Physical properties of SKF bearing high temperature resistant materials

(1) Porosity: refers to the percentage of pore volume in the material as a percentage of the total volume of the material. The porosity of SKF bearing high temperature resistant material can be divided into three types according to its existing form: closed pore, one pore - the pore that communicates with the outside atmosphere, and the proportion of connected pore - the whole pore is 7L. Small SKF bearing high temperature materials have the ability to resist erosion and structural strength; 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 insulation materials use a method to increase porosity and reduce their thermal conductivity.

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

(3) Air permeability: The air permeability of SKF bearing high temperature resistant materials can be expressed by the air permeability coefficient, that is, the air volume of SKF in the lm2 area of 1m with a thickness of 1m bearing high temperature resistant materials. The pressure difference is 10 Pa.

For SKF bearing high temperature resistant materials, the air permeability of the product is as small as possible, but in special cases, it needs to have a certain air permeability.

If molten steel is purified through breathable bricks, the breathability of the product is considered one of the main performance indicators.