Aiming at the problem that the heating surface of waste incineration boiler is easy to be ox-idized at high temperature and corroded by chlorine,sulfur,vanadium and molten salt,the IN-CONEL625-KN680 composite coating with metal and ceramic properties was successfully prepared on the surface of the boiler matrix by supersonic flame spraying technology and airless spraying tech-nology.The microstructure of the composite coating was characterized.The bonding strength,sur-face hardness,wear resistance at normal temperature and high temperature,corrosion properties of molten salt at high temperature and friction coefficient of the composite coating were tested and ana-lyzed.The results show that the binding strength of the composite coating is 65 MPa,the surface hardness is 73.4HR15N,the erosion resistance of the composite coating is 7～8 times that of the boiler substrate,and the high temperature wear resistance of the composite coating is increased by 10%～20%compared with that of the boiler substrate.All the performance indexes are obviously better than that of the boiler substrate,and the service life of the boiler is greatly improved.
HVOFINCONEL625 powderKN680 ceramic slurrycoating performance analysis test
国家科技期刊平台
NSTL
万方数据
维普
