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Investigation on composition distribution of dissimilar laser cladding process using a three-phase model

机译：三相模型对不同激光熔覆过程的组成分布研究

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摘要

During the laser cladding process, complex transport phenomena occur in the molten pool including strong convection, substrate melting, melt solidification, species transport, etc., which determine the final distribution of solute concentration in the cladding layer. In this study, a three-phase Eulerian volume averaging approach was developed to investigate laser cladding with 316L steel powder on 45 steel substrate. The numerical results were validated by experimental results in terms of the geometrical morphology and chromium concentration of the cladding layer. The numerical results indicate that two distinct vortexes, driven by Marangoni force, lead to two mixing stages, i.e., the premixing stage in the front of the molten pool and the fully mixing stage in the rear of the molten pool. Both of the two mixing stages have significant effects on the final distribution of compositions in the cladding layer. Meanwhile, due to the inadequate mixing of all the compositions in the molten pool, heterogeneous composition distribution of chromium was observed both in the experimental and simulated results.
机译：在激光熔覆过程中，复杂的传输现象发生在熔池中，包括强对流，衬底熔化，熔融凝固，物种传输等，其确定覆层层中的溶质浓度的最终分布。在该研究中，开发了一种三相欧拉体积平均方法，以研究45钢基材上用316L钢粉用316L钢粉进行激光熔覆。通过实验结果验证了数值结果，就覆层层的几何形态和铬浓度而言。数值结果表明，由Marangoni力驱动的两个不同的涡旋，导致两个混合阶段，即熔池前部的预混合阶段和熔池后部的完全混合阶段。两种混合阶段的两种对包层层中组合物的最终分布具有显着影响。同时，由于熔池中所有组合物的混合不充分，因此在实验和模拟结果中观察到铬的异质组成分布。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第5期|120975.1-120975.11|共11页
  • 作者

    Honghao Ge; Hanzong Xu; Jiefeng Wang; Jun Li; Jianhua Yao;

  • 作者单位

    Institute of Laser Advanced Manufacturing Zhejiang University of Technology Hangzhou 310014 China College of Mechanical Engineering Zhejiang University of Technology Hangzhou 310014 China Collaborative Innovation Center of High-end Laser Manufacturing Equipment (National '2011 Plan') Zhejiang University of Technology Hangzhou 310014 China;

    Institute of Laser Advanced Manufacturing Zhejiang University of Technology Hangzhou 310014 China College of Mechanical Engineering Zhejiang University of Technology Hangzhou 310014 China Collaborative Innovation Center of High-end Laser Manufacturing Equipment (National '2011 Plan') Zhejiang University of Technology Hangzhou 310014 China;

    Institute of Laser Advanced Manufacturing Zhejiang University of Technology Hangzhou 310014 China College of Mechanical Engineering Zhejiang University of Technology Hangzhou 310014 China Collaborative Innovation Center of High-end Laser Manufacturing Equipment (National '2011 Plan') Zhejiang University of Technology Hangzhou 310014 China;

    School of Materials Science and Engineering Shanghai ]iao Tong University Shanghai 200240 China;

    Institute of Laser Advanced Manufacturing Zhejiang University of Technology Hangzhou 310014 China College of Mechanical Engineering Zhejiang University of Technology Hangzhou 310014 China Collaborative Innovation Center of High-end Laser Manufacturing Equipment (National '2011 Plan') Zhejiang University of Technology Hangzhou 310014 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solidification; Simulation; Laser cladding; Composition distribution;

    机译：凝固;模拟;激光包层;构成分布;

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