Core-spun yarn

Abstract

The invention relates to a core-spun yarn, the section of which is circular or rectangular. The core-spun yarn comprises an outer skin and a core material (3), wherein the outer skin comprises an outer strip steel layer (1) and an inner metal layer (2); the metal layer (2) is an aluminum layer; and the core material (3) is formed by uniformly mixing silicon powder and calcium powder. According to the core-spun yarn provided by the invention, as the outer skin comprises the outer strip steel layer and the inner metal layer and is used for preparing the core-spun yarn with the core material, and in a metal-stream inoculation process, the outer strip steel layer ensures the basic strength of the core-spun yarn. As the inner metal layer is the aluminum layer, the melting point of which is lower than that of steel, the melting time of the outer skin is integrally shortened under the condition that the basic strength of the core-spun yarn is ensured. In the molten steel treatment process, the core-spun yarn can be quickly molten to fully exert the effect of a powdery inoculant, so that the strength and toughness of the steel are guaranteed.

Description

technical field

[0001] The invention relates to a cored wire, in particular to a cored wire for aluminum-iron alloys, and belongs to the technical field of refined steel. Background technique

[0002] The cored wire is used in the deoxidation treatment of molten steel to improve the strength, toughness and electromagnetic orientation of the steel, which is called the inoculation treatment method.

[0003] The existing cored wire is to wrap the core material with strip steel to make a sandwich steel sheet tube, and the cored wire is added into the molten steel with a wire feeder to complete the treatment of the molten steel. The current cored wire is covered with steel sheet for inoculation with flow. However, due to the high melting point of steel, it cannot be melted rapidly during the inoculation process, and the mixing of core material and molten iron is not uniform, and the core material cannot be fully utilized. The effect of the inoculant, so the treated steel cannot ...

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