Complex-shaped titanium components fabricated via metal injection molding using hydride-dehydride titanium powder

• Published in: Journal of manufacturing processes 2024-09, Vol.126, p.220-229
• Main Authors: Zhou, Xiangxing, Yuan, Tiechui, Xu, Yunbao
• Format: Article
• Language: English
• Subjects: Debinding; Hydride-dehydride titanium; Mechanical property; Metal injection molding; Tribological behavior
• ISSN: 1526-6125
• DOI: 10.1016/j.jmapro.2024.07.090

Metal injection molding (MIM) is a net-shape manufacturing method that lessens the costs of production and increases the affordability of titanium goods. A range of CP-Ti specimens was prepared to confirm the primary manufacturing parameters for titanium metal injection molding utilizing affordable hydride-dehydride (HDH) powders. Mixture of powder and polyformaldehyde-based binder was injection molded, debonded, and then sintered. The optimum powder loading is 55 vol%. The ideal conditions of catalytic debinding were attained by placing the specimens in the catalytic debinding system at 120 °C temperature. Samples with minimal deformation and low impurity content were obtained when thermal debinding was carried out at a modest heating rate of 1.0 K/min and a holding time of 1.5 h. All the sintered samples have a similar microstructure, that is, lamellar α + β structure. The sample exhibits a strength of 739 MPa and an elongation of 6.1 % at the optimum sintering conditions (sintering at 1250 °C for 2 h). The samples prepared by MIM have excellent wear resistance. This process provided a straightforward and cost-effective means of producing complex-shaped titanium components from HDH Ti powder. [Display omitted]