| TiAl合金表面多道搭接激光重熔温度场数值模拟 |
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| 引用本文： | 王东生,田宗军,沈理达,刘志东,黄因慧.TiAl合金表面多道搭接激光重熔温度场数值模拟[J].应用激光,2008,28(6). |
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| 作者姓名： | 王东生 田宗军 沈理达 刘志东 黄因慧 |
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| 作者单位： | 1. 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,江苏,南京,210016;南京航空航天大学机电学院,江苏,南京,210016
2. 南京航空航天大学机电学院,江苏,南京,210016 |
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| 基金项目： | 国家自然科学基金资助项目
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江苏省自然科学基金重点项目
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| 摘 要： | 为了研究多道搭接对激光重熔等离子喷涂NiCoCrAl-Y2O3涂层熔化的影响,根据激光重熔的特点,采用ANSYS有限元软件的参数化设计语言,在已有的单道激光重熔温度场模型基础上,建立了TiAl合金表面多道搭接激光重熔连续移动三维温度场有限元模型.温度场的分析结果表明:由于激光扫描的热积累效应,重熔过程中试样的温度越来越高,熔池也越来越大,各扫描道之间存在明显的差异,因此不能获得熔化均匀且稀释率小的高质量重熔层.采用逐道减小激光功率或增大扫描速度的策略可以获得大体相同的各扫描道熔池;采用预热试样法同样可以有效地减轻各扫描道之间熔池的差异.
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| 关 键 词： | 激光技术 激光重熔 数值模拟 温度场 多道搭接 TiAl合金 |
Numerical Simulation on the Temperature Field of Multi-pass Laser Remelting on TiAl Alloy Surface |
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| Wang Dongsheng,Tian Zongjun,Shen Lida,Liu Zhidong,Huang Yinhui.Numerical Simulation on the Temperature Field of Multi-pass Laser Remelting on TiAl Alloy Surface[J].Applied Laser,2008,28(6). |
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| Authors: | Wang Dongsheng Tian Zongjun Shen Lida Liu Zhidong Huang Yinhui |
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| Affiliation: | Wang Dongsheng1,2,Tian Zongjun1,Shen Lida2,Liu Zhidong1,Huang Yinhui1,21Jiangsu Key Laboratory of Precision , Micro-Manufacturing Technology,Nanjing University of Aeronautics , Astronautics,Nanjing,Jiangsu 210016,China,2College of Mechanical , Electrical Engineering |
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| Abstract: | To study the influence of multi-pass to the molten condition of plasma sprayed NiCoCrAl-Y2O3 coating on the TiAl surface,a finite element model for analyzing the transient temperature field of three-dimension moving was established in view of the characters of multi-pass laser remelting.The model was based on the existed temperature field model of single-pass laser remelting,which was established by using the ANSYS parametric design language.The analyzing results show that the temperature and molten pool in... |
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| Keywords: | Laser technique laser remelting numerical simulation temperature field multi-pass TiAl alloy |
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