High-yield silicon-calcium core-spun yarn and preparation method thereof

Abstract

The invention discloses a high-yield silicon-calcium cored wire and a preparation method thereof, and relates to the technical field of cored wires. Comprising the following steps: step 1, spraying composite powder on the surface of a calcium wire, and carrying out laser alloying to obtain an alloyed calcium wire; 2, the surface of the alloyed calcium wire is coated with the modified coating, and a core material is obtained; and 3, wrapping the surface of a core material with the composite powder, and pressing and drawing the core material with a steel sheet to obtain the silicon-calcium core-spun yarn. The core-spun yarn has the beneficial effects that the structure of the powder in the core-spun yarn is improved, and the modified coating is introduced to the surfaces of the powder and the alloyed core material, so that the high-temperature resistance of the internal calcium wire is improved, the position of the whole core-spun yarn in molten steel is convenient to control, and the purification effect on the molten steel is improved. And meanwhile, the durability and thermoplasticity of the steel are enhanced to a certain extent.