选区激光熔化工艺参数对钛合金Ti-6Al-4V成形质量的影响研究  

Effect of Selective Laser Melting Process Parameters on Forming Quality of Titanium Alloy Ti-6Al-4V

作　　者：袁美霞[1] 华明 陈欣祎 孟浩 YUAN Meixia;HUA Ming;CHEN Xinyi;MENG Hao(Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学,北京100044

出　　处：《航空制造技术》2021年第17期72-77,共6页Aeronautical Manufacturing Technology

基　　金：北京建筑大学市属高校基本科研业务费专项(X18236);国家自然科学基金项目(51975006)。

摘　　要：为了探究选区激光熔化技术(Selective laster melting,SLM)成形工艺参数对产品成形质量的影响规律,利用钛合金Ti–6Al–4V粉末作为原材料,以成形工艺参数点间距、曝光时间、线间距分别为变量,进行SLM成形试验,对表面形貌、平面度、直线度误差进行数据采集并分析,分析成形参数点间距、曝光时间和扫描线间距对成形质量的影响规律。结果表明,扫描点间距、曝光时间、线间距与表面微观几何形貌及几何精度有紧密相关性,随着线间距的增大,表面微观形状变得愈加粗糙,表面质量下降,而试件的几何精度误差则是随着线间距的增大呈现减小后增大的趋势。曝光时间80μs、点间距40μm工艺参数下的成形试件几何精度优于曝光时间60μs、点间距30μm和曝光时间100μs、点间距50μm条件下的成形试件的几何精度。In order to explore the influence of selective laser melting(SLM)process parameters on the forming quality of products,the SLM forming experiment was carried out by using titanium alloy Ti–6Al–4V powder as raw material and taking the forming process parameters of point spacing,exposure time and line spacing as variables respectively.The surface morphology,flatness and straightness errors were collected and analyzed,the influence of forming parameters,such as point spacing,exposure time and scanning line spacing on forming quality is analyzed.The results show that the scanning point spacing,exposure time and line spacing are closely related to the surface micro geometry and geometric accuracy.With the increase of line spacing,the surface micro shape becomes rougher and the surface quality decreases,while the geometric accuracy error decreases and then increases with the increase of line spacing.In the exposure time of 80μs and point spacing of 40μm the geometric accuracy of the formed specimen is better than that of the exposure time of 60μs and point spacing of 30μm,and better than that of the exposure time of 100μs and point spacing of 50μm.

关 键 词：增材制造 选区激光熔化技术 加工精度 表面形貌 加工质量 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]