Abstract

The results of a study of the features of selective laser melting (SLM) of the aluminum powder modified with V₂O₅ gel in an amount of 0.8 wt % are presented. It has been shown that, in the process of SLM on an EOS M 280 printer, it was impossible to obtain a material with the required porosity. It has been established that the reason for the excessive porosity of the samples consists in a high rate of heating and cooling of powders during the melting process and the formation of low-melting phase components (AlVO₄, V₂O₅). The temperature conditions of the process (heating and cooling rates) do not allow the synthesis of intermetallides of the Al–V system during SLM to change the functional properties of aluminum. It has been shown that the positive effect of V₂O₅ on the melting of aluminum particles is possible by reducing its concentration on the surface of the Al powder to values that are only sufficient to ensure the destruction of the existing oxide layer.

中文翻译：

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五氧化二钒凝胶改性铝粉的选择性激光熔化特性

摘要

介绍了用 0.8 wt% 的V ₂ O ₅凝胶改性的铝粉的选择性激光熔化（SLM）特性的研究结果。事实证明，在 EOS M 280 打印机上进行 SLM 过程中，不可能获得具有所需孔隙率的材料。已确定样品孔隙率过高的原因在于粉末在熔化过程中的高加热和冷却速率以及低熔点相组分（AlVO 4 、V 2 O ₅）_的形成_。）。工艺的温度条件（加热和冷却速率）不允许在 SLM 过程中合成 Al-V 系统的金属间化物来改变铝的功能特性。已经表明，通过将其在Al粉末表面上的浓度降低至仅足以确保现有氧化物层被破坏的值， V ₂ O _{5对铝颗粒熔化的积极影响是可能的。}