Physical properties of SKF bearing high temperature resistant materials

Water Absorption: The percentage by mass of water absorbed by the pores in a material as a percentage of the dry mass of the material.

(1) porosity: refers to the percentage of the volume of pores in the material as a percentage of the total volume of the material. the pores of SKF bearing heat-resistant materials can be classified into three types according to their existing forms: closed pores, a pore - a pore that is connected to the outside atmosphere, connected Pore - the proportion of the entire pore SKF bearing high temperature bricks for 7L. small SKF bearing heat-resistant materials have the ability to resist erosion and structural strength; the higher the porosity The higher the porosity, especially the more interconnected pores, the lower the thermal conductivity of the material. Lightweight adobe bricks, lightweight high alumina bricks and other thermal insulation materials use a method to increase porosity and reduce their thermal conductivity.

(2) Water Absorption: The percentage by mass of water absorbed by the pores in a material as a percentage of the dry mass of the material.

(3) permeability: SKF bearing heat-resistant material permeability can be expressed in terms of the permeability coefficient, that is, the thickness of the bearing heat-resistant material under the 1m lm2 area SKF of the air volume. The pressure difference is 10 Pa.

For SKF bearing heat-resistant materials, the permeability of the product is as small as possible, but in special cases, it is necessary to have a certain degree of permeability.

The permeability of the product is considered to be one of the main performance indicators if the molten steel is purified by means of a permeable brick.

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