高熵合金微尺度磨削力实验研究  

Experimental Study on the Micro-scale Grinding Force of High-Entropy Alloys

作　　者：温雪龙 桂宏泽 巩亚东[1] 王蒙山 WEN Xue-long;GUI Hong-ze;GONG Ya-dong;WANG Meng-shan(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《东北大学学报(自然科学版)》2024年第12期1734-1743,共10页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(52275412)。

摘　　要：通过分析磨屑形成机理,建立了高熵合金微磨削力的理论模型,并推导了磨削力公式,通过正交和单因素实验,探究了磨削参数、磨粒粒度、微磨具表面涂层对磨削力的影响规律,对比了不同种类高熵合金的磨削力,分析了磨粒粒度、加工参数及力对磨屑形貌的影响.结果表明:对磨削力影响最大的是进给速度,影响最小的是磨削深度;与磨削力呈正相关的是进给速度和磨削深度,负相关的是磨削速度;使用500#磨粒微磨具所受微磨削力较大,且产生的磨屑呈小节距锯齿状;涂层微磨具所受切向磨削力比未涂层的微磨具小,而法向磨削力大;增加Al含量和加入Mo元素会导致微磨削力增大.最后比较了理论模型计算值与实验值,验证了微磨削力模型的准确性.By analyzing the formation mechanism of grinding chips,a theoretical model of micro-grinding force of high-entropy alloys was established,and the formula of grinding force was derived.Through orthogonal and single-factor experiments,the influencing laws of grinding parameters,particle sizes and surface coating of micro-grinding tools on the grinding force were explored,as well as the grinding force comparison of different high-entropy alloys.The effects of grain size,processing parameters and grinding force on the morphology of grinding chips were analyzed.The results showed that the feed speed has the greatest effect on grinding force and the least effect on grinding depth.With the increase of feed speed and grinding depth,the grinding force gradually increases,and the grinding force gradually decreases with the increase of grinding speed.The micro-grinding force of the 500#abrasive particle is larger,and the grinding chips produced are bar spacing sawteeth.The tangential grinding force of the coated microabrades is smaller than that of the uncoated microabrades,while the normal grinding force is larger.The increase of Al content and the addition of Mo element will lead to the increase of the micro-grinding force.Finally,the calculated values of the theoretical model were compared with the experimental values,and the accuracy of the micro-grinding force model was verified.

关 键 词：高熵合金 微尺度磨削 磨削力 磨屑 

分 类 号：TG139[一般工业技术—材料科学与工程] TG580.6[金属学及工艺—合金]