2018第三届国际机械透平学术citc中文稿件

PaperID:CITC ProceedingsofThirdInternationalTurbomachineryConferenceCITC,April12,2018;ChongTheExperimentalStudyofLaserCladdingTechnologyontheCompressorRotorRepairYing Liang（ShenyangBlowerWorksGroup:Thetestmaintoresearchcompressorrotorshaftwhiaterialis40Nio7，ThesurfacedepositiontestwascarriedoutwithNialloy，Theoptimumprocessparameterswereobtainedbyprocessoptimization，Thesurfacemicrohardness,metallographicstructureandwearofthedepositedlayerwereyzed.Thetestresultsshowthatthesurfacehardnessishigherthanthebasematerial,andthewearisimprovedobviously.Thelasersurfaceisdepositedonthesimulatedshaft，TheresidualstresstestwasperformedbyX-raydiffraction，Inordertoavoidexcessiveresidualstresscrack，Itissuggestedthatultrasonicimpacttreatmentshouldbeusedtoeliminatestress，Goodresultscanbeobtained，BasedonAPI687,theapplicationscopeofthisprocessissummarized.:lasercladding;repair;compressorrotor;microstructureysis;abrasive;stressrelief0

Copyright©bythe40Nio7，经过热处理后其屈服强度σ0.2≥735MPa,抗拉强度σb≤882，伸长率δ5≥48%，布氏硬度262-331。KUKAPrecitec激光熔Tab.1Chemicalcompositionofalloypowde（qualityCB层质量［4］。试验主要针对主轴常用材料40Nio7采用镍基自熔性粉末进行熔敷试验，对1245HV，镍基熔敷层硬度与母材硬度图1熔敷层硬 曲线 distribution thedeposited熔敷层几乎没有任何腐蚀作用。为了能够观察熔敷层的显微组织，采用马氏试剂（盐酸2Fig.2ThemicrostructureofthedepositedCETR磨损试验，试验力Tab.2Frictioncoefficientoflaser Ni基粉 3CETRFig.3Wear3dCr7C3Cr含量的增加，单个激光熔敷中的变形和开裂问题，其直接在于熔敷层的内应力及残余应力。影响激应力，过大的残余应力容易引起堆焊层出现裂纹［1213］ZYG-220kHz1