微量Ti-6Al-4V掺杂对SLM打印纯钛机械性能与显微结构的影响  

Mechanical Properties and Microstructure of Pure Titanium through Adding Trace Ti-6Al-4V Powder in SLM Manufacturing.

作　　者：阿伊森·赛米 何俊杰 张文娜 骆小平[1] SAIMI·Ayisen;HE Junjie;ZHANG Wenna;LUO Xiaoping(Nanjing Stomatological Hospital,Affiliated Hospital of Medical School,Nanjing University,Nanjing 210001,China.)

机构地区：[1]南京大学医学院附属口腔医院,南京市口腔医院,南京大学口腔医学研究所,江苏南京210001

出　　处：《口腔医学研究》2024年第8期693-699,共7页Journal of Oral Science Research

基　　金：江苏省科技厅重点研发计划(编号:BE2021608)。

摘　　要：目的:探究选区激光熔化(selective laser melting,SLM)打印制造的添加微量Ti-6Al-4V粉末的纯钛材料,在两种不同热处理温度(650℃,2 h和700℃,2 h)及不同扫描速度(1000 mm/s和500 mm/s)下的机械性能。方法:制备SLM打印的试样,测试材料的机械性能,观察拉伸试样的断口形貌及显微结构。结果:SLM打印的纯钛试样的极限拉伸强度在1000 mm/s扫描速度时高于500 mm/s扫描速度时的25%;在650℃及700℃不同热处理条件下,650℃,2 h在两种扫描速度下都表现出更加优异的机械性能,但延伸率在700℃,2 h在低扫描速度组更高。结论:添加微量Ti-6Al-4V粉末后打印的纯钛材料相较于Ti-6Al-4V合金更能满足口腔修复体的要求。Objective:To investigate the mechanical properties of pure titanium by adding trace Ti-6Al-4V powder in SLM printing manufacturing at two different heat treatment temperatures(650℃,2 h and 700℃,2 h)and different scanning speeds(1000 mm/s and 500 mm/s).Methods:SLM samples with two different scanning speed(GA:1000 mm/s,GB:500 mm/s)were prepared and heat treated with 650℃,2 h(HT1)and 700℃,2 h(HT2).The mechanical properties of the materials were tested,and the fracture morphology and microstructure were observed with LSCM and SEM.Results:The tensile strength of SLM printed pure titanium samples was higher at 1000 mm/s(>20%),and the elongation was higher at 500 mm/s.Consistent annealing revealed that the 650℃,2 h treatment yielded outstanding mechanical performance at both scanning speeds.Conclusion:SLM-ed pure titanium material by adding trace Ti-6Al-4V powder can better meet the requirements of oral restorations compared to SLM-ed Ti-6Al-4V alloy.

关 键 词：选区激光熔化 增材制造 义齿支架 机械性能 钛 TI-6AL-4V 合金 热处理 

分 类 号：R783.6[医药卫生—口腔医学]