Core-spun yarn core layer composition

Abstract

The invention relates to a cored-wire core layer composite composed of refining slag and calcium powder, the weight percentages are: calcium power 10% to 60%, refining slag 40% to 90%. The refining slag in the composite can lower the vapor pressure formed in the calcium reaction process, reduce splashing amount of molten steel, and improve the utilization rate of calcium; the refining slag uses CaO and Al2O3 slag system, is capable of existing in molten state in molten steel, has a density smaller than molten steel, and can absorb inclusion when floating upward, which is beneficial to purifying molten steel.

Description

Technical field: [0001] The invention relates to a compound for making a core layer of a cored wire. Background technique: [0002] The cored wire is composed of a sheath made of strip steel sheets and a core layer wrapped by the sheath. When in use, the cored wire is continuously fed into the ladle through the wire feeding machine. When the sheath of the cored wire entering the ladle is melted, the core layer is exposed and then directly contacts with the molten steel for a chemical reaction. Stir the molten steel to make the core layer fully contact with the molten steel, so that the molten steel can effectively deoxidize, desulfurize, and remove inclusions, thereby improving the quality and performance of the steel. It can be seen that in order for the cored wire to complete the tasks of deoxidation, desulfurization and impurity removal, at least the following three conditions should be satisfied: one is that the core layer has good deoxidation, desulfurization and impur...

AI Technical Summary

Problems solved by technology

[0005] The task of the present invention is to provide a core layer compound for cored wires that solves the problems of resource waste and deoxidation cost by using a low-cost compound to slow down the calcium evaporation rate.