Process and device for producing medium-high manganese steel plate strip

A steel strip and high-manganese technology, applied in the field of steelmaking and smelting control, can solve the problems of manganese macro-segregation affecting steel quality, etc., and achieve the effects of shortening the smelting process, reducing production costs, and shortening production time

Active Publication Date: 2021-02-05
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a process and device for producing medium and high manganese steel strips to solve the problem that inclusions and manganese element macrosegregation affect the quality of steel in the traditional preparation process, and at the same time shorten the steel smelting process and reduce production. cost, improve the mechanical properties of steel

Method used

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  • Process and device for producing medium-high manganese steel plate strip
  • Process and device for producing medium-high manganese steel plate strip
  • Process and device for producing medium-high manganese steel plate strip

Examples

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Effect test

Embodiment 1

[0078] A preparation process for medium manganese steel strips, using a blast furnace to produce molten iron, and then performing desulfurization, desiliconization, and dephosphorization pretreatments. After pretreatment, the carbon content is 3.5wt%. Adding ferromanganese alloy will adjust the alloy composition of the molten metal to the required requirements (As the manganese component is adjusted to 6wt%), the desired metal liquid is obtained.

[0079] Step 1. The molten metal is directly poured into the twin-roll continuous casting equipment 3 through the molten metal ladle and solidified into a thin strip with a thickness of 3mm. The cooling intensity: 5000W / (m 2 k); casting speed 2m / min; pouring temperature 1700K.

[0080] Step 2. Heat the thin strip to 1415K by electromagnetic induction heating, and introduce a reducing atmosphere Ar-H in the electromagnetic induction heating device 2 , H 2 The volume content is 2%.

[0081] Step 3. The temperature of the controlled ...

Embodiment 2

[0084] In this embodiment, combined with the existing traditional converter steelmaking process, the tapping of converter is relaxed, and half-steel tapping of converter is used to shorten the converter blowing time (for example, the 120t converter smelting time is shortened from 40 minutes to 15-25 minutes).

[0085] A preparation process of medium manganese steel strip, using non-blast furnace smelting reduction to produce molten iron, then performing desulfurization, desiliconization, dephosphorization pretreatment, the carbon content after pretreatment is 3.5wt%, and then carrying out converter blowing, partial decarburization, The semi-steel is tapped, and then refined outside the furnace to adjust the alloy composition to the required requirements to obtain the required molten metal (the carbon content at this time is 1.5wt%, and the manganese composition is adjusted to 20wt%).

[0086] Step 1. The molten metal is directly poured into the twin-roll continuous casting equi...

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Abstract

The invention discloses a process and a device for producing a medium-high manganese steel plate strip, belongs to the technical field of steelmaking smelting control, and solves the problem that thequality of steel is influenced by macrosegregation of inclusions and manganese elements in the traditional preparation process. The process comprises the following steps that firstly, molten metal isdirectly subjected to continuous casting to form a thin strip with the thickness being 2-4 mm; secondly, the thin strip is heated to 1413 K to 1420 K; thirdly, the heated thin strip is fed into a controllable atmosphere decarburization furnace to be subjected to solid-state decarburization; wherein the temperature in the controllable atmosphere decarburization furnace is 1413-1420 K, a decarburization atmosphere is arranged in the controllable atmosphere decarburization furnace, the component of the decarburization atmosphere is Ar-H2-H2O, the pressure in the controllable atmosphere decarburization furnace is 0.2-1 MPa, and the PH2O/PH2 is controlled to be 0.30-0.55; fourthly, after decarburization is finished, the thin strip is rolled; and fifthly, the thin strip is rolled and then subjected to heat treatment, and the medium-high manganese steel plate strip is prepared. The process and the device are suitable for preparing the medium-high manganese steel plate strip.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and smelting control, and in particular relates to a process and a device for producing medium-high manganese steel strips. Background technique [0002] Automobile is one of the important means of transportation in modern life. Fuel consumption, pollution and safety issues are the three major challenges facing the development of the automobile industry. The improvement of the strength of automotive steel can reduce fuel consumption and pollutant emissions, while improving safety. The development of automotive steel with high strength and high plasticity has gradually become the future development trend of the automotive industry. The first and second generation of high-strength steel for automobiles can no longer meet the increasingly stringent requirements of modern automobile steel for safety, energy saving, and cost. The third-generation advanced high-strength steel represented by medium / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D3/04C21D8/02B22D11/06
CPCC21D3/04C21D8/0205C21D8/0226C21D8/0263B22D11/0622Y02P10/20
Inventor 洪陆阔艾立群孙彩娇侯耀斌周美洁周玉青孟凡峻
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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