Microstructural and Physical Properties of a Nickel-Chromium Alloy Powder Laser Alloyed onto a 45 Steel Surface

被引:0
|
作者
Qiu, X-W. [1 ,2 ]
Zhang, Y-P. [1 ]
Liu, C-G. [3 ]
机构
[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China
[2] Sichuan Coll Architectural Technol, Dept Mat Engn, Deyang 618000, Peoples R China
[3] Sichuan Coll Architectural Technol, Dept Transportat & Municipal Engn, Deyang 618000, Peoples R China
关键词
CO2; laser; laser alloying; nickel; chromium steel; microstructure; metallurgical bonding; microhardness; corrosion resistance;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The alloying treatment was carried out by CO2 laser on 45 steel surface, the microstructure and physical properties of the alloyed layer were researched by means of scanning electron microscope (SEM) with energy dispersive spectrum (EDS) analysis, metallographic microscope, X-ray diffraction (XRD). microscopic Vickers hardness tester. electrochemical workstation, etc. The results indicate that the coatings of the laser alloyed layer were constituted by the alloying zone, the bonding zone and the heat affected zone (HAZ). The combination between the coating and substrate is metallurgical. Cr3C2, FeNi3, Cr23C6, Fe3C were that main phases appearing in the alloyed layer. The microhardness of the laser alloyed layer was 1056 Hv and the corrosion resistance performance also increased. The increase in scanning speed was also seen to improve the corrosion resistance.
引用
收藏
页码:257 / 265
页数:9
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