期刊
SURFACE & COATINGS TECHNOLOGY
卷 405, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2020.126582
关键词
High-speed laser cladding; Ni45; Cooling rate; Wear resistance; Corrosion resistance
资金
- National Natural Science Foundation of China, China [52075228, 51911530211]
- National Key Research and Development Program of China, China [2018YFC0310400]
- Natural Science Foundation of Jiangsu Province, China [BK20191458]
- Royal Society International Exchanges 2018 Cost Share (China) Scheme [IEC\NSFC\181278]
The study showed that high-speed laser cladding technology can improve coating preparation efficiency and performance compared to traditional laser cladding. The high-speed laser cladding coatings had thinner thickness, finer microstructure, higher hardness, and better wear and corrosion resistance.
High-speed laser cladding technology can significantly improve the efficiency of coating preparation and effectively widen the application range of laser cladding. In this study, the Ni45 powders were deposited on steel substrate by traditional low speed laser cladding and high-speed laser cladding process, respectively. The cladding efficiency, surface forming, cross-sectional microstructure, microhardness, wear and corrosion resistance properties of the traditional and high-speed laser cladded Ni45 alloy coatings were compared. It can be seen that the thickness of the high-speed laser cladding coating was much thinner than that of the traditional laser cladding coating. Compared with traditional laser cladding, high-speed laser cladding could achieve a cladding speed of 76.86 m/min and a cladding efficiency of 156.79 cm(2)/min. The microstructure of the two kinds of coatings shows the same growth law, but the microstructure in high-speed laser cladding was smaller and denser, and the columnar crystal interval was narrower, only about 6 mu m. It is found that the cooling rate of the traditional laser cladding coating was smaller than that of the high-speed laser cladding, and as the cladding speed increased, the cooling rate became higher and higher. The cross-section microhardness of the traditional laser cladding coating was relatively uniform of 337 HV0.2, while the microhardness of high-speed laser cladding surface increased to about 543 HV0.2. In addition, the wear and corrosion resistance of high-speed laser cladded coatings were better than that of traditional laser cladded coatings. As the cladding speed increased, the wear and corrosion resistance of the cladded coatings became better.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据