Definition and classification of powder metallurgy

Powder metallurgy is the preparation of metal powder or metal powder (or metal powder and non-metallic powder mixture) as raw materials, after forming and sintering, manufacturing metal materials, composite materials and various types of products technology. Powder metallurgy includes milling and products. Among them, pulverizing is mainly a metallurgical process, which is consistent with the word. Powder metallurgy products are often far beyond the scope of materials and metallurgy, and are often cross-disciplinary (materials and metallurgy, machinery and mechanics, etc.) technology. In particular, modern metal powder 3D printing, mechanical engineering, CAD, reverse engineering technology, layered manufacturing technology, numerical control technology, materials science, laser technology in one, making powder metallurgy products technology has become a modern comprehensive technology across more disciplines. At present, powder metallurgy technology mainly includes metal powder injection molding technology, hot isostatic pressing, powder forging, powder extrusion, flow temperature compaction technology, temperature compaction technology and powder rolling.