Calcium silicon iron core-spun yarn core layer composition

Abstract

The invention relates to a Si-Ca-Fe cored-wire sandwich layer combination, the combination is composed of calcium powder whose percentage by weight is 10%-60%, refining slag 40%-90% and ferrous powder 0-30%, wherein the refining slag can lower the vapor tension which is produced by calcium in the reaction process, lower the spraying amount of molten steel, and increase the utilization ratio, the refining slag adopts a calcium oxide and aluminum oxide slag system, which can exist in the molten steel in molten state, the concentration is smaller than that of the molten steel, inclusions are absorbed along the refining slag floats upward, which is very beneficial for purifying the molten steel, the ferrous powder not only can enlarge the specific weight of the cored-wire, which is beneficial for sinking the cored-wire, but also can play the role which is same with that of the refining slag, and the availability ratio of the calcium is further increased.

Description

Technical field: [0001] The invention relates to a silicon-calcium-iron cored wire core layer composition for making a cored wire. Background technique: [0002] The cored wire is a wire-shaped material used in refining molten steel. It is composed of a core layer and a sheath made of strip steel sheets wrapped around the outer surface of the core layer. When in use, the cored wire is continuously fed into the ladle through the wire feeding machine. When the foreskin of the cored wire entering the ladle is melted, the core layer is exposed to directly contact with the molten steel for chemical reaction, and stirred by argon The kinetic effect makes it able to effectively achieve deoxidation, desulfurization, and removal of inclusions, so as to improve the quality and performance of steel. It can be seen that in order for the cored wire to effectively purify molten steel, the first condition is that the active components in the core layer must be able to immerse into the mol...

AI Technical Summary

Problems solved by technology

[0005] The task of the present invention is to provide a silicon-calcium-iron cored wire core layer composition that uses a low-cost composition to slow down the calcium evaporation rate to solve the problems of resource waste and deoxidation cost.