AlSi10Mg合金电子束选区熔化成形工艺及组织成分研究

Study on Electron Beam Selective Melting Process and Composition of AlSi10Mg Alloy

摘要: 采用电子束选区熔化（electron beam selective melting，EBSM）成形技术制备AlSi10Mg试样，主要研究了工艺参数对AlSi10Mg合金成形形貌的影响及成形过程中合金成分的变化。结果表明，当电子束束流为4 mA，扫描速度为1000 mm/s时，可获得缺陷较少、组织均匀的AlSi10Mg合金件。在EBSM成形AlSi10Mg过程中，会出现Mg元素烧损现象，最终导致EBSM成形件Mg元素含量降低。

Abstract: The AlSi10Mg alloy samples were fabricated by electron beam selective melting (EBSM) technology.The effects of process parameters on the morphology and the changes of composition of AlSi10Mg alloy were studied.The results show that when the electron beam current is 4 mA and the scanning speed is 1000 m/s, the AlSi10Mg sample fabricated by EBSM with few defects and uniform microstructure can be obtained.The volatilization of Mg appears during the fabrication of the AlSi10Mg alloy by EBSM, as a result, the content of magnesium element in EBSM sample is reduced.