Powder pressing compacts metal or ceramic powders in hardened steel dies using high uniaxial pressure. With powder materials like iron, steel, copper, and ceramics, it produces precise green parts for gears, bushings, structural components, filters, and cutting tool substrates.
Powder pressing, or powder compaction, is a primary step in powder metallurgy used to form metal or ceramic powders into dimensionally stable green parts. The process involves filling a die cavity with a precisely metered powder blend and applying uniaxial pressure through upper and lower punches. This pressure consolidates the particles, achieving sufficient green strength for subsequent sintering. Common powders processed include iron, steel, copper, tungsten, carbide, stainless steel, and advanced ceramics. Tooling consists of hardened steel dies, punches, core rods, and ejector systems, mainly made of advanced Cold Work Tool Steels, engineered to maintain tight tolerances and withstand compressive load and abrasive wear. Lubricants and binders are added to improve flowability and reduce friction during ejection. Process variables such as compaction pressure, powder particle size, density distribution, and tooling alignment directly influence final part properties. Powder pressing is widely used for gears, bushings, structural automotive components, cutting tool substrates, filters, magnetic parts, and medical or industrial ceramic components.