能量密度对AlSi10Mg合金激光沉积成形性能的影响  

Effects of Energy Density on Laser Deposition Performance of AlSi10Mg Alloy

作　　者：刘艳艳[1] 杜长星[1] Liu Yanyan;Du Changxing(College of Intelligent Manufacturing,Nanjing University of Science Technology ZiJin College,Jiangsu Nanjing 210023)

机构地区：[1]南京理工大学紫金学院智能制造学院,江苏南京210023

出　　处：《南方农机》2021年第23期189-191,196,共4页

基　　金：江苏省精密与微细制造技术重点实验室开放基金项目“纤维增强材料激光加工热作用机理与试验研究”(2020016);南京理工大学紫金学院校级科学研究项目“面向增材制造的轻量化创新设计技术研究”(2020ZRKX0401001)。

摘　　要：采用激光金属沉积工艺进行了铝合金AlSi10Mg材料的激光增材成形工艺试验研究,以线能量密度和体能量密度为综合评判参数,对单道线成形、多道面成形、多层体成形的成形性能进行了评定。研究表明,能量密度对铝合金材料激光沉积成形质量起决定性作用。线能量密度在320 J/mm~420 J/mm时成形线质量较好,线能量密度过低时不能有效沉积成形,而过高则成形线内部会形成明显的气孔缺陷;随着体能量密度的增加,成形体的拉伸强度呈现先增加后降低的趋势,体能量密度在666.7 J/mm^(3)时,沉积试样拉伸强度最高达231.2 MPa,达到AlSi10Mg铸件性能的105.09%。The experimental study of laser additive forming process of AlSi10Mg alloy was carried out.Linear energy density and volume energy density,as comprehensive evaluation parameters,were used to judge the properties of line forming,surface forming and body forming.The result shows that the energy density plays a decisive role in the quality of Laser Metal Deposition of AlSi10Mg alloy.When the linear energy density is 320 J/mm-420 J/mm,the quality of formed line is better.When the linear energy density is too low,it cannot be deposited effectively,and if it is too high,obvious pore defects will be formed in the forming.With the increase of volume energy density,the tensile strength of the formed body sample increases first and then decreases.When the volume energy density is 666.7 J/mm^(3),the tensile strength of the deposited sample is up to 231.2 MPa,reaching 105.09% of the properties of AlSi10Mg alloy as cast.

关 键 词：激光熔融沉积 AL基合金 能量密度 组织 拉伸强度 

分 类 号：TH164[机械工程—机械制造及自动化]