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Powder metallurgy is a process technology that uses forming and sintering processes to produce materials and products from metal powders (or mixtures of metal powders and non-metal powders). It is a branch of metallurgy and materials science. Its application range is extremely broad, from general machinery manufacturing to precision instruments, from hardware tools to large machinery, from the electronics industry to motor manufacturing, from civilian industries to military industries, and from general technology to cutting-edge high-tech fields, the powder metallurgy process can be found everywhere.
Development History
The powder metallurgy method originated over 3,000 years BC. The method used to produce iron essentially employed the powder metallurgy approach.
There are three significant milestones in the development of modern powder metallurgy technology:
Milestone 1: Overcoming the difficulties encountered in the melting and casting of refractory metals. The manufacturing of tungsten filaments for light bulbs in 1909 propelled the development of powder metallurgy; the advent of powder metallurgy cemented carbide in 1923 was hailed as a revolution in machining. Milestone 2: The successful production of porous oil-impregnated bearings in the 1930s; subsequently, the development of powder metallurgy iron-based mechanical parts fully leveraged the advantages of powder metallurgy in requiring minimal or no machining.
