Numerical Prediction of Compound Layer Growth of Steel En40B during Plasma Nitriding
来源期刊：材料热处理学报2004年第5期
论文作者：WU Kun LEI Ting-quan YAN Mu-fu DAI Ya-nan
关键词：steel En40B; plasma nitriding; compound layer; computer simulation;
摘 要：This paper deals with the kinetics of compound layer growth of steel En40B plasmas nitrided at 520℃ for different time and establishes the corresponding mathematical model based on the thermodynamics and kinetics of nitrogen diffusion process. The results show that the compound layer consists of dual phases ε (Fe2-3N) and γ' (Fe4N) and its thickness increases with increasing nitriding time. The calculated data indicate that the critical concentration between compound layer and diffusion one is about 0.82wt%. The computer simulation results demonstrate that predicted compound layer thickness agrees with the measured data.
WU Kun1，LEI Ting-quan1，YAN Mu-fu1，DAI Ya-nan1
(1.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China)
摘要:This paper deals with the kinetics of compound layer growth of steel En40B plasmas nitrided at 520℃ for different time and establishes the corresponding mathematical model based on the thermodynamics and kinetics of nitrogen diffusion process. The results show that the compound layer consists of dual phases ε (Fe2-3N) and γ'' (Fe4N) and its thickness increases with increasing nitriding time. The calculated data indicate that the critical concentration between compound layer and diffusion one is about 0.82wt%. The computer simulation results demonstrate that predicted compound layer thickness agrees with the measured data.
关键词:steel En40B; plasma nitriding; compound layer; computer simulation;
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