等离子喷涂参数对镍基合金涂层组织及冲蚀磨损性能的影响  

Effect of plasma spray parameters on microstructures and erosion resistance of Ni based coatings

作　　者：韩耀武[1] 孙大千[1] 谷小燕[1] 王文权[1] 宣兆志[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2010年第2期461-466,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：长春市科技攻关计划项目(06GG135)

摘　　要：采用SEM、XRD、LSCM和冲蚀磨损试验机研究了等离子喷涂参数(氢气流量HFR、喷涂电流I)对Ni60涂层组织与冲蚀磨损性能的影响。结果表明,Ni60涂层主要由γ-Ni、Ni3B、Cr2B、CrB、M7C3、M23C6相构成;增加HFR、I有利于减小涂层中层片厚度,增加涂层结晶度、平均晶粒尺寸、微观应变量及残余应力,提高涂层显微硬度及抗冲蚀磨损性能。但过大的HFR、I(15ft3/h、600A)导致涂层孔隙率增加,显微硬度及抗冲蚀磨损性能降低。等离子喷涂参数HFR=12.5ft3/h、I=500A时,在小角度冲蚀条件下,Ni60涂层具有更高的抗冲蚀磨损性能。The effects of plasma spray parameters,Hydrogen Flow Rate（HFR）and electric current（I）,on the microstructure and erosion resistance of Ni60 coatings were investigated using SEM,XRD,LSCM and erosion wear test machine.Results show that the Ni60 coating is mainly composed of γ-Ni,Ni3B,Cr2B,CrB,M7C3 and M23C6 phases.As HFR and I increase,the lamellar thickness of the coating decreases,while the crystallinity,average grain size,micro-strain,residual stress,micro-hardness and erosion resistance increase.Excessive HFR and I result in the increase in coating porosity and decreases in micro-hardness and erosion resistance.The Ni60 coating deposited at HFR = 12.5 ft3/h and I = 500 A possesses higher erosion resistance,especially under the condition of small angle erosion.

关 键 词：材料合成与加工工艺 等离子喷涂 镍基合金涂层 涂层组织 冲蚀磨损性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]