What is powder metallurgy? Qu Xuanhui said, powder metallurgy is to use powder as materials and products, through the molding or sintering process. It is characterized by the large volume of direct preparation of the final shape and size of the parts. "This for large quantities of spare parts, such as auto parts and precious metal material is very important, the process can save a lot of processing; composite also can achieve a variety of different kinds of powder mixed together can do composite materials, for example, has the very good application in the electronic packaging materials.; third, can be prepared by ordinary smelting can be made of the materials, such as porous materials; fourth can minimize the alloy composition segregation, have very good effect in high performance titanium".

From the economy of several metal processing methods, powder metallurgy is the best technology.

The development of powder metallurgy has three stages. First, the preparation process is the traditional compression method, the process is very simple, but the overall strength is relatively low, poor performance. Second is the rapid solidification stage, the product performance is excellent, low density, high strength, heat resistance, wear resistance, but the process is complex, high cost. The third stage is low cost and high performance: integration of materials and parts.

Powder metallurgy also has many applications in the civilian field, "Apple mobile phone on a large number of parts is out of powder injection method, mainly stainless steel, if the titanium alloy will be lighter and more stylish and beautiful, recently most of the advertising has a large number of mobile phone customized titanium alloy, it can mass produced by powder metallurgy method".

Powder metallurgy technology has unique advantages in the preparation of high performance light alloy, intermetallic compound, metal matrix composite material, and has great potential and development prospect in the lightweight design and manufacture of parts.

Metal injection molding is a multi disciplinary technology, and it is one of the advanced precision forming processes of metal parts.