| 45钢表面激光重熔温度场数值模拟 |
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| 引用本文： | 田宗军,王东生,黄因慧,沈理达,刘志东,陈勇. 45钢表面激光重熔温度场数值模拟[J]. 材料热处理学报, 2008, 0(6) |
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| 作者姓名： | 田宗军 王东生 黄因慧 沈理达 刘志东 陈勇 |
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| 作者单位： | 南京航空航天大学江苏省精密与微细制造技术重点实验室;南京航空航天大学机电学院; |
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| 基金项目： | 国家自然科学基金资助项目(59975046); 江苏省自然科学基金重点项目(BK2004005) |
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| 摘 要： | 根据传热学理论和数值模拟方法研究温度场的分布规律,在考虑了热物性参数、换热系数、相变潜热随温度变化的因素,应用ANSYS有限元软件的参数化设计语言建立了45钢表面激光重熔连续移动三维瞬态温度场有限元模型。结果表明:提高激光功率对增大相变硬化区效果不大,反而形成较大的熔池而使重熔表面粗糙。与激光功率相比,激光扫描速度对试样温度场的影响较小。经过激光重熔后,形成重熔区、相变硬化区和基体三个区域。实验结果较好地验证了模拟结果,表明所建立的温度场计算模型是正确和可靠的。通过该计算模型,可以掌握金属表面激光重熔过程加热和冷却规律,为制备高性能表面改性层选择合适的工艺参数提供依据。
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| 关 键 词： | 激光重熔 数值模拟 ANSYS有限元 温度场 微观结构 |
Numerical simulation of temperature field of laser remelting on 45 steel |
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| TIAN Zong-jun,,WANG Dong-sheng,HUANG Yin-hui,SHEN Li-da,LIU Zhi-dong,CHEN Yong. Numerical simulation of temperature field of laser remelting on 45 steel[J]. Transactions of Materials and Heat Treatment, 2008, 0(6) |
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| Authors: | TIAN Zong-jun WANG Dong-sheng HUANG Yin-hui SHEN Li-da LIU Zhi-dong CHEN Yong |
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| Affiliation: | TIAN Zong-jun1,2,WANG Dong-sheng2,HUANG Yin-hui1,SHEN Li-da2,LIU Zhi-dong1,CHEN Yong2(1.Jiangsu Key Laboratory of Precision , Micro-Manufacturing Technology,Nanjing University of Aeronautics , Astronautics,Nanjing 210016,China,2.College of Mechanical , Electrical Engineering,China) |
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| Abstract: | In order to fully understand the mechanism of laser remelting process on metal surface,distribution of temperature field was studied by numerical simulation method based on heat transfer theory.In view of the characteristics of laser remelting,a travel heat source combined with the surface loads was designed by analyzing both the temperature relativity of the thermal physical parameters of material and the latent heat and the effect of convection radiation on temperature field.A computing model of transient... |
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| Keywords: | laser remelting numerical simulation ANSYS finite element method temperature field microstructure |
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