Effect of annealing processing on microstructure and properties of Ti-6Al-4V alloy by powder injection molding

• Published in: Transactions of Nonferrous Metals Society of China Vol. 16; no. B02; pp. 701 - 704
• Main Author: 郭世柏 曲选辉 向军淮 张荣发 何向明 李明升 多书旺 李文魁
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2006
• Subjects: annealing; mechanical properties; metal injection molding; microstructure; Ti6A14V alloy; Ti6Al4V合金; 力学性质; 喷射模塑法; 显微结构; 粉末注射成型; 退火过程; microstructure; annealing; metal injection molding; mechanical properties; Ti6A14V alloy
• ISSN: 1003-6326
• DOI: 10.1016/s1003-6326(06)60282-3

Ti6Al4V alloy parts were prepared by metal injection molding. Brown parts were densified at 1 200-1 260℃ for 2-4 h in vacuum atmosphere. The as-sintered specimens were treated through Hot-Isostatic Pressure（HIP） at 960 ℃ and 140 MPa. Ti6Al4V alloy compacts were annealed at 720-760 ℃ for 1 h. The results show that binder in the parts can be removed by solvent debinding and thermal debinding process. Ti6Al4V alloy has an uniform duplex microstructure with many equiaxed a grains and a little fl grains. When the annealing temperature is higher than 800 ℃, Ti6Al4V alloy has lower mechanical properties.After solution treatment and aging, a typical martensite microstructure can be achieved.