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1、中国科技论文在线http://www.paper.edu.cn#温度对镁合金微动磨损行为影响研究**王梦婕，万幸芝，彭金方，蔡振兵，朱旻昊（西南交通大学摩擦学研究所，成都，610031）5摘要：采用球-平面接触方式,研究AZ31B镁合金在20℃和300℃、不同法向载荷和位移幅值参数下的微动磨损行为，采用光学显微镜和白光干涉仪分析了微动磨损表面形貌和磨损体积。结果表明：AZ31B镁合金在两种温度下的微动磨损均出现三种运行区域：部分滑移区、混合区和滑移区。温度不改变微动运行区域。磨痕面积和磨损体积随温度和位移幅值的增加10而增大；在滑移区磨损最为严重
2、，发生氧化磨损，且在300℃时接触界面还会发生材料转移。在部分滑移区和混合区，摩擦系数随着位移幅值的增加而增大，随法向载荷的增加而减小；在滑移区，摩擦系数没有出现明显的稳定阶段，法向载荷的影响较小。温度的升高将导致摩擦系数在上升阶段的增长速率加快，峰值增大。关键词：AZ31B镁合金；微动磨损；高温；15中图分类号：TH117.1ResearchoftheinfluenceofthefrettingwearbehaviorofmagnesiumalloyinducedbytemperatureWANGMengjie,WANXingzhi,PENGJ
3、infang,CAIZhenbin,ZHUMinhao20(TribologyResearchInstitute,SouthwestJiaotongUniversity,Chengdu610031)Abstract:ThefrettingwearofAZ31BmagnesiumalloyflatsagainstGCr15steelballwereinvestigatedundertwotemperature（20℃and300℃）,variednormalloadanddisplacementamplitudes.Thefrettingworns
4、urfaceswereobservedbymeansofopticalmicroscope(OM)andWhiteLightInterferometer(WLI).TheresultsrevealedthatthefrettingregimesoftheAZ31Bmagnesiumalloy25werestronglydependentupontheimposednormalloadsanddisplacementamplitudes,butthetemperaturehadnoeffectonthefrettingregimes.Thedyna
5、micprocessoffrettingwearmightbeoutlinedasthreerunningregimes:thepartialslipregime(PSR),themixedfrettingregime(MFR)andtheslipregime(SR).Thewearareaandthewearvolumeincreasedwithincreasingtemperatureanddisplacementamplitude;intheslipregime,wearwasthemostserious,andoxidativeweara
6、ndmaterial30transferoccurredbetweenthecontactsurface.Inthepartialslipregimeandthemixedfrettingregime,thefrictioncoefficientincreasedastheamplitudeofthedisplacementincreased,andthefrictioncoefficientdecreasedasthenormalloadincreased.Intheslipregime,thefrictioncoefficientdidnot
7、showasignificantstabilizationphase,sotheeffectofnormalloadwasinsignificant.Theincreaseoftemperatureleadstotherateofthefrictioncoefficientontherisingstageincreasingandthepeak35rising.Keywords:AZ31Bmagnesiumalloy;frettingwear;Hightemperature0引言[1]40镁合金的制备和加工工艺的进步极大地促进了镁合金在工业领域的
8、应用。目前镁的应用领域主要在汽车工业、航天航空工业、家用电器、军工企业和3C行业等方面。据估计，通过应用镁技术，每年平均每辆新车每公里产
