电弧喷涂工艺参数对7Cr13增强Fe基涂层组织及性能的影响  

Influence of Spraying Parameters on Microstructure and Properties of Arc Sprayed 7Cr13 Reinforced Fe-based Coating

作　　者：刘峰[1] 范宏训[1] 

机构地区：[1]湖北汽车工业学院材料科学与工程学院,湖北十堰442002

出　　处：《热加工工艺》2014年第20期128-131,共4页Hot Working Technology

基　　金：湖北省教育厅重点项目(D200523002)

摘　　要：采用电弧喷涂技术在A3钢表面制备7Cr13增强Fe基涂层,利用正交试验研究了喷涂工艺参数对涂层硬度、孔隙率和磨损质量损失的影响。结果表明,在研究范围内,影响涂层硬度和磨损质量损失最主要的参数为喷涂电流,影响涂层孔隙率的最主要参数为喷涂电压。优化的工艺参数为:喷涂电流160 A,喷涂电压36 V,喷涂距离200 mm,喷涂气压0.5 MPa,7Cr13增强Fe基涂层组织呈现出典型的网络框架结构,其涂层硬度为373.7 HV,孔隙率为19.5%,磨损质量损失1.27 mg,具有较好的综合性能。7Cr13 reinforced Fe-based coating was prepared by arc spraying technology on A3 steel surface, and orthogonal experimental design was used to investigate the influences of the spraying parameters on microhardness, porosity and wear mass loss of the sprayed coatings. The results show that the spray current is the most significant factor to affect the microhardness and wear mass loss of the coating, while spray voltage is the most significant factor to affect the porosity of the coating in the experimental range. The optimum spray parameters are that spray current is 160 A, spray voltage is 36 V, spray distance is 200 ram, and spray pressure is 0.5 MPa. The 7Cr13 reinforced Fe-based coating produced with the optimum parameters displays a typical meshwork structure characteristic with good synthesis performance： the microhardness is 373.7 MPa, the porosity is 19.5%, and the wear mass loss is 1.27 mg.

关 键 词：7Cr13增强Fe基涂层 电弧喷涂 正交试验 

分 类 号：TG174[金属学及工艺—金属表面处理]