Pure calcium cored wire for steelmaking

Abstract

The invention discloses a pure calcium cored wire for steelmaking, belonging to the cored wire. The pure calcium cored wire for steelmaking comprises an outer coating layer and a coated core. The coated core is coated in the coating layer; the surface of the outer coating layer is provided with a stand edge which is perpendicular to the tangent of the circular cross section of the outer coating layer; and the outer coating layer has a thickness of 0.75-2.0mm. Compared with the prior art, the capacity of penetrating the steel slag of the pure calcium cored wire for steelmaking is improved greatly, thus the deformation of the pure calcium cored wire due to penetration can be reduced, the pure calcium cored wire can reach the bottom of the steel ladle better, the time of absorbing the calcium strips by the molten steel can be shortened, the formation of the calcium bubbles can be reduced, the splashing of the calcium on the surface of the molten steel can be reduced significantly, and the yield of the calcium can be improved hereby. The pure calcium cored wire for steelmaking has good popularization and application value.

Description

technical field [0001] The invention relates to a cored wire, in particular to a high-strength, high-yield pure calcium cored wire for steelmaking used in the refining process outside the furnace of an iron and steel enterprise. Background technique [0002] Cored wire technology has become an indispensable refining method in the steelmaking industry today. It has unique effects on fine-tuning, alloying, deoxidation, and removal of inclusions in molten steel, and has the advantages of low investment and simple process. Actively developing various new refining processes outside the furnace has become the general trend and main technical goal of the world's steelmaking technology development. [0003] Alloying of steel, fine-tuning of elements, removal and metamorphosis of inclusions, removal of gas in steel and other tasks to improve the purity and quality of steel are mostly completed by refining outside the furnace (ladle metallurgy). [0004] At present, the cladding thic...

AI Technical Summary

Problems solved by technology

[0004] At present, the cladding thickness of the side-type pure calcium cored wire used in the metal smelting process is 0.45mm to 0.60mm. During the use of this type of pure calcium cored wire, due to the thinner outer cladding layer, In the process of feeding molten steel, the slag penetrating ability is weak, and it is easy to cause the pure calcium cored wire to bend. At the same time, the outer cladding layer is thin and easy to melt, so it cannot be better inserted into the bottom of the ladle, causing the inner cladding metal Calcium strips can only react in the upper part of molten steel, and it is easy to form calcium bubbles to float to the surface of steel slag. The recovery rate of metallic calcium is only about 7-15%, resulting in a waste of metallic calcium

At the same time, there are also disadvantages such as large environmental pollution, serious splashing, and easy burns to operators.

Currently, there is no good solution

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