建厦门361021 [2]海洋平台保障系统关键技术福建省高校工程研究中心,福建厦门361021 [3]集美大学工程训练中心,福建厦门361021

出　　处：《集美大学学报（自然科学版）》2020年第5期364-369,共6页Journal of Jimei University：Natural Science

基　　金：国家自然科学基金项目(51676085);福建省自然科学基金项目(2018J01489);厦门市科技计划项目(3502Z20191022)。

摘　　要：为了研究GCr15钢内圆磨削表面淬硬层的硬度分布特征,进行径向切入式内圆表面磨削淬硬正交试验,并优化了磨削用量组合。结果表明:1)内圆磨削淬硬件的砂轮周向切入切出区域存在软化带,该软化带由砂轮径向切入区、周向切入过渡区和周向切出过渡区组成;2)磨削深度对软化带弧长的影响最为显著,工件进给速度对软化带弧长的影响显著,磨削速度对软化带弧长的影响一般显著;3)随着磨削深度的增大,软化带周向显微硬度分布曲线由“U”形转变为“W”形。当磨削用量组合为:磨削深度a p=0.3 mm,工件进给速度v w=0.20 m/min,磨削速度v s=30 m/s时,可以获得最小软化带弧长。Based on the grind-hardening orthogonal experiment on the internal surface in the radial plunge grinding way,the hardness distribution characteristics of the internal grind-hardening layer of the steel GCr15 was studied for obtaining the information about the optimal combination of grinding parameters.The results show that a softening zone exists in the wheel circumferential in-out incision zone of the workpiece.The softening zone is composed of a radial plunge zone,a circumferential engagement transition zone and a circumferential exit transition zone.The grinding depth has a remarkably significant effect on the arc length of softening zone,and the feed speed has a significant effect on the arc length of softening zone and the grinding wheel speed has a less pronounced effect on the arc length of softening zone.Furthermore,the distribution curve of the softening zone circumferential micro-hardness changes from“U”to“W”in shape as the grinding depth increases.To obtain the minimum arc length of softening zone,the optimum combination of grinding parameters determined in the experiment is as follows:the grinding depth is a p=0.3 mm,the feed speed of workpiece is v w=0.20 m/min,the grinding speed is v s=30 m/s.

关 键 词：GCR15钢 内圆磨削 正交试验 软化带 显微硬度 磨削用量 

分 类 号：TG580.64[金属学及工艺—金属切削加工及机床] TG156.33