Aluminum system deoxidizing and carburizing alloy for converters, and manufacturing method thereof

Abstract

The invention discloses an aluminum system deoxidizing and carburizing alloy for converters, and a manufacturing method thereof. The components of the alloy include, by weight percentage, 40-50% of aluminum, 18-22% of carbon, and 28-48% of iron; and the particle size of the alloy is 30-50 mm. During manufacturing, raw materials use aluminum ingots, a carburant, and industrial pure iron with particle sizes of 5-12 mm; the aluminum ingots can be melted in an induction furnace crucible, the carburant and the industrial pure iron can be added according to the ratio of finished alloy content, spiral electromagnetic stirring can be simultaneously applied, the current of the spiral electromagnetic stirring is 150-250 A, the frequency is 2.5-4 Hz, and the spiral electromagnetic stirring can be stopped after the alloy is completely solidified; and a crusher can be utilized to crush the alloy into small pieces with the particle sizes of 30-50 mm, and packaging can be performed. A deoxidizer andthe carburant can be combined; and the uniformization of the alloy can be guaranteed through the spiral electromagnetic stirring, so that the disadvantages of floating and uneasy melting of the carburant after addition during steel-making can be avoided, rapid recarburization of molten steel can be achieved, and needs of carbon steel straight up temperatures in a converter can be met.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to an aluminum-based deoxidized carburizing alloy for a converter and a manufacturing method thereof. Background technique [0002] In the process of producing medium carbon steel, carburization method is generally adopted. Taking Q235B as an example, the carbon can reach 0.07-0.09% in the converter, and a carburant needs to be added after the furnace. The carburant is characterized by being light and easy to float. If the molten steel does not undergo LF refining treatment, the recarburizer is not easy to be evenly distributed in the molten steel, and strong stirring is required in the argon station, which will cause temperature loss and must be heated in the LF, resulting in the failure of the "straight up" process of the converter. In order to complete the "straight-up" process of the converter, the best way is to directly complete the carburization while deoxidi...

AI Technical Summary

Problems solved by technology

If the molten steel does not undergo LF refining treatment, the recarburizer is not easy to be evenly distributed in the molten steel, and strong argon stirring is required, which will cause temperature loss and must be heated in LF, resulting in the failure of the "straight up" process of the converter

In order to complete the "straight up" process of the converter, the best way is to directly complete the carburization while deoxidizing, but because the carburizer is light, it is difficult to ensure the homogeneity of the alloy in the conventional process when producing the alloy

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