摘要
抗冲蚀性能是可磨耗封严涂层的重要性能之一。本文采用氧-乙炔火焰喷涂技术,在45#钢基体上分别制备了CuAl复合涂层、NiCr-Al复合涂层和NiCrFe/Al(基)复合涂层。利用自制的冲蚀试验机,研究了三种涂层在不同角度下的冲蚀行为,对冲蚀后涂层的表面形貌以及截面形貌进行了SEM观察,结果表明:相同工艺参数制备的三种涂层,CuAl复合涂层抗冲蚀性能最好,NiCr-Al复合涂层次之,NiCrFe/Al基复合涂层性能最差,软性材质hBN的加入不利于涂层抗冲蚀性。冲蚀角度对涂层的冲蚀磨损行为特征有显著影响。低冲蚀角度涂层的磨损行为主要表现为显微切削和疲劳剥落;高冲蚀角度时涂层的磨损行为主要表现为片状剥落。
The erosion wear resistance is one of the most important properties of the abradable seal coating.CuAl composite coating,NiCr-Al composite coating and NiCrFe/Al composite coating were prepared on 45#steel substrate by oxygen-acetylene flame spraying.The erosion wear behavior of several abradable seal coatings under different erosion angels were investigated by a self-made sand erosion machine.The surface and cross-section morphology of different coatings were evaluated by SEM.The results show that the CuAl composite coating has the best erosion resistance,followed by NiCr-Al composite coating,and NiCrFe/Al composite coating has the worst performance.The addition of hBN marital is not good for the erosion wear resistance of the coating.The erosion angle has a significant effect on erosion wear behavior of coatings.The mainly characteristic of erosion behavior of the coating is micro-cutting and fatigue flaking at low erosion angle.The wear behavior is mainly flaking at high erosion angle.
作者
刘琦峰
章德铭
程旭莹
刘建明
刘通
Qifeng Liu;Deming Zhang;Xuying Cheng;Jianming Liu;Tong Liu(Beijing General Research Institute of Mining and Metallurgy,Beijing 100160;Beijing Engineering Technology Research Center of Surface Strengthening and Repairing of Industry Parts,Beijing 102206)
出处
《热喷涂技术》
2019年第3期57-62,共6页
Thermal Spray Technology
关键词
热喷涂
封严涂层
冲蚀磨损
冲蚀数
Thermal spraying
Seal coating
Erosion wear
Erosion rate
