摘要
通过正交试验研究了激光功率和扫描速度对激光选区熔化成形缺陷的影响,采用最优参数制备了TA15钛合金,并进一步研究了热处理温度对其显微组织和力学性能的影响。结果表明:采用275~280 W的激光功率和1 150~1 250 mm/s的扫描速度匹配可以达到最佳成形效果。退火温度低于860℃时,随着退火温度的提高,合金的强度降低,塑性提高,采用840℃±20℃保温2 h空冷的退火制度,可以获得满足锻件要求的强塑性组合性能。
The effects of laser power and scanning speed on the forming defects were studied using orthogonal test. Besides TA15 titanium alloy was prepared by using the optimal parameters. The effects of heat treatment temperature on microstructure and mechanical properties were further studied as well. The results show that the best forming effect can be reached by combining the laser power at 275~280 W and the scanning speed at 1 100~1250 mm/s. Moreover, when annealed below 860 ℃, by increasing the annealing temperature, the strength of the alloy decreases, while the plasticity increases. The combination of both high strength and plasticity that meet the requirements of forgings, can be obtained by annealing at 840 ℃±20 ℃, then holding for 2 h after reaching that temperature, and air cooling eventually.
作者
郭明海
高佩宝
刘斌
李广生
张英伟
相泽锋
GUO Minghai;GAO Peibao;LIU Bin;LI Guangsheng;ZHANG Yingwei;XIANG Zefeng(TSC Laser Technology Development(Beijing)Co.,Ltd.,Beijing 102206,China)
出处
《粉末冶金工业》
CAS
北大核心
2021年第2期78-84,共7页
Powder Metallurgy Industry
关键词
TA15钛合金
激光选区熔化
热处理
显微组织
力学性能
TA15 titanium alloy
selective laser melting
heat treatment
microstructure
mechanical property
