不锈钢薄壁零件选区激光熔化制造及其影响因素的研究.pdfVIP

38 1 Vol. 38, No. 1 2011 1 CHINESEJOURNAL OF LASERS January, 2011 不锈钢薄壁零件选区激光熔化制造及影响因素研究 * 杨永强 罗子艺 苏旭彬 王 迪 ( , 510640) , Dimetal-280 (SLM) , SLM , , , 96.95% , ; 20 m ; 101. 3m, 142. 0m, 21. 3 m 22. 0 m, ; , 465~ 625 M a, 390~ 515 M a, 23% ~ 48% ; ; ; TN249; TF124 A doi: 10.3788/ CJL201138.0103001 Study on Process and EffectiveFactors of Stainless Steel Thin-Wall Parts Manufactured by SelectiveLaser Melting Yang Yongqiang LuoZiyi Su Xubin Wang i ( School of Mechanical an d Au tom otive Engin eerin g, South Chin a University of Technology , Guangzhou , Gu an gdon g 510640, China ) Abstract For the rapid manufacturing of thin-wall parts, the process experiments of selective laser melting (SLM) have been carried out on imetal-280 system. The influence factors such as laser power, scanning speed, powder preparing setting, defocuslength andpowder layer thicknessare experimentedandanalyzed, then a group of optimal process parameters have been gotten. In the experiment, a variable cross-section thin-wall part with density of 96. 95% has beenproduced. The result shows that the metallurgical bonding layer by layer is excellent in the thin- wall part when investigatedin scanning electron microscope; It is shownthat the minimum absolute error inthe wall thickness of manufacturing parts using the SLM equipment is about 20m. The top andbottom thickness of the SLM part wall are 101.3 and 142.0 m, respectively, and the differences between designed and SLM part are 21. 3 and 22. 0 m, respectively, which are identical with the minimum absolute error.