UKO Study On The Properties Of Tungsten Carbide
Binder,Density,Grain Size,Rockwell Hardness,Minimum Transverse Rupture Strength (TRS),Compressive Strength,Magnetic Saturation and Coercive Force are the main factors which reflect the quality of tungsten carbide products.
The physical property of a tungsten carbide is determined by its composition, the particle distribution of the tungsten carbide grains after sintering, the binder content, the quality of the raw materials used, and UKO excellent workmanship with which the material is made.
Density is a check on its composition. For grades containing only tungsten carbide and a binder metal, the density of the composite decreases as the lighter binder metal content increases.
Rockwell Hardness is the resistance of a tungsten carbide to penetration by a diamond pointer under a certain load. It is measured on the A scale in UKO laboratory. Hardness is primarily a function of grain size with higher binder contents producing lower hardness values. Hardness is related to abrasive wear resistance.
Transverse Rupture Strength (TRS)
TRS is a measure of the strength of Tungsten Carbide. Tensile strength is not used on tungsten carbide because it is too brittle and accurate readings cannot be obtained. As a rule of thumb the tensile strength of tungsten carbide is approx. half of the transverse rupture strength.
Transverse rupture strength values are determined by the amount of force needed to break standard test pieces under the same test conditions.
Magnetic Saturation is the degree to which the metal binder in a UKO tungsten carbide product is saturated with carbon. For a known cobalt content, the values of magnetic saturation show how much carbon the UKO tungsten carbide contains. Magnetic saturation usually act as an indicator of relative strength among lots of a certain grade.
Coercive Force is the capability of demagnetizing the magnetic field of UKO tungsten carbide sample. It is measured in oersteds. The value of Coercive Force depends on composition, grain size distribution, and etc. It can be used as an alternative indication of hardness.