Cored wire core compound and its manufacture method

Abstract

The related core compound of core-spun yarn comprises calcium powder, calloy powder and calcium aluminate, wherein the preparation method including: mixing the lime powder and aluminum particle, and vacuum refining. The elemental calcium and calcium-aluminum alloy have high melting point and density fit to reduce the vapor pressure and decrease the molten steel splash. Specially, the calcium aluminate exists in molten steel as molten state, and has less density than the molten steel to adsorb the impurity for cleaning the molten steel.

Description

Technical field:

[0001] The invention relates to a composition for making a core layer of a cored wire and a method for making the core layer composition. Background technique:

[0002] Cored wire is a material used in smelting special steel such as low carbon-low silicon aluminum killed steel, usually composed of a core layer and a sheath wrapped on the outer surface of the core layer. In the prior art, a mixture of calcium powder and iron powder, or a mixture of calcium powder, iron powder and aluminum powder is used as the core material, and steel strip or aluminum strip is used as the sheath material, as disclosed in Chinese Patent No. 1884590 The name "a preparation method of molten steel deoxidizer for calcium-aluminum cored wire" provides a specific example of using the above-mentioned materials to make the core layer. When using cored wire to smelt special steel, the cored wire is continuously fed into the refining furnace, melted by the high temperature of the molt...