Effect of Heating Treatment on the Microstructure and Properties of Cr-Mo Duplex-Alloyed Coating Prepared by Double Glow Plasma Surface Alloying

被引：11
作者：
Hu, Jianjun [1 ,2 ]
Wang, Jing [1 ]
Jiang, Jie [1 ]
Yang, Xian [1 ]
Xu, Hongbin [2 ]
Li, Hui [1 ]
Guo, Ning [3 ]
机构：
[1] Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China
[2] Chongqing Municipal Key Lab Inst Higher Educ Moul, Chongqing 400054, Peoples R China
[3] Southwest Univ, Sch Mat Sci & Energy, Chongqing 400715, Peoples R China
来源：
COATINGS | 2019年 / 9卷 / 05期
关键词：
Cr-Mo coating; double glow plasma surface alloying; hardness; heat treatment; AISI; 5140; STEEL; CHROMIUM; BEHAVIOR; IMPROVEMENT; EVOLUTION; DIFFUSION; TI6AL4V; NICKEL; WEAR;
D O I：
10.3390/coatings9050336
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, Cr-Mo duplex-alloyed coating was prepared on carbon steel by double glow plasma surface alloying (DGPSA). The effect of annealing and quenching and tempering (Q&T) treatments on the microstructure and performance of the coating was investigated by X-ray diffraction (XRD), energy dispersive spectrometry (EDS), backscattering electron imaging (BSEI) and electron backscattering diffraction (EBSD) techniques. The results show that a gradient structured coating composed of an Fe-Cr-Mo solid solution (Fe-Cr-Mo SS) layer and an alloyed pearlite layer was obtained on the steel surface. The affected layer was adjacent to the coating. After annealing or Q&T, more carbides precipitated in the Fe-Cr-Mo SS layer and alloyed pearlite layer. Most of the C atoms in the subsurface were dragged into the coating to form carbides in the Fe-Cr-Mo SS and alloyed pearlite layers of the coating, transforming the affected layers into a carbon-poor zone. Annealing and Q&T hardly modified the thickness of the coating, but greatly changed the hardness and corrosion resistance of the coating. The Q&T treated samples had higher hardness and better corrosion resistance than the as-DGPSA treated and the annealed samples.
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页数：11
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