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超声辅助激光熔覆SiC/316L温度场和应力场分析

李德英, 张坚, 赵龙志, 邓志成

李德英, 张坚, 赵龙志, 邓志成. 超声辅助激光熔覆SiC/316L温度场和应力场分析[J]. 焊接学报, 2017, 38(5): 35-39. DOI: 10.12073/j.hjxb.20170508
引用本文: 李德英, 张坚, 赵龙志, 邓志成. 超声辅助激光熔覆SiC/316L温度场和应力场分析[J]. 焊接学报, 2017, 38(5): 35-39. DOI: 10.12073/j.hjxb.20170508
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LI Deying, ZHANG Jian, ZHAO Longzhi, DENG Zhicheng. Analysis on temperature and stress of SiC/316L coating by ultrasonic-assisted laser cladding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(5): 35-39. DOI: 10.12073/j.hjxb.20170508
Citation: LI Deying, ZHANG Jian, ZHAO Longzhi, DENG Zhicheng. Analysis on temperature and stress of SiC/316L coating by ultrasonic-assisted laser cladding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(5): 35-39. DOI: 10.12073/j.hjxb.20170508
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超声辅助激光熔覆SiC/316L温度场和应力场分析

  • 华东交通大学 材料学院先进材料激光制造技术研究所, 南昌 330013

基金项目: 国家自然科学基金资助项目（51165008）；江西省科技厅资助项目（20142BDH80004）；江西省教育厅资助项目（KJLD14040）；载运工具与装备教育部重点实验室资助项目（12JD04）

Analysis on temperature and stress of SiC/316L coating by ultrasonic-assisted laser cladding

  • Institute of Laser Manufacture Technology for Advanced Materials, School of Materials, East China Jiaotong University, Nanchang 330013, China

摘要

    摘要
  • 摘要: 建立了激光熔覆SiC/316L复合涂层有限元分析模型，采用超声振动热效应转化和施加动态边界条件相结合的方法对超声振动边界条件作近似处理，对超声辅助激光熔覆SiC/316L复合涂层的温度分布和残余应力进行分析，并分析了超声振幅和扫描速度对温度场和应力场的影响.结果表明，随着超声振幅增大和扫描速度减小，涂层表面温度升高；超声作用下涂层残余应力有所降低，且随着超声振幅和扫描速度增大，残余应力值先减小后增大.采用优化工艺参数进行超声熔覆试验，超声作用使涂层中各区域组织得到细化且均匀分布，有利于降低涂层中残余应力.
    Abstract: The finite element model of SiC/316 L composite coating was established. The boundary conditions with ultrasonic vibration was made approximation by the method of combining thermal effects conversion with dynamic boundary conditions imposed. The temperature distribution and residual stress of SiC/316 L composite coating by ultrasonic-assisted laser cladding were discussed. The influence of ultrasonic amplitude and scanning speed on the temperature field and stress field were investigated. The results show that the surface temperature of coating is increased with the decrease of ultrasonic amplitude and scanning speed. The residual stress of coating is reduced with ultrasonic vibration. With the increase of ultrasonic amplitude and scanning speed, the residual stress reduces firstly and increases afterward. The experiment of ultrasonic cladding is prepared by the optimized technological parameters. The test results show that the microstructure of coating are refined and uniform with ultrasonic vibration, which is conducive to reduce the residual stress of coating.
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    • 参考文献(11)
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  • 收稿日期:  2015-05-26

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