Standard Test Method for Rating Grain Size and Frequency of Abnormally Large Grains in Cemented Tungsten Carbides (Hardmetals)

Importancia y uso:

5.1 The microstructure and grain growth of cemented tungsten carbides affect the material's mechanical and physical properties. The grain size and distribution will affect the material's wear resistance and fracture toughness. Abnormally large grains as compared to the background may introduce an area of weakness in a sintered part.

5.2 This test method may be used in acceptance testing of cemented tungsten carbide materials or the tungsten carbide powder used in their manufacture. The specified grain size used for the E-Rating is to be agreed upon between purchaser and supplier.

Subcomité:

B09.06

Volúmen:

02.05

Número ICS:

77.160 (Powder metallurgy)

Palabras clave:

abnormally large grains; cemented carbides; cemented tungsten carbide; E-rating; hardmetals; L-rating; microstructure;