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Short-process preparation method of thin specification high-manganese steel plate

A thin-gauge, short-process technology, which is applied in the field of short-process preparation of thin-gauge high-manganese steel sheets, achieves good quality, reduces the thickness of iron oxide scale, and prevents high-temperature oxidation.

Active Publication Date: 2018-11-13
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a short-process preparation method for thin-gauge high-manganese steel plates, and prepare high-manganese steel thin strips through a short process, low energy consumption, and near-net forming method to solve the current problems. There are technical problems in the preparation process of high manganese steel plate

Method used

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  • Short-process preparation method of thin specification high-manganese steel plate

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Experimental program
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Embodiment 1

[0028] In this embodiment, the short-process preparation method of thin-gauge high-manganese steel plate includes the following steps:

[0029] (1) Melt molten steel according to the stated composition. The smelting process is: pre-desulfurization of molten iron, converter smelting, argon station, and LF ladle furnace refining. The composition by mass percentage is: C 0.015%, Mn 15%, Si 3%, Al 3 %, P 0.003%, O 0.002%, N 0.002%, S 0.003%, and the balance is Fe.

[0030] (2) Control the temperature of the molten steel on the upper surface of the ladle to 1730°C, preheat the temperature of the tundish to 1350°C, preheat the temperature of the ladle to 1330°C, and preheat the temperature of the side sealing plate to 1300°C, pour the molten steel in the ladle poured into the tundish, then poured from the tundish into the cloth flow ladle, and then poured from the cloth flow ladle into the twin-roll thin strip continuous casting equipment. Obtain a cast strip with a thickness of 3....

Embodiment 2

[0035] In this embodiment, the short-process preparation method of thin-gauge high-manganese steel plate includes the following steps:

[0036] (1) Smelting molten steel according to the stated composition, the smelting process is: pre-desulfurization of molten iron, converter smelting, argon station, LF ladle furnace refining, the composition by mass percentage is: C 0.3%, Mn 25%, Si 1%, Al 3 %, P 0.002%, O 0.001%, N 0.0012%, S 0.0013%, and the balance is Fe.

[0037] (2) Control the temperature of the molten steel on the upper surface of the ladle to 1710°C, preheat the temperature of the tundish to 1300°C, preheat the temperature of the ladle to 1280°C, preheat the temperature of the side sealing plate to 1250°C, pour the molten steel in the ladle poured into the tundish, then poured from the tundish into the cloth flow ladle, and then poured from the cloth flow ladle into the twin-roll thin strip continuous casting equipment. Obtain a cast strip with a thickness of 3mm; ...

Embodiment 3

[0042] In this embodiment, the short-process preparation method of thin-gauge high-manganese steel plate includes the following steps:

[0043] (1) Smelting molten steel according to the stated composition, the smelting process is: pre-desulfurization of molten iron, converter smelting, argon station, LF ladle furnace refining, the composition by mass percentage is: C 0.2%, Mn 20%, Si 1.2%, Al 1.5 %, P 0.0013%, O0.0012%, N0.002%, S 0.0013%, and the balance is Fe.

[0044] (2) Control the temperature of the molten steel on the upper surface of the ladle to 1720°C, preheat the temperature of the tundish to 1330°C, preheat the temperature of the ladle to 1300°C, and preheat the temperature of the side sealing plate to 1280°C, pour the molten steel in the ladle poured into the tundish, then poured from the tundish into the cloth flow ladle, and then poured from the cloth flow ladle into the twin-roll thin strip continuous casting equipment. Obtain a cast strip with a thickness of...

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Abstract

The invention belongs to the technical field of steel alloy materials and particularly relates to a short-process preparation method of a thin specification high-manganese steel plate. Elements of thethin specification high-manganese steel plate comprise, by mass percent, larger than or equal to 0.015% and smaller than or equal to 0.3% of C, larger than or equal to 15% and smaller than or equal to 25% of Mn, larger than or equal to 1% and smaller than or equal to 3% of Si, larger than or equal to 1.5% and smaller than or equal to 3% of Al, smaller than or equal to 0.003% of P, smaller than orequal to 0.002% of O, smaller than or equal to 0.002% of N, smaller than or equal to 0.003% of S and the balance Fe. The preparation method comprises the following steps that molten steel is smelted,and a tundish, a flow distribution bag and a side sealing plate are preheated; 2, the tundish is poured in; 3, the flow distribution bag is poured; 4, double-roller thin-strip casting equipment is utilized for cast rolling; 5, one-pass hot rolling is carried out after cooling is carried out in nitrogen protective atmosphere; 6, curling is carried out after air cooling; 7, acid pickling is carriedout; 8, cold rolling is carried out; and 9, annealing is carried out on the nitrogen atmosphere protecting condition. The thickness of the thin specification high-manganese steel plate is 0.47-1.2 mm, the width is 500-2000 mm, the extension strength is 750-1400 MPa, and the break ductility is 30-80%. The technology is a short-process near-end forming technology, and the method has the beneficialeffects of being low in cost, low in energy consumption and the like.

Description

technical field [0001] The invention belongs to the technical field of iron and steel alloy materials, and in particular relates to a short-process preparation method of thin-gauge high-manganese steel plates. Background technique [0002] With the development of the automobile industry, automobile lightweight, safety, energy saving, and emission reduction have become the main and important development goals. Advanced high-strength steel is an important structural material for automobiles, and its application is an important method to realize automobile lightweight and improve crash safety. Interstitial-free steel (IF), dual-phase steel (DP), transformation-induced plasticity steel (TRIP), and martensitic steel (M) are typical first-generation advanced high-strength steels for automobiles, but their strength-ductility products are 10-20GPa%, can no longer meet the further demand for future automotive steel. High-manganese steel is a typical second-generation automobile ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02B21B1/46B22D11/06B22D11/18B22D11/22C22C38/02C22C38/04C22C38/06
CPCB21B1/463B22D11/0622B22D11/18B22D11/22C21D8/0205C21D8/0215C21D8/0226C21D8/0236C21D8/0247C22C38/02C22C38/04C22C38/06
Inventor 袁国王鹤松康健曹光明李成刚张元祥王国栋
Owner NORTHEASTERN UNIV
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