In recent years, selective laser melting (SLM) has been widely used in aerospace, automobile, biomedicine and other fields. However, there still remain many challenges to obtain consistent parts at the different positions on the base plate, which could be harmful to the industrial mass-production. In SLM process, the process by-products that flow with the shielding gas may influence the microstructure and tensile properties of the parts placed on different positions of the base plate. In this study, the velocity field of the shielding gas with different shielding gas volume flows was simulated. The tensile properties of the samples fabricated with different shielding gas volume flow were experimentally studied. The results show that the shielding gas volume flow has a strong influence on the sample consistency, and proper increase in shielding gas volume flows can be beneficial to consistency and tensile strength.

中文翻译：

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保护气体体积流量对选择性激光熔炼316L组织一致性和拉伸性能的影响

近年来，选择性激光熔化（SLM）已广泛应用于航空航天，汽车，生物医学和其他领域。然而，在基板上的不同位置获得一致的零件仍然存在许多挑战，这可能对工业批量生产有害。在SLM工艺中，与保护气一起流动的工艺副产物可能会影响置于基板不同位置的零件的微观结构和拉伸性能。在本研究中，模拟了具有不同保护气体体积流量的保护气体的速度场。实验研究了不同保护气体体积流量制备的样品的拉伸性能。结果表明，保护气体体积流量对样品的稠度有很大的影响，