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激光熔化沉积微观组织原位光谱监测:CoCrMoW合金为例
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1.天津工业大学 机械工程学院,天津 300387;2.天津工业大学 计算机科学与技术学院,天津 300387;3.卡尔斯鲁厄理工学院 应用材料研究所,德国 卡尔斯鲁厄 12, 76131

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基金项目:

National Key R&D Program of China (Grant No.2017YFB1103604), the National Natural Science Foundation of China (Grant No.61772365), and the Tian-jin Province Science and Technology Projects (Grant No.17JCQNJC04500, 17JCYBJC15100).


In-situ Spectral Monitoring of Microstructure During Laser Melting Deposition: A Case Study of CoCrMoW Alloy
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1.School of Mechanical Engineering, Tiangong University, Tianjin 300387, China;2.School of Computer Science and Technology, Tiangong University, Tianjin 300387, China;3.Institute for Applied Materials, Karlsruhe Institute of Technology, Karlsruhe 12, 76131, Germany

Fund Project:

National Key R&D Program of China (2017YFB1103604); National Natural Science Foundation of China (61772365); Tianjin Province Science and Technology Projects (17JCQNJC04500, 17JCYBJC15100)

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    摘要:

    研究了激光熔化沉积CoCrMoW涂层的微观组织与发射光谱的关系,及不同激光功率的光谱信号与CoCrMoW涂层一次枝晶间距、显微硬度的关系。提出了一种新的光谱信号指数积分面积,由4条离散Cr I谱线计算出电子温度。结果表明,当激光功率从400 W增加到1000 W,平均一次枝晶间距由3.426 μm增加到7.420 μm,显微硬度HV0.2由3461 MPa降低到3095 MPa。光谱的积分面积和电子温度随激光功率的增大而增大。涂层的一次枝晶间距与光谱信号呈正相关,而涂层的显微硬度与光谱信号呈负线性相关。与电子温度相比,积分面积在预测一次枝晶间距和显微硬度方面显示出更好的潜力。

    Abstract:

    The relationship between the optical emission spectroscopy and the microstructure of CoCrMoW coatings by laser melting deposition was investigated. The relationship between the primary dendrite spacing and microhardness of CoCrMoW coatings at different laser powers of spectral signal was studied. A new spectral signal index, the integral area, was proposed, and the electron temperature was calculated from four discrete Cr I spectral lines. The results show that with increasing the laser power from 400 W to 1000 W, the average primary dendrite spacing is increased from 3.426 μm to 7.420 μm, and the microhardness HV0.2 is reduced from 3461 MPa to 3095 MPa. The integral area and electron temperature of the spectral is also increased with increasing the laser power. The primary dendrite spacing of the coating is positively linear-related with the spectral signal, while the microhardness of the coatings is negatively linear-related with the spectral signal. In this research, compared with the electron temperature, the integral area shows a better potential for the prediction of the primary dendrite spacing and microhardness of coatings.

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夏椰林,黄昭祯,陈瀚宁,梁晓丹,石川.激光熔化沉积微观组织原位光谱监测:CoCrMoW合金为例[J].稀有金属材料与工程,2021,50(11):3901~3909.[Xia Yelin, Huang Zhaozhen, Chen Hanning, Liang Xiaodan, Shi Chuan. In-situ Spectral Monitoring of Microstructure During Laser Melting Deposition: A Case Study of CoCrMoW Alloy[J]. Rare Metal Materials and Engineering,2021,50(11):3901~3909.]
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历史
  • 收稿日期:2020-09-02
  • 最后修改日期:2020-11-25
  • 录用日期:2020-12-22
  • 在线发布日期: 2021-11-25
  • 出版日期: 2021-11-24