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| PASTE PLASMA ALUMINIZING BY HOLLOW CATHODE DISCHARGE |
| GAO Yuan HE Zhiyong XU Chong (Taiyuan University of Technology; Taiyuan 030024) |
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Abstract A new aluminizing method, the paste plasma aluminizing by hollow cathode, was developed. The optimum paste composition was obtained by orthogonal test method to be 40wt% Al, 5wt% NasAlFe, 5wt% KBF4, 50wt% SiC. The aluminizing was carried out at 1050℃ for 2h. The aluminized layer was 230 μm thick. The treatment increased oxidation resistance of low carbon steel by 2-3 times. The diffusion mechanism of this aluminizing process was discussed. Its advantages included quick diffusion speed, good surface quality and the possibility of localized aluminizing.
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Received: 25 August 1997
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