MIM is a new type of near net forming technology for metal parts formed by integrating plastic molding process, polymer chemistry, powder metallurgy and metal materials science. It has advantages unmatched by conventional powder metallurgy, machining and precision casting methods. Due to the potential technical and economic advantages of this technology, it is generally believed that the development of this technology will lead to a revolution in the production technology of parts and components, and is known as "the part forming technology of the 21st century".