选区激光熔化扫描间距对AlSi10Mg合金致密度的影响
Effect of Hatch Spacing on Density of AlSi10Mg Alloy Fabricated by Selective Laser Melting
申川 1章桥新 2余金桂 2刘蓉1
作者信息
- 1. 武汉理工大学 机电学院, 湖北 武汉 430000
- 2. 武汉理工大学 机电学院, 湖北 武汉 430000;哈尔滨工业大学 先进焊接与连接国家重点研究室, 黑龙江 哈尔滨 150001
- 折叠
摘要
在确保熔池的稳定性基础上,采用AlSi10Mg合金单道选区激光熔化(SLM)试验确定了激光功率和扫描速度的合理范围,分别为150～180 W,600～1200 mm/s.选择 180 W、800 mm/s,以及 170 W、600 mm/s两组参数进行多道多层SLM试验,研究扫描间距(0.05～0.16 mm)对合金致密度的影响,以及扫描间距和拉伸方向对拉伸力学性能的影响.结果表明:致密度随着扫描间距的增加呈现先增加后减小的趋势.过小的扫描间距会产生球化颗粒,恶化致密度;而扫描间距过大时,熔池的搭接区下方会有未熔化粉末,降低了致密度.当拉伸方向和扫描方向垂直时,合金的抗拉强度和伸长率随着扫描间距的减小而略微增加,而且合金的拉伸性能明显好于拉伸方向和扫描方向平行时的.
Abstract
On the basis of stability of molten pool,a reasonable range of laser power and scanning speed is determined by single-track SLM experiments of AlSi10Mg alloy,which is 150-180 W,600-1200 mm/s,respectively.Two parameter groups of 180 W,800 mm/s and 170 W,600 mm/s were used for the multi-pass multi-layer SLM tests,the influence of the hatch spacing in 0.05-0.16 mm on the density of the alloy was studied.The results show that the density increases first and then decreases with the increase of hatch spacing.Too small hatch spacing can produce spheroidized particles,which deteriorates the density.When the hatch spacing is too big,unmelted powders exsit in the overlapping zone of the molten pools,which decreases the density.When the tensile direction is perpendicular to the scanning direction,the tensile strength and elongation of the alloy slightly increase with the decrease of the hatch spacing,and the tensile properties of the alloy are better than those with the tensile direction parallel to the scanning direction.
关键词
选区激光熔化/扫描间距/致密度Key words
selective laser melting(SLM)/hatch spacing/density引用本文复制引用
基金项目
先进焊接与连接国家重点实验室开放基金研究基金(AWJ-21Z05)
出版年
2024
NETL
NSTL
万方数据