Research of injection molding titanium part

Metal injection molding（ MIM）is a low cost near net shape manuf acture technique on a large production scale for titanium parts. Key points in the process are contamination of oxygen carbon and shrinkage distortion. Different combination of titanium powders can adjust particle size and shape in feedstock system, decrease binders which are wiped off by disslution, evaporation and decompostion at lower temperature. The am anic the initial oxygen content, improve the process of injecting, debinding and sintering. It is necessary to select org extraction and debinding in high or in high pure low dew point Ar are favorable for high debinding efficiency and low contamination. C content sbould be controlled in the range of 0. 16%-0 20% after debinding. The strength increases when density increases, the elongation is effected remarkably by contamination level of oxygen properties of MIM- Ti are commensurate to that of I MTi 3-4 grade. The tolerance may be controlled within

1 Titanium and metal powder injection molding

Titanium is a structural metal with silver-white luster and high specific strength. It ranks ninth in the reserves of metal minerals in the earth's crust, mostly rutile.

It exists in the form of (TO2) and ilmenite (Fe-TiO3). The oxide film (TO2) on the titanium surface is dense, chemically stable, and has good biocompatibility. It has outstanding corrosion resistance in seawater, nitric acid, alkaline solutions and aqueous chlorine. However, the enrichment and smelting process of titanium is complicated and the metallurgical cost is high; the close-packed hexagonal crystal structure and low thermal conductivity of titanium make plastic deformation and cutting difficult, and the cost of parts manufacturing is high. Therefore, seeking low-cost near-net-shape large-scale manufacturing technology for titanium parts has always been the direction of the unremitting efforts of titanium parts manufacturing.

Metal powder injection molding (MIM) is a new type of parts manufacturing technology that combines powder metallurgy technology and plastic injection molding technology. It combines the shape design freedom of injection molding and the flexibility of powder metallurgy material selection. It is suitable for low Cost, high efficiency, large-scale, near-net shape manufacturing of high-performance parts with three-dimensional complex shapes