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Physical properties of SKF Bearing high temperature resistant material
2021-10-16(1) Porosity: refers to the percentage of pore volume in the material in the total volume of the material. The pores of SKF Bearing high temperature resistant materials can be divided into three types according to their existing forms: closed pore, one pore - pore connected with the outside atmosphere, and the proportion of connected pore - whole pore. The SKF Bearing High Temperature brick is 7L. Small SKF Bearing high temperature resistant material has the ability of corrosion resistance and structural strength; The higher the porosity, especially the more interconnected pores, the lower the thermal conductivity of the material. Lightweight adobe brick, lightweight high alumina brick and other thermal insulation materials use a method to increase porosity and reduce thermal conductivity.
(2) Water absorption: the mass percentage of water absorbed by pores in the material accounts for the dry mass of the material.
(3) Air permeability: the air permeability of SKF Bearing high temperature resistant material can be expressed by air permeability coefficient, that is, the air volume of SKF in LM2 area bearing high temperature resistant material with a thickness of 1m under 1m. The differential pressure is 10 PA.
For SKF Bearing high temperature resistant material, the air permeability of the product shall be as small as possible, but in special cases, it is necessary to have a certain air permeability.
If the molten steel is purified through the permeable brick, the permeability of the product is considered to be one of the main performance indexes.