首页|Analysis of Unit and Binary Diffusion in Glow Plasma Surface Alloying Process
Analysis of Unit and Binary Diffusion in Glow Plasma Surface Alloying Process
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NETL
NSTL
Trans Tech Publications Ltd
Q195 steel was conducted by plasma chromizing and Cr-Ni surface alloying process to research the relationship between unit diffusion and binary diffusion. After studying the thickness, composition, phase component of the layer and diffusion coefficients of alloying elements, results showed that (1) the thickness of chromizing layer was 150μm; the surface phase component was Fe-Cr solid solution; the surface chromium contents was 21.4%. The thickness of Cr-Ni co-diffusion layer was 40um; the surface phase component was Fe-Cr-Ni solid solution; the surface contents were: Cr 16.14%, Ni 48.16%. The alloying elements distributed in downward gradient from the outside to the inside. (2) Compared with plain surface alloying technique, using plasma surface alloying technique can get higher diffusing speed and shorten production cycle time. (3) The diffusion coefficients decreased as the diffusion distance increased. (4)Compared with chromizing, Cr-Ni co-diffusion increased the utilization ratio of alloying elements but decreased the diffusion speed of alloying elements, thus the surface alloying content increased and the thickness of alloying layer decreased.
plasma chromizing Cr-Ni co-diffusion diffusion
CHEN Xuannan、GAO Yuan、LI Bing、HUANG Xuefeng
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School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin541004, Guangxi, China
NETL
NSTL
Trans Tech Publications Ltd
