Powder metallurgy (powder binding method) is a processing technology that involves forming powders of metals, ceramics, and other materials into a predetermined shape, then heating (sintering) them at a temperature below their melting point to promote bonding between the powder particles and obtain dense solid materials. This method offers a wide range of material choices and is suitable for processing difficult-to-machine materials and high-melting-point materials. Representative processing methods include press-forming and sintering, metal injection molding (MIM), and additive manufacturing (such as SLS/DMLS), enabling the manufacturing of parts with complex shapes and porous structures. It is widely utilized in fields requiring high precision and special functions, such as automotive parts, electronic components, medical devices, and aerospace components, contributing to the optimization of material properties and cost reduction.