Control method of inclusions in ultra-low carbon steel

A control method and ultra-low carbon steel technology, applied in the direction of manufacturing converters, improving process efficiency, etc., can solve the problems of difficult to effectively remove alumina inclusions and high removal costs, and achieve stable and reliable methods, low removal costs, and process control simple effects

Active Publication Date: 2018-10-02
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0011] The purpose of the present invention is to provide a control method for inclusions in ultra-low carbon steel, to solve the existing technology of high cost of removal of inclusions in ultra-low carbon steel with a carbon content of 0.0020%, and difficulty in effectively removing alumina inclusions question

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  • Control method of inclusions in ultra-low carbon steel
  • Control method of inclusions in ultra-low carbon steel
  • Control method of inclusions in ultra-low carbon steel

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Embodiment Construction

[0027] The present invention will be further illustrated below in conjunction with specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0028] In the examples shown in Table 1 to Table 4, a 150-ton top-bottom combined blowing converter is used as an example to smelt IF automobile inner plate steel, and the bottom blowing gas in the converter smelting process is argon. The technical solution includes: converter smelting, converter lower temperature tapping and deoxidation, refining molten steel in a refining furnace, refining molten steel in a RH vacuum furnace, and continuously casting molten steel to obtain continuous casting slabs. The specific operation is as follows:

[0029] Table 1 converter smelting metal material parameters of the present invention

[0030]

[0031] Table 2 Converter smelting endpoint index of th...

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Abstract

The invention discloses a control method of inclusions in ultra-low carbon steel and aims at solving the technical problem of high removal cost and difficulty in effective removal of aluminum oxide inclusions in the ultra-low carbon steel with the carbon content being 0.0020 percent grade at present. The control method of the inclusions in the ultra-low carbon steel comprises the following steps of 1) adopting converter top-bottom blowing; 2) conveying molten steel in a steel ladle into a refining furnace for refining treatment; 3) conveying the molten steel in the steel ladle into an RH vacuum furnace for refining treatment; and 4) performing slab continuous casting on the molten steel after refining treatment with the RH vacuum furnace to obtain a continuous cast slab. The control methodis simple in technology control, effectively removes the inclusions in the steel in the ultra-low carbon steel production process, is low in removal cost of the inclusions and is stable and reliable.

Description

technical field [0001] The present invention relates to a method for producing ultra-low carbon steel, in particular to a method for controlling inclusions in ultra-low carbon steel, in particular to a method for controlling inclusions in ultra-low carbon steel with a carbon content of 0.0020% , belongs to the technical field of steelmaking and continuous casting. Background technique [0002] The so-called 0.0020% grade ultra-low carbon steel refers to a steel grade with a carbon content of less than 0.0020% by weight in the steel. With the development of society and economy, ultra-low carbon steel is more and more widely used in the fields of automobile processing and thin plate processing, so the quality requirements for ultra-low carbon steel are becoming more and more stringent. [0003] Since the production of ultra-low carbon steel in steelmaking needs to control the carbon to a low level, it is necessary to blow a large amount of oxygen into the molten steel as a de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/35C21C7/06C21C7/10
CPCC21C5/35C21C7/06C21C7/10Y02P10/20
Inventor 刘欢徐国利韩孝永王海军郭园园
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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