不同基材的高铝青铜等离子喷焊层摩擦学特性的研究模板.doc

资料内容仅供您学习参考，如有不当或者侵权，请联系改正或者删除。本科毕业设计(论文)题目:不同基材的高铝青铜等离子喷焊层摩擦学特性的研究学生姓名:陈龙学号:09050207专业班级:材料成型及控制工程二班指导教师:李文生(教授)提交日期:6月14日摘要本课题组已研制成功的铝青铜合金具有高强度、优良塑性、耐磨耐蚀性等优点,已成功应用于冲压模具当中。为了进一步将该合金拓广应用于表面工程领域,本文探讨分析了以铝青铜合金为基础制备的合金粉末组织性能,并采用等离子喷焊工艺在不同基材(45钢、ZQAl9-4铜合金合金和T3铜)上制备喷焊层,研究了界面元素扩散及对流传质对涂层成分及组织结构的影响,进而研究其摩擦机理。采用金相显微镜和扫描电镜对涂层组织形貌观察,采用扫描电子显微镜结合能谱仪对铝青铜合金粉末及其等离子喷焊层成分进行了研究,采用显微硬度仪测试涂层表面硬度,并采用销盘式摩擦机研究摩擦磨损性能,来研究涂层组织与机械性能对摩擦磨损性能的影响,来完善合金摩擦磨损机理,为提高模具耐磨、减磨能力提供理论依据,达到提高工件寿命的目的。研究结果表明:1、以45钢、ZQAl9-4铜合金和T3铜为基材的铝青铜粉末喷焊层组织由α固溶体(白色),β固溶体(灰色)及分布在α基体上的K相(黑色)组成,K相数目与形貌影响摩擦磨损性能。2、不同基体的涂层磨损方式不同,T3紫铜涂层硬度最大,其磨损性能最佳,与经典磨损试验得出结果相同。关键词:高铝青铜;等离子喷焊;熔覆层;摩擦磨损ABSTRACTOurgrouphassuccessfullydevelopedanaluminumbronzealloywithhighstrength,goodductility,wearandcorrosionresistance,etc.,whichhavebeensuccessfullyappliedinstampingdies.Inordertofurtherappliedextensionofthealloytothesurfaceengineeringfield,thispaperanalyzesandexploresthebasisofpreparationofaluminumbronzealloymicrostructureandpropertiesofthealloypowder,andusingplasmasprayprocessonvarioussubstrates(45steel,ZQAl9-4CopperAlloyAlloyandT3copper)onthepreparationofspraycoating,diffusionandinterfaceelementsstudiedconvectivemassofthecoatingcompositionandtheimpactoforganizationalstructure,therebyaffectingthefrictionmechanism.Usingscanningelectronmicroscopycombinedwithenergydispersivealuminumbronzealloypowderandplasmasprayedcoatingmicrostructureandcompositionwerestudied,hopingthroughcontinuousimprovementsofalloypowdercoatingfrictionpropertiestoimprovemoldwear,reducingwearability,andfinallythepurposeofimprovinglifeoftheworkpiece.Thestudyresultsshowedthat:1、45steel,ZQAl9-4copperalloyandT3coppersubstratealuminumbronzepowderspraylayerorganizationbytheαsolidsolutionbody(white),betasolidsolution(gray)andthedistributionofthealphabasebodyoftheKphasecomposition(black)alphaphaseisbasedonthesubstitutionsolidsolutionCuasagroup,thebetaphase(black)byalphaandYcomp