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| AN INVESTIGATION ON THE INFILTRATION OF COATING ALLOYS ON BASE STEELS |
| Wang Yuzhuo Wn Zhongxing(Central Iron and Steel Research Institute; Ministry of Metallurgical Industry) |
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Abstract The infiltration of NiCrBSi and CoCrW coating alloys on various base steels has been investigated systematically in this paper by means of vacuum fusion,scanning electron microscope,electron probe and X-ray diffraction techniques. A quintic equation between the condensation contact angles and the boundary face concentration difference in Fe element has been proposed by measuring the condensation contact angles of melted coating alloys on base steels and analyzing the elements diffused between them. The mechanism of infiltration process and the influence of temperature, medium and chemical compositions have been discussed. Finally, it has been shown that the infiltration is a macro manifestation of diffusion at the boundary face and a prerequisite to form firm metallurgical bond.
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Received: 25 April 1983
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[1] I. Amato, P. Cappelli and F. Baudrocco, Welding J., 10, 474s～480s (1973)
[2] 吴仲行,王葆初,冶金设备专刊,9,27～32(1981)
[3] 吴仲行,王葆初等,中国腐蚀与防护学报,1,4,60～66(1981)
[4] St. Mrowec, Werkstoffe und Korrosion, 31, 5, 37l～386 (1980) |
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