Powder metallurgy is an industrial technology for making metal powder or using metal powder (or a mixture of metal powder and non metal powder) as raw material to make metal materials, composite materials and various types of products through forming and sintering. At present, powder metallurgy technology has been widely used in the fields of transportation, machinery, electronics, aeronautics and Astronautics, weapons, biology, new energy, information and nuclear industry. It has become one of the most vigorous branches in the new material science. Powder metallurgy technology has a series of advantages such as remarkable energy saving, material saving, excellent performance, high precision and good stability. It is very suitable for mass production. In addition, some of the materials and complex parts, which are not prepared by the traditional casting methods and mechanical processing methods, can also be made by powder metallurgy technology, which has attracted much attention from the industry.
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