| CuZnSnSi合金钎料相变过程的热分析动力学 |
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| 引用本文： | 鲍丽,龙伟民,裴夤崟,马佳.CuZnSnSi合金钎料相变过程的热分析动力学[J].焊接学报,2013(10):55-58. |
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| 作者姓名： | 鲍丽 龙伟民 裴夤崟 马佳 |
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| 作者单位： | 郑州机械研究所新型钎焊材料与技术国家重点实验室, 郑州 450001,郑州机械研究所新型钎焊材料与技术国家重点实验室, 郑州 450001,郑州机械研究所新型钎焊材料与技术国家重点实验室, 郑州 450001,郑州机械研究所新型钎焊材料与技术国家重点实验室, 郑州 450001 |
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| 基金项目： | 国家重点基础研究发展计划973项目(2010CB735809);国家科技支撑计划项目(2012BAB18B04);国家863高技术研究发展计划资助项目(2012AA040208) |
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| 摘 要： | CuZnSnSi合金钎料在钎焊钢工件中具有良好的综合性能.为进一步探究其合金性能,借助差示扫描分析(DSC)和热重分析(TG)技术,分别采用微分非等温法和积分非等温法分析了CuZnSnSi合金钎料相变过程的热分析动力学.结果表明,CuZnSnSi合金的相变温度范围为1150.5~1221.5 K,吸热峰温度为1174.46 K,在相变过程中没有化学反应,但出现升温段的吸热峰温度滞后于降温段的放热峰,说明了合金钎料在结晶过程需要一定的过冷度;非等温分析法计算得到合金钎料相变表观活化能为615.72 kJ/mol;由Arrhenius公式得出合金钎料相变速率常数k的变化规律为1.71×1027exp(-6.16×105/RT).
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| 关 键 词： | 钎料 相变 热分析动力学 DSC技术 表观活化能 |
| 收稿时间： | 2012/7/14 0:00:00 |
Thermal kinetics for phase transformation of CuZnSnSi alloy |
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| BAO Li,LONG Weimin,PEI Yinyin and MA Jia.Thermal kinetics for phase transformation of CuZnSnSi alloy[J].Transactions of The China Welding Institution,2013(10):55-58. |
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| Authors: | BAO Li LONG Weimin PEI Yinyin and MA Jia |
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| Affiliation: | State Key Laboratory of Advanced Brazing Filler Metal & Technology, Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou 450001, China,State Key Laboratory of Advanced Brazing Filler Metal & Technology, Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou 450001, China,State Key Laboratory of Advanced Brazing Filler Metal & Technology, Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou 450001, China and State Key Laboratory of Advanced Brazing Filler Metal & Technology, Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou 450001, China |
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| Abstract: | A study on fluid flow in the molten pool of laser deep penetration welding process was carried out which utilized the finite volume method.A three dimensional fluid flow model was established and the effect of the laser beam was represented by the Gaussian rotating body heat source.The temperature field,fluid flow and weld shape were calculated considering the Marangoni effect.The temperature field contours,the welding thermal cycle curve of molten pool and the velocity field of molten pool were analyzed based on the calculated results.Finally, the laser welding experiment was carried out with the same weld parameters.The actual weld shape was observed.The simulation results and experiment results were comprehensively analyzed.The accuracy of the numerical simulation results was verified.The calculated geometries of the molten pool and welds were more similar to that of the experimental results when the Marangoni convection was considered. |
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| Keywords: | filler metal phase transformation thermal kinetics DSC technique apparent activation energy |
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