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The hardness of alloy rotary file material refers to the resistance of solid material to permanent deformation

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The hardness of alloy rotary file material refers to the resistance of solid material to permanent deformation

Date of release:2018-05-27 Author: Click:

The strength of a material is the ability of the material to resist damage (permanent deformation and fracture) under the action of external forces.It's a stress value.Alloy rotary file

The hardness of a material is the resistance of a solid material to permanent deformation, the ability of one object to invade another.

Hardness and strength are two concepts. Generally, materials with high hardness are stronger, but not completely. For example, the hardness of silicon carbide is higher than that of corundum, but its yield strength and shear strength are both lower than that of corundum.

However, for the same material, the crushing strength (that is, the force that produces permanent deformation) of the material is closely related to the microcracks in the material. The formula for calculating the yield strength is as follows:

Sigma = F/S

F-- the force applied to a material with a plastic deformation of 0.2% of its original length

S-- cross-sectional area of the stressed material

According to the above formula, to make the corresponding measuring instrument for production will have a certain degree of complexity.But the strength of the material is related to the internal micro-cracks, internal micro-cracks are more likely to be broken, reflected in the use of performance is: the anti-crushing performance is very poor, made of abrasive will be not durable, made of refractory will reflect not strong.

Therefore, the design idea of this instrument is to use the same force to strike different samples for the same number of times, to compare the crushing conditions of different materials, and to evaluate the anti-crushing properties of materials according to the obtained parameters.

Alloy rotary file the instrument USES a 12mm cemented carbide ball with a certain speed and stroke on the sample to blow, according to the degree of sample crushing to evaluate and compare its crushing strength.

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