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A short process preparation method for thin gauge high manganese steel plate

A thin-gauge, short-process technology, applied in the field of short-process preparation of thin-gauge high manganese steel plates, to achieve good quality, reduce the thickness of oxide scale, and prevent high-temperature oxidation

Active Publication Date: 2020-03-20
NORTHEASTERN UNIV LIAONING
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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

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  • A short process preparation method for thin gauge high manganese steel plate

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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 3 mm; ...

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 specifically relates to a short-process preparation method of thin-specification high-manganese steel plates. The composition of thin specification high manganese steel plate in mass percentage is: 0.015≤C≤0.3%, 15≤Mn≤25%, 1%≤Si≤3%, 1.5%≤Al≤3%, P≤0.003%, O≤0.002 %, N≤0.002%, S≤0.003%, and the balance is Fe. The preparation method is as follows: (1) Melt molten steel, preheat the tundish, ladle, and side sealing plate; (2) Pour into the tundish; (3) Pour into the ladle; (4) Use double-roller thin strip continuous casting Equipment casting and rolling; (5) hot rolling after cooling in nitrogen protective atmosphere; (6) air cooling and then curling; (7) pickling; (8) cold rolling; (9) annealing under nitrogen atmosphere protection. The thickness of thin high manganese steel plate is 0.47~1.2mm, the width is 500~2000mm, the tensile strength is 750~1400MPa, and the elongation after break is 30~80%. The technology of the present invention is a short-process near-net forming technology, which has the characteristics of low cost and low energy consumption.

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 Patents(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 LIAONING