2018第三屆國際機械透平學術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，經(jīng)過熱處理后其屈服強度σ0.2≥735MPa,抗拉強度σb≤882，伸長率δ5≥48%，布氏硬度262-331。KUKAPrecitec激光熔Tab.1Chemicalcompositionofalloypowde（qualityCB層質(zhì)量［4］。試驗主要針對主軸常用材料40Nio7采用鎳基自熔性粉末進行熔敷試驗，對1245HV，鎳基熔敷層硬度與母材硬度圖1熔敷層硬 曲線 distribution thedeposited熔敷層幾乎沒有任何腐蝕作用。為了能夠觀察熔敷層的顯微組織，采用馬氏試劑（鹽酸2Fig.2ThemicrostructureofthedepositedCETR磨損試驗，試驗力Tab.2Frictioncoefficientoflaser Ni基粉 3CETRFig.3Wear3dCr7C3Cr含量的增加，單個激光熔敷中的變形和開裂問題，其直接在于熔敷層的內(nèi)應力及殘余應力。影響激應力，過大的殘余應力容易引起堆焊層出現(xiàn)裂紋［1213］ZYG-220kHz1