Powder metallurgy is the materials engineering process of manufacturing metal parts from fine metal powders, which are pressed into a mold under high pressure to form a compact shape and then heated below the metal's melting point in a process called sintering, causing the powder particles to bond into a solid part. The technique can produce complex net-shaped or near-net-shaped components with less material waste than machining from solid stock, and it allows combinations of metals or the inclusion of porosity that would be difficult to achieve by casting. It is widely used for producing gears, bearings, cutting tool tips and structural automotive components.
Facts
Core PrincipleMaking materials or components from metal powders 1 FAQs
How hard is the powder pressed before it is sintered?
Typically from 138 to 965 megapascals, depending on the density needed and the powder.
In the conventional press-and-sinter process, the powder mixture is compacted in a die at pressures typically as low as 138 megapascals (10 tons per square inch) or as high as 965 megapascals (70 tons per square inch). The pressure chosen depends on the density the part needs and on how compressible the powder is. The pressed part is then heated below the melting point of the base metal in a controlled-atmosphere furnace.
Connections
Associated With
Source Powder metallurgy (Wikipedia)Wikipedia contributors
Cemented tungsten carbide is made by powder metallurgy, sintering carbide powder with a cobalt binder.
In Field
Source Powder metallurgy (Wikipedia)Wikipedia contributors
Sources
1. Powder metallurgy, Wikipedia
IntroductionQuote, Introduction
Powder metallurgy (PM) is a term covering a wide range of ways in which materials or components are made from metal powders.
Powder metallurgy (Wikipedia)
Wikipedia contributors, Wikimedia FoundationAssociated With: Tungsten Carbide, Introduction
A very important product of this type is tungsten carbide. Tungsten carbide is used to cut and form other metals and is made from tungsten carbide particles bonded with cobalt.
In Field: Materials Engineering, Categories
Ceramic engineering
In Group: Metal Heat Treatment and Powder Methods, Introduction
Powder metallurgy (PM) is a wide range of ways in which materials or components are made from metal powders.
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