| 扩散应力对圆筒结构中渗C的影响 |
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| 引用本文： | 秦小燕,巩建鸣,耿鲁阳,沈利民. 扩散应力对圆筒结构中渗C的影响[J]. 陶瓷科学与艺术, 2010, 32(2): 37-41 |
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| 作者姓名： | 秦小燕 巩建鸣 耿鲁阳 沈利民 |
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| 作者单位： | 南京工业大学机械与动力工程学院; |
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| 基金项目： | 国家高新技术研究发展计划(863计划)资助项目(2007AA04Z407);;国家自然科学基金资助项目(20775107) |
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| 摘 要： | 运用数值方法模拟C浓度和扩散应力沿壁厚方向随扩散时间的演变规律,研究圆筒结构在平面应变情况下扩散应力对渗C的影响.结果表明:扩散应力增大了C的有效扩散系数,从而加速了质量传递的过程;当扩散时间一定时,C浓度和平均浓度随着圆筒外径与内径比值的增大而减小.圆筒中内表面渗C导致径向应力从内壁到外壁始终为压应力,周向和轴向应力在内壁附近为压应力,在外壁附近为拉应力.
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| 关 键 词： | 扩散应力 圆筒结构 渗C 数值模拟 |
Effect of diffusion-induced stresses on carburization in cylindrical structure |
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| QIN Xiao-yan,GONG Jian-ming,GENG Lu-yang,SHEN Li-min. Effect of diffusion-induced stresses on carburization in cylindrical structure[J]. Ceramics Science & Art, 2010, 32(2): 37-41 |
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| Authors: | QIN Xiao-yan GONG Jian-ming GENG Lu-yang SHEN Li-min |
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| Affiliation: | College of Mechanical and Power Engineering/a>;Nanjing University of Technology/a>;Nanjing 210009/a>;China |
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| Abstract: | To obtain the effect of diffusion-induced stresses in carbon diffusion process on the cylindrical structure for a plane strain,the distribution of carbon concentration and diffusion-induced stresses with time and diffusion depth were simulated by a numerical method.Results showed that the diffusion-induced stresses enhanced the mass transfer because of the increasing effective diffusion coefficient of the carbon.For a given time,both the concentration and the average concentration of the carbon decreased wi... |
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| Keywords: | diffusion-induced stresses cylindrical structure carburization numerical simulation. |
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