Abstract
In this paper, the temperature distribution laws during selective laser melting process of GH4169 alloy were studied. When the laser power was certain, with the scanning speed reduced the temperature of the melt pool increased, which caused the accumulation of lot of heat, and making the maximum temperature over the boiling point of metal, and thus resulted in the melt pool splash and hence affected the quality of forming. When the scanning speed was a constant, with the increase of laser power, the maximum temperature in melt pool increased. And when the laser power was more than 300 W, it was prone to give rise to the vaporization of powder, and reduced the forming quality. During the forming process, the spot center temperature of each scan line decreased firstly and then increased. The temperature increased in the head and the tail of the scan line, and was stable in the middle of the scan line. The change of midpoint temperature of the scan line was stable, which ensured the performance of each layer was consistent during multi-layer scan process.
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Acknowledgements
The authors thank for The National Natural Science Foundation of China under grant Nos. 51604246, and 51775521, the Primary Research and Development Plan of Shanxi Province under grant No. 201603D121020-1, the supports of the North University of China for Young Academic Leaders.
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Liu, B. et al. (2018). Temperature Distribution Laws During Selective Laser Melting Process of Nickel Base Alloy GH4169. In: Han, Y. (eds) Advances in Materials Processing. CMC 2017. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-0107-0_31
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DOI: https://doi.org/10.1007/978-981-13-0107-0_31
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