喷丸和离子注入对镁合金摩擦腐蚀性能的影响  

Effect of shot peening and ion implantation on friction corrosion properties of magnesium alloys

作　　者：罗书鹏 窦忠宇 李粉 Luo Shupeng;Dou Zhongyu;Li Fen(School of Electronic and Information Engineering,Anshun University,Anshun 561000,China)

机构地区：[1]安顺学院电子与信息工程学院,贵州安顺561000

出　　处：《电镀与精饰》2024年第9期34-39,92,共7页Plating & Finishing

基　　金：安顺学院大学生创新创业计划训练项目(SRT202225);贵州省教育厅青年人才项目(2022040)。

摘　　要：针对镁合金摩擦耐蚀性能差的问题,对镁合金AZ31进行喷丸和离子注入工艺处理,研究不同强化工艺对镁合金摩擦和耐蚀性能的影响,使用X射线衍射仪、显微硬度计、摩擦磨损试验机、电化学工作站等对强化处理后的镁合金试样进行了测试与表征。结果表明:喷丸和离子注入强化后镁合金AZ31,相较于抛光处理以及喷丸处理的镁合金的显微硬度更高,这是由于N离子注入后有新相Mg_(3)N_(2)出现。摩擦磨损实验表明,离子注入和喷丸复合处理的镁合金摩擦系数更低,且磨损量相较于抛光处理试样降低近一倍。电化学结果显示复合处理的镁合金试样,自腐蚀电位提高至-1.13,自腐蚀电流密度大幅减小,这是由于合金表面形成的Mg_(3)N_(2)新相以及过饱和氮的扩散保护作用,说明表明离子注入和喷丸的复合工艺是进一步提高镁合金摩擦耐蚀性能的有效手段。Aiming at the problem of poor friction and corrosion resistance of magnesium alloy,magnesium alloy Az31 was treated by shot peening and ion implantation,and the effect of strengthening process on the friction and corrosion resistance of magnesium alloy was studied.The magnesium alloy samples after strengthening were tested and characterized by X-ray diffractometer,microhardness tester,friction and wear testing machine and electrochemical workstation.Magnesium alloy Az31 was treated by shot peening and ion implantation,and the effect of strengthening process on the friction and corrosion resistance of magnesium alloy was studied.The magnesium alloy samples after strengthening were tested and characterized by X-ray diffractometer,microhardness tester,friction and wear testing machine and electrochemical workstation.The results show that the microhardness of magnesium alloy AZ31 after shot peening and ion injection is higher than that of magnesium alloy afer polishing and shot peening,which is due to the appearance of new phase Mg_(3)N_(2) after N ion injection.The friction and wear experiments show that the friction coefficient of the magnesium alloy treated by ion injection and shot peening is lower,and the wear amount of the magnesium alloy treated by ion injection and shot peening is nearly twice that of the polished alloy.The electrochemical results show that the self-corrosion potential increases to-1.13,and the self-corrosion current density decreases significantly,which is due to the new Mg_(3)N_(2) phase formed on the alloy surface and the diffusion protection of supersaturated nitrogen,indicating that the combined process of ion implantation and shot peening is an effective means to further improve the friction corrosion resistance of magnesium alloys.

关 键 词：镁合金 喷丸 离子注入 摩擦磨损 腐蚀性能 

分 类 号：TG174[金属学及工艺—金属表面处理] TG306[金属学及工艺—金属学]