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Metal minerals

Foam iron powder

Foam iron powder

Foam iron powder, also known as sponge iron powder, is a kind of iron powder added with foaming agent in a high temperature furnace above 1500 ℃ to make the iron powder become loose and porous. It is used in friction materials and can adjust the friction performance: the friction coefficient is stable, and its specific gravity is relatively light compared with the reduced iron powder. Its porous structure is conducive to reducing the brake noise of semi-metal friction material products in use.

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Reduced iron powder

Reduced iron powder

Our company uses high-quality iron scale from steel rolling to produce spongy high-quality iron powder through secondary hydrogen reduction, and the technical indicators meet the national standards. It has the following characteristics: High purity, low inclusion, good consistency, high fine powder content, good compressibility and formability. In the friction industry: The primary reduced iron powder is mainly used for semi-metal friction materials and the steel braze to form the metal part together; The secondary reduced iron powder can make the friction coefficient stable. Compared with the primary reduced iron powder, it is the main component of the less porous structure, which is beneficial to replace the steel fiber with the semi-metal friction material, and improve the product performance of the friction material.

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Chromite

Chromite

Chromite powder has good friction increasing effect at low temperature and high temperature, and can also play the role of cleaning the dual. It can play a good role in increasing friction at 100-250 ℃. The content of cr203 in chromite powder commonly used in friction materials is 25% - 45%. The higher the content of cr203, the greater the friction effect. The dosage and particle size should be controlled during use. The appropriate dosage should not exceed 7%, and the particle size and fineness should be more than 325 meshes. Too much dosage and too coarse particle size can improve friction coefficient, but it will also lead to obvious increase of friction loss and noise.

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Magnetite

Magnetite

Also known as refined iron ore, it is processed by water washing and flotation. It is the raw material for manufacturing iron oxide black. When used as filler for friction materials, it can replace chromite to provide friction coefficient, and its wear resistance is less than chromite. It is mainly used to reduce iron powder in the friction industry, and steel fiber plays a role in increasing friction in semi-metal friction materials, making its product coefficient stable.

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