Forming of powder
A process for compacting a metal powder body into a compact having a shape, size, density, and strength. It is one of the basic processes of the powder metallurgy process.
The metal powder is generally subjected to powder pretreatment before the powder is formed to meet the forming requirements. When mixing, it is generally necessary to add a certain amount of
Powder Forming additive.
Powder forming is divided into two categories: powder press forming and powder special forming.
Powder press forming, also known as powder press forming, referred to as pressing, is the earliest forming method used in powder metallurgy production. In the late 18th and early 19th centuries, Russia and the United Kingdom used steel molds to make platinum products. Subsequently, the powder press forming method was gradually improved to press the compacts of various oil-impregnated bearings, powder metallurgy friction reducing products, powders, and Taijin mechanical structural parts. Since the 1930s, powder press forming has been further developed, and presses and mold design have been continuously improved, and it is possible to suppress complex shapes and parts with higher mechanization and automation.
Special shaping of powders is used where there are special requirements for the shape, size and density of the compact. There have been powder cold isostatic pressing, powder rolling, powder extrusion, slip casting and powder explosion forming. Powder injection molding occurred in the 1970s, and metal powder injection molding occurred in the 1980s. Powder injection molding has developed rapidly in the United States and Japan, and it can produce high-precision, irregular-shaped articles and thin-walled parts.
