Powder metallurgy is a manufacturing process that uses metal powders (or mixtures of metal and non-metal powders) as raw materials to produce metal materials and products through pressing and sintering. This process primarily involves three core steps: First, the main constituent materials are prepared into fine granular powders. Next, the powders are loaded into mold cavities, where high pressure is applied to form green compacts with predetermined shapes and dimensions. Finally, the green compacts undergo sintering at high temperatures (below the material's melting point), enabling them to achieve atomic diffusion and metallurgical bonding, resulting in robust final products. This process enables direct manufacturing from powder feedstock into high-performance near-net-shape components.
二、Advantages
High material utilization: Near-net-shape forming minimizes machining, with powder recovery rates exceeding 90%. This is particularly advantageous for precious metals (e.g., tungsten, titanium), significantly reducing material waste.
Complex/Special Structures Easily Achieved: Directly produces porous, irregularly shaped, thin-walled components, as well as refractory metals (tungsten, molybdenum) and metal-ceramic composites. Suitable for applications like filtration elements and aerospace high-temperature parts.
Strong Performance Controllability: Precisely regulates part density, hardness, wear resistance, etc., by adjusting powder composition and sintering processes to meet diverse operational requirements.
High scalability for mass production: Reusable molds enable lower unit costs at higher volumes, while ensuring dimensional accuracy and consistent performance across batches.
Energy-efficient and environmentally friendly: Sintering temperatures are lower than metal melting points, simplifying processes and reducing energy consumption compared to forging or casting. This minimizes production energy use and pollution.
