摘要
采用选区激光熔化技术成形TC4试样,研究了线扫描功率、曝光时间和退火处理对TC4成形试样微观组织和性能的影响。结果表明,试样的缺陷随线扫描功率的升高而减少。线扫描功率在400 W,曝光时间为30μs,经过退火处理后,试样抗拉强度达到1153MPa,高出普通TC4钛合金锻件近300MPa,同时,试样的拉伸断面总体呈脆性断裂。
A selective laser melting technology was used to form TC4 samples.The effects of scan line power,exposure time and annealing process on the microstructure and properties of TC4 sample were investigated.The microstructure,section morphology and mechanical properties of the samples before and after heat treatment were analyzed.The results show that the defects of sample are decreased with the increase of scan line power.The tensile strength of the sample after annealing reaches 1153 MPa,which is nearly 300 MPa higher than that of ordinary forging TC4 titanium alloy when the power of the scan line is 400 Wand the exposure time is 30μs.The tensile fracture of the sample presents brittle crack.
作者
张成
刘玉德
张萌
马英怡
黄志刚
Zhang Cheng;Liu Yude;Zhang Meng;Ma Yingyi;Huang Zhigang(School of Materials Science and Mechanical Engineering,Beijing Technology and Business University)
出处
《特种铸造及有色合金》
CAS
北大核心
2020年第3期302-306,共5页
Special Casting & Nonferrous Alloys
基金
“十三五”国家重点研发计划资助项目(2018YFD0400800)
国家自然科学基金资助项目(51975006)
2019年研究生科研能力提升计划资助项目
2019学位与研究生教育资助项目。
关键词
选区激光熔化
退火处理
力学性能
TC4钛合金
Selective Laser Melting
Annealing Treatment
Mechanical Properties
TC4Titanium Alloy
