选区激光熔化Ti6Al4V钛合金无支撑成形质量研究  

Research on Quality of Unsupported Forming of Ti6Al4V Titanium Alloy by Selective Laser Melting

作　　者：张岩 杨光 安达 任宇航 郑广文 ZHANG Yan;YANG Guang;AN Da;REN Yuhang;ZHENG Guangwen(School of Mechatronics Egineering,Shenyang Aerospace University,Shenyang 110136,China;Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Shenyang 110136,China;Shenyang Fortune Precision Manufacturing Co.,Ltd.,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学机电工程学院,沈阳110136 [2]沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,沈阳110136 [3]沈阳富创精密制造有限公司,沈阳110136

出　　处：《有色金属工程》2024年第8期47-55,共9页Nonferrous Metals Engineering

基　　金：国家重点研发计划子课题(2022YFB4602202);辽宁省教育厅项目(LJKQZ20222269);航空制造工艺数字化国防重点学科实验室项目(SHSYS202250)。

摘　　要：悬垂结构的成形一直是SLM的加工难点,悬垂结构的成形缺陷主要包括翘曲变形、挂渣及内部未熔合等,严重影响了零件的整体成形质量。实验选取0°(水平)、20°、30°、40°、50°制备了不同倾斜角度的悬垂结构,研究了不同倾斜角度下的SLM成形Ti6Al4V钛合金悬垂结构变形量、内部结构缺陷、悬垂面粗糙度及力学性能。结果表明:成形水平悬垂结构翘曲变形发生在成形零件的两侧,随着倾斜角度的增大,在20°时翘曲变形和挂渣严重,成形试样的变形量和悬垂面粗糙度呈现减小的趋势,成形试样的内部未熔合孔洞和气孔数量减少,悬垂结构的断口形貌呈现韧窝特征,在40°时拉伸强度最大。The forming of overhanging structures has always been a machining difficulty in SLM.The forming defects of overhanging structures mainly include warping deformation,adhering slag,and internal lack of unfusion,which seriously affect the overall forming quality of the parts.This experiment selected 0°(horizontal),20°,30°,40°,and 50°to prepare overhang structures with different tilt angles.The deformation,internal structural defects,suspension surface roughness,and mechanical properties of SLM formed Ti6Al4V titanium alloy overhang structures under different tilt angles were studied.The research results indicate that the warping deformation of the formed horizontal overhang structure occurs on both sides of the formed part.As the inclination angle increases,the warping deformation and slag hanging are severe at 20°,and the deformation amount and overhang surface roughness of the formed sample show a decreasing trend.The number of internal unfused pores and pores in the formed sample decreases,and the fracture morphology of the overhang structure shows ductile dimple characteristics,The tensile strength is highest at 40°.

关 键 词：悬垂结构 翘曲变形 变形量 内部结构缺陷 粗糙度 力学性能 

分 类 号：TN249[电子电信—物理电子学]