Numerical and experimental study on temperature field of activated laser welding 304 stainless steel

MEI Lifang; QIN Jianhong; YAN Dongbing

doi:10.7510/jgjs.issn.1001-3806.2020.04.016

LASER TECHNOLOGY > 2020 > 44(4): 492-496. > DOI: 10.7510/jgjs.issn.1001-3806.2020.04.016

MEI Lifang, QIN Jianhong, YAN Dongbing. Numerical and experimental study on temperature field of activated laser welding 304 stainless steel[J]. LASER TECHNOLOGY, 2020, 44(4): 492-496. DOI: 10.7510/jgjs.issn.1001-3806.2020.04.016

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Numerical and experimental study on temperature field of activated laser welding 304 stainless steel

1.
Department of Mechanical and Automotive Engineering, Xiamen University of Technology, Xiamen 361024, China
2.
Fujian Provincial Key Laboratory of Bas Advanced Design and Manufacture, Xiamen 361024, China

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Received Date: July 22, 2019
Revised Date: September 07, 2019
Published Date: July 24, 2020

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Abstract

Abstract

In order to study the effect of the active agent on the temperature of the molten pool of laser welding samples, the ANSYS 3-D finite element model of active laser welding was established with 304 stainless steel thick plate as the object. In the model, the welding temperature field was numerically simulated, and the infrared thermal imager was used to monitor the melting. Based on the comprehensive numerical calculation and experimental test data, the temperature variation trend of the specimens coated with different active agents and uncoated active agents during laser welding was compared and analyzed. The results show that the numerical simulation results are basically consistent with the experimental results. The application of the active agent does not have a significant effect on the temperature field distribution, but the peak temperature of the molten pool is slightly changed. Compared with the uncoated active agent welded specimens, SiO₂ and TiO₂ active agent respectively raises the peak temperature of the molten pool by about 7% to 9%, and the NaF active agent reduces the peak temperature of the molten pool by about 5%. This research will enrich and develop the basic theory of active laser welding thick plates, and provide important theoretical and experimental basis for the popularization and application of active laser welding.
- laser technique,
- welding,
- 304 stainless steel,
- active agent,
- temperature field,
- numerical simulation

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