Powder Forging

Powder forging is the technology of densification of sintered metal powders or extruded billets by high-temperature forging. Its main purpose is to obtain powder metallurgy materials that achieve or approach theoretical density and improve processing and mechanical properties by changing grain structures and textures in the materials. Powder forging began in the 1940s and was first used for iron powder forging, mainly for the preparation of automobiles and agricultural diesel engine transmission gears, engine connecting rods, and other power transmission mechanism parts. Meanwhile, a series of refractory metals such as tungsten and molybdenum were also widely processed by powder forging to eliminate pores and achieve densification to be further processed into micron diameter metal wires. In the 1960s, powder forging was applied in powder dispersion strengthened material forging to obtain fully dense and high-performance aircraft turbine disk parts. After the 1980s, metal powder...