热处理对粉末注射成形钛合金的组织与性能的影响  

Microstructure and properties of a titanium alloy by metal injection molding

作　　者：郭世柏[1] 张厚安[1] 张荣发[2] 何新波[3] 秦明礼[3] 曲选辉[3] 

机构地区：[1]湖南科技大学机电工程学院,湘潭411201 [2]江西科技师范学院材料表面工程重点实验室,南昌330013 [3]北京科技大学材料科学与工程学院,北京100083

出　　处：《北京科技大学学报》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)

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 ℃.

关 键 词：钛合金 粉末注射成形 退火处理 微观组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]