RESEARCH ON APPLICATION OF FLAME SPRAYING OVERLAY TECHNOLOGY ON INCREASING SERVICE LIFETIME OF SLURRY VALVE
Slurry valve is one of the important valves transporting slag in steel factories and power plants. The working conditions of slurry valve are extremely harsh, which bears not only the great flush of slag transported using the high pressure water, but also the corrosion of the sulphur, phosphorus. Therefore it is in great need of a sort of high corrosion resistance and wash resistance of the slurry valve. In contrast to other methods, flame spraying overlay has excellent characteristics. Thus, flame spraying overlay technology is determined to improve the service lifetime of slurry valves in this study. The choice of alloying powder is analyzed. Through the research on the effect of spraying process on the quality of overlay, the method to improve the spraying quality is proposed. Optical microphotoes are fully analyzed. Research shows that the combination strength of overlaying coatings and base metal is very high and the spraying overlay technology will increase its service lifetime in more than 10 times. So it is of great value to promote the method of manufacturing valves.
Deliang Ren Lianhai Hu Fangjuan Qi Fuyi Kang Bo Liao
Department of Materials Science and Engineering, Shijiazhuang Railway Institute, Shijiazhuang, 05004 The Third Valve Factory of Shijiazhuang, Shijiazhuang, 050001, China
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）