摘要
采用粉末注射成形方法制备了钛合金坯体,利用溶剂脱脂和热脱脂方法脱除坯体中粘结剂,并在真空气氛下烧结致密钛合金样品.真空烧结后,经960℃和140MPa热等静压处理,在720～760℃进行1～1.5h退火处理获得的样品微观结构为均匀的双态组织,由许多等轴较小的α晶粒和少量尺寸较小的β晶粒组成.XRD分析结果表明,当退火温度高于800℃时,样品存在Ti3Al杂质相.
Titanium alloy parts were prepared by metal injection molding, binder was removed from the parts by solvent debinding process, and the brown parts were densified in vacuum atmosphere. The as-sintered specimens were treated through hot-isostatic pressure at 960 ℃ and 140 MPa, and titanium alloy compacts were annealed at 720 - 760 ℃ for 1 - 1.5 h. SEM observations showed that the titanium alloy had a uniform dial microstructure with many equiaxed a grains and a little β grains. XRD results indicated that Ti3Al phase was found in the alloy when the annealing temperature was higher than 800 ℃.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2007年第7期721-724,共4页
Journal of University of Science and Technology Beijing
基金
国家"973"计划资助项目(No.TG2000067203)
关键词
钛合金
粉末注射成形
退火处理
微观组织
titanium alloy
metal injection molding
annealing
microstructure
