粉末粒径对3D打印TC4钛合金致密度和性能影响  

Effects of Particle Size on Density and Properties of 3D Printing TC4 Titanium Alloy

作　　者：李风伟 谢英密 毛贻桅 蔡道生 魏青松[2] LI Fengwei;XIE Yingmi;MAO Yiwei;CAI Daosheng;WEI Qingsong(Wuhan Easymade Technology Co.Ltd.,Wuhan 430223;State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074)

机构地区：[1]武汉易制科技有限公司,武汉430223 [2]华中科技大学材料成形与模具技术全国重点实验室,武汉430074

出　　处：《特种铸造及有色合金》2024年第12期1674-1678,共5页Special Casting & Nonferrous Alloys

基　　金：国防基础科研基金资助项目(JCKY2023209B001)。

摘　　要：采用粘结剂喷射3D打印技术,对3种粒径的TC4钛合金粉末进行打印、固化和烧结。利用金相显微镜、扫描电镜及力学性能试验对3种粒径的TC4钛合金进行显微组织和力学性能研究。结果表明,TC4钛合金的烧结致密度随粉末粒径减小而增大,当粉末粒径D50为8.49μm时,烧结密度最高,为4.43 g/cm3,致密度为98.2%。考虑到粘结剂喷射3D打印TC4钛合金烧结后的强度和塑性的最佳匹配,优化粉末粒径为D10=6.45μm,D50=12.60μm,D90=22.10μm,烧结后的TC4钛合金抗拉强度为(935±12)MPa,伸长率为12.7%±0.6%,硬度(HV)为341±4。TC4 titanium alloys with different powder sizes were printed,cured and sintered by binder jetting 3D printing technology.Microstructure and mechanical properties of TC4 titanium alloys were investigated by metallographic microscope,SEM and mechanical properties test.The results indicate that the sintered density of TC4 titanium alloy is increased with the decrease of powder particle size.The sintering density reaches the maximum of 4.43 g/cm3 with powder particle size distribution D50 of 8.49μm,and relative density reaches up to 98.2%.Considering the optimum matching of tensile strength and plasticity of binder jetting 3D printing TC4 titanium alloy after sintering,the optimal powder particle size distribution is D10=6.45μm,D50=12.60μm,D90=22.10μm,where the tensile strength,elongation and hardness of sintered TC4 titanium alloy is(935±12)MPa,(12.7±0.6)%,and(341±4)HV,respectively.

关 键 词：钛合金 烧结 3D打印 致密度 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—金属材料]