Cr/Mo对油润滑下Fe_3Al磨损行为的影响
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摘要
为了研究Cr/Mo对油润滑下Fe_3Al磨损行为的影响,本文通过机械合金化与热压烧结相结合的方法制备x(Cr)=5%和x(Mo)=2%的Fe_3Al基合金块状试样,并对不同Fe_3Al基合金的显微组织和油润滑状态下的磨损行为进行了相关研究,结果表明:合金元素Cr、Mo均可改善Fe_3Al材料微观组织均匀性,Cr和Mo双元素的添加对Fe_3Al材料显微组织分布均匀性改善最为明显;力学性能分析结果表明:Mo元素能够增强Fe_3Al基合金的硬度、抗压强度和韧性,Cr元素对其韧性改善的更为明显;磨损行为测试结果可得:合金元素Mo的添加可有效改善材料油润滑状态下的磨损性能,降低试样的摩擦系数和磨损率,且磨损表面波高仅约Fe_3Al材料的1/3。
The study is intended to explore the effect of Cr/Mo on the wear behavior of Fe_3Al under lubrication.Fe_3Al based alloys with x(Cr)=5% and x(Mo)=2% were prepared by combining mechanical alloying and hot pressing sintering methods,with their microstructure and wear behavior under lubrication analyzed.The results show that the alloying elements Cr and Mo can improve microstructure uniformity of Fe_3Al material.Especially,the addition of Cr and Mo elements together can significantly improve the distribution uniformity of the microstructure of Fe_3Al material.The analysis of mechanical properties shows that Mo element can enhance the hardness,compressive strength and toughness of Fe_3Al alloys,and Cr element can improve their toughness obviously.Wear behavior test results show that the addition of alloying element Mo can effectively improve the wear resistance of Fe_3Al alloys and reduce their friction coefficient and wear rate,the wear surface height being only about one third Fe_3Al material.
The study is intended to explore the effect of Cr/Mo on the wear behavior of Fe_3Al under lubrication.Fe_3Al based alloys with x(Cr)=5% and x(Mo)=2% were prepared by combining mechanical alloying and hot pressing sintering methods,with their microstructure and wear behavior under lubrication analyzed.The results show that the alloying elements Cr and Mo can improve microstructure uniformity of Fe_3Al material.Especially,the addition of Cr and Mo elements together can significantly improve the distribution uniformity of the microstructure of Fe_3Al material.The analysis of mechanical properties shows that Mo element can enhance the hardness,compressive strength and toughness of Fe_3Al alloys,and Cr element can improve their toughness obviously.Wear behavior test results show that the addition of alloying element Mo can effectively improve the wear resistance of Fe_3Al alloys and reduce their friction coefficient and wear rate,the wear surface height being only about one third Fe_3Al material.
引文
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[2] 尹衍升,李嘉 ,谭训彦,等.机械合金化-加压烧结制备Fe3Al金属间化合物[J].粉末冶金技术,2004,22(3):151.YIN Yansheng,LI Jia,TAN Xunyan,et al.Synthesis of Fe3Al intermetallics by mechanical alloying and pressing sintering [J].Powder Metallurgy Metallurgy Technology.2004,22(3):151.(in Chinese)
[3] 陈国良,林均品.有序金属间化合物结构材料物理金属学基础[M].北京:冶金工业出版社,1999.CHEN Guoliang,LIN Junpin.Physical Metallography Basis for Ordered Intermetallic Compound Structural Materials [M].Beijing:Metallurgical Industry Press,1999.(in Chinese)
[4] 高伟,李红艳,李镇江.Fe3Al基材料的应用[J].中国材料进展,2009,28(2):48.GAO Wei,LI Hongyan,LI Zhenjiang.Applications of Fe3Al Intermetallics[J].Materials China,2009,28(2):48.(in Chinese)
[5] 张玉军,李爱菊.Fe-Al基金属间化合物粉末的制备[J].复合材料学报,1999,16(4):40.ZHANG Yujun,LI Aiju.Preparation of Fe-Al Intermetallic Compounds Powder[J].Acta Materiae Compositae Sinica,1999,16(4):40.(in Chinese)
[6] 薛飞,刘江南,严文.Fe3Al金属间化合物研究现状与发展[J].西安工业学院学报,2000,20 (1):67.XUE Fei,LIU Jiangnan,YAN Wen.Recent Study and Prospects of Fe3Al Intermetallics[J].Journal of Xi’an of Technology,2000,20(1):67.(in Chinese)
[7] MCKAMEY C G,HORTON J A,LIU C T.Effect of Chromium on Properties of Fe3Al[J].Journal of Materials Research,1989(4):1156.
[8] MORRIS D G.Possibilities for High-temperature Streng-thening in Iron Aluminides[J].Intermetallics,1998,6 (7/8):753.
[9] 田玉芹.Fe3Al基金属间化合物固溶强化和析出强化[J].科技资讯,2008,(12):2.TIAN Yuqin.Solid Solution Strengthening and Precipitation Strengthening of Fe3Al Intermetallic Compounds[J].Science & Technology Information,2008(12):2.(in Chinese)