Process and Properties of Nibased 718 Superalloy Formed by Selective Laser Melting
In order to study the effect of laser processing parameters of selective laser melting technology (SLM) on the relative density, Vickers hardness and microstructure of Inconel 718, the FORWEDO LM120 laser melting equipment was used to study four laser processing parameters, namely the scanning speed...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2019-12-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1798 |
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| Summary: | In order to study the effect of laser processing parameters of selective laser melting technology (SLM) on the relative density, Vickers hardness and microstructure of Inconel 718, the FORWEDO LM120 laser melting equipment was used to study four laser processing parameters, namely the scanning speed, laser power, laser energy density and scanning strategy to improve the performance of the workpiece The results show that the scanning speed and laser power are the main factors affecting the formability, and the optimized process range: laser power (285~345W), scanning speed (950~1150mm/s) can gain the workpiece of 9894% relative density with fewer defects of voids and cracks The tensile strength and the yield strength of the workpiece are close to those of the traditional forging and annealing processes The heat dissipation characteristic leads to the difference of the histomorphology of the specimen, and in the stratification direction, columnar crystals directionally solidify The Vickers hardness of the sample increases with the refinement and densification of the structure |
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| ISSN: | 1007-2683 |