预应力淬硬磨削工件表面层质量试验研究  

Experimental Study on Surface Layer Quality of Pre-stressed Grind-hardening Parts

作　　者：白斌[1,2] 修世超[1] 张修铭[1] 

机构地区：[1]东北大学,沈阳110819 [2]沈阳工程学院,沈阳110136

出　　处：《中国机械工程》2016年第12期1579-1584,1590,共7页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51375083);沈阳市科技计划资助项目(F13-316-1-59)

摘　　要：从抗疲劳制造与绿色制造的观念出发,融合预应力磨削与磨削淬硬技术原理,提出了将残余应力控制、表面淬火及磨削三者集成于一体的预应力淬硬磨削技术理论与方法。对45钢试件进行了预应力淬硬磨削加工试验,以工件淬硬层表面残余应力、硬度及粗糙度为研究对象,与相同条件下的磨削淬硬工艺试验结果进行了对比分析。结果表明:预应力淬硬磨削工艺可增大工件表面残余压应力,减小拉应力,其工件表面残余应力状态优于磨削淬硬工艺;预应力淬硬磨削工件表面硬度可以达到基体硬度的3倍左右,而工件表面粗糙度小于磨削淬硬工艺工件表面粗糙度。因此,在相同的加工条件下,预应力淬硬磨削工艺比磨削淬硬工艺具有更好的抗疲劳性、耐腐蚀性及表面完整性。Starting from the anti-fatigue manufacturing and green manufacturing concepts,fusing the principles of pre-stressed grinding and grind-hardening technology,an pre-stressed grind-hardening approach integrated with residual stress control,surface quenching and grinding was presented.Based on the pre-stressed grind-hardening test of 45 steel,the residual stress,hardness and roughness of the workpiece grind-hardening layer surface were studied and analyzed.Comparing with the results for the grind-hardening process under the same conditions.the results are as follows：the residual stress status of the pre-stressed grind-hardening workpieces are better than that of grind-hardening specimens,revealing that pre-stressed grind-hardening process has significant effects on the drop of residual stretch stress and increase of residual press stress;the surface hardness of pre-stressed grind？hardening workpiece is almost three times of original hardness,meanwhile,pre-stressed grind-hardening workpieces can achieve lower roughness than that of grind-hardening workpieces.Therefore,the fatigue resistance,corrosion resistance and surface integrity of pre-stressed grind-hardening workpieces are better than that of the grinding hardening workpieces.

关 键 词：预应力 淬硬磨削 表面层质量 复合加工 

分 类 号：TG580.6[金属学及工艺—金属切削加工及机床]