Wire feeding process of anti-splashing solid calcium metal cored wire in stainless steel refining

Abstract

The invention discloses a wire feeding process of an anti-splashing solid calcium metal cored wire in stainless steel refining. The solid calcium metal cored wire comprises the following components in percentage by mass: more than or equal to 95% of Ca, less than or equal to 0.1% of Si, less than or equal to 0.1% of N, less than or equal to 1.0% of Al, less than or equal to 0.8% of Mg and less than or equal to 3% of impurities, the diameter of the core-spun yarn calcium core is 7.5-8.5 mm, a layer of high-temperature-resistant resin fiber paper is wound on the surface of the core-spun yarn calcium core, and the diameter of the core-spun yarn steel belt is 0.8-0.9 mm. An anti-splashing solid calcium metal cored wire is fed into a stainless steel LF vacuum induction furnace through a high-speed wire feeder, and the argon flow is adjusted to be medium stirring during wire feeding and is adjusted to be weak stirring after wire feeding is completed. By controlling the feeding speed, the feeding time and the feeding position of the anti-splashing solid metal calcium cored wire and adjusting the argon blowing amount, the splashing effect of calcium on the surface of molten steel can be obviously reduced, the effect of purifying the molten steel is achieved, and the method has the advantages of being safe and convenient to operate and high in yield.

Description

technical field [0001] The invention relates to a wire feeding process of a splash-proof solid-core metal calcium cored wire in stainless steel refining, and belongs to the technical field of smelting. Background technique [0002] In order to improve the purity of molten steel, promote the floating of inclusions, and effectively reduce the problem of nozzle nodules, calcium treatment technology is widely used in the refining process of stainless steel, and deoxidation alloying is achieved by adding calcium-aluminum cored wire and silicon calcium cored wire. However, the solubility of calcium in molten steel is not high, the boiling point is low, and it is easy to gasify. Stablize. [0003] The existing publications mainly involve the preparation method of solid metal calcium cored wire, such as: Chinese patent 201210005971.6 discloses "a seamless solid metal calcium cored wire for steelmaking deoxidation and its preparation method" , the middle layer of the invention is n...

AI Technical Summary

Problems solved by technology

However, the solubility of calcium in molten steel is not high, the boiling point is low, it is easy to gasify, it reacts with the slag in molten steel and burns quickly, and it is easy to cause molten steel to churn if it is not well controlled during the wire feeding process, and the yield of calcium is not good. Stablize

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