Effect of the Residual Oxygen Content in the Processing Atmosphere on the Properties of Stainless Steel 316L Built by Laser-Powder Bed Fusion
The operating atmosphere of the Laser-Powder Bed Fusion process is established by purging the machine′s chamber volume with a protective gas.Initially,the chamber door is closed and the inner atmosphere is comparable to the laboratorys atmosphere.Upon purging,the oxygen and other impurities are diluted.On some recent systems,the user may change the oxygen threshold value for the process to start.Although,a commonly used value is 1000 ppm O2,i.e.0.1%O2.In this study,different oxygen levels were considered,from tens of ppm to hundreds of ppm,using an external monitoring device.Both Argon and Nitrogen,as main shielding gases,were employed and compared.The oxygen effect on the tensile and impact properties of built stainless steel 316L parts,were analysed.
Laser-Powder Bed Fusion Gas Argon Nitrogen Residual oxygen Stainless steel 316L
Pauzon Camille Hryha Eduard Forêt Pierre Nyborg Lars
Department of Industrial and Materials Science,Chalmers University of Technology,SE-412 96,G(o)tebor Linde AG AT EMEA,Carl-von-Linde-Straβe 25,DE-85 716,Unterschleiβheim,Germany
国际会议
北京
英文
1629-1632
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）