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《截齿镍基钴包碳化钨激光熔覆涂层磨损性能研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第35卷第1期Vo1.35No1矿冶工程2015年02月MININGANDMETALLURGICALENGINEERINGFebruary2015截齿镍基钴包碳化钨激光熔覆涂层磨损性能研究①杨盼,王琪,马丹丹,赵晓冲(1.表面物理与化学重点实验室,四川绵阳621907;2.中国矿业大学(北京)材料系,北京100083;3.安徽矿业职业技术学院机械工程系,安徽淮北235000)摘要:为解决掘进机截齿的磨损失效问题,在截齿表面激光熔覆高耐磨的镍基(Ni)钴包碳化钨(WC—Co)涂层。以42CrMo钢为基体,Ni60B商用粉末为粘结相,纳米WC.
2、Co为增强相,激光熔覆获得WC—Co陶瓷颗粒增强Ni基复合涂层。利用MM200环块磨损试验机,测试熔覆涂层在干摩擦和水摩擦环境下的耐磨性能。采用显微硬度计测量涂层磨损前后的表面硬度,电子扫描显微镜(SEM)、能谱仪(EDS)等观察熔覆涂层磨损前后的显微组织结构和成分变化。结果表明,激光熔覆涂层可以提高截齿的耐磨性能,磨损后熔覆层中的细小析出相起到了弥散强化作用,熔覆层的表面显微硬度提高了10%。相同磨损条件下,干磨损涂层硬度高于水磨损涂层硬度。关键词:磨损;激光熔覆;钴包碳化钨;涂层中图分类号:TD421.5文献标识码:Adoi:10.39
3、69/j.issn.0253—6099.2015.01.031文章编号:0253—6099(2015)0卜0116—04StudyonWear-resistingPropertyofLaser-cladedNi-basedWC-CoCoatingsonCuttingTeethYANGPan,WANGQi,MADan.dan,ZHAOXiao—chong(1.ScienceandTechnologyonSurfacePhysicsandChemistryLaboratory,Mianyang621907,Sichuan,China;2.Dep
4、artmentofMaterial,ChinaUniversityofMiningandTechnology(Beo'ing),Beijing100083,Beifing,China;3.DepartmentofMechanicalEngineering,AnhuiCollegeofMiningandTechnology,Huaibei235000,Anhui,China)Abstract:LasercladdingtechnologywasappliedtoformaNi—basedWC-Cocoatingwithhighwearresi
5、stanceonTBMcuttingteethtosolvethewearoutfailure.WithNi60Basthebindingphase.WC—C0ceramicnanoparticlereinforcedNi—basedcompositecoatingswerecladedon42CrMosteelsubstrates.Wear—resistingperformancesofthecoatingsweretestedwithaMM200ring.blockweartestingmachineindryfrictionandwa
6、terfrictionenvironment.surfacehardnessfortheoriginalcoatingsandwornonesweremeasuredbymicrohardnesstester.andtheirtransforIBSinmicrostructureandcompositionwereanalyzedbySEMandEDS.Itshowsthatthewearresistanceofcuttingteethcanbeimprovedbylaser—cladedcoatings,whilethetinypreci
7、pitatedphaseintheworncladedlayersdisplaysadispersionstrengtheningeffect,andthesurfacemicrohardnessoflayerscanbeincreasedby10%.Underthesamewearingparameters,hardnessofcoatingsafterdrywearishigherthanthoseafterwetwear.Keywords:wear;lasercladding;WC-Co;coatings掘进机是开凿平直地下巷道的机械
8、设备,用于煤加可靠性J。激光熔覆是通过在基材表面添加熔覆矿井下巷道、铁路隧道、公路隧道、矿山巷道的掘进环材料,利用高能密度的激光束使熔覆材料与基材表面节。截齿安装在截割头齿座上,
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