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Short-flow preparation method for high-strength-ductility medium manganese steel thin strip

A high-strength plastic product, short process technology, applied in metal rolling and other directions, can solve the problems of high energy consumption and long preparation process, and achieve the effect of reducing energy consumption, shortening production process, and good flatness

Active Publication Date: 2018-10-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a short-process preparation method of high-strength plastic product medium manganese steel strip, and prepare high-strength plastic product medium manganese steel strip through a short process and low energy consumption method to solve the problem of existing hot-rolled medium manganese steel strips. The traditional preparation process is long and the energy consumption is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, molten steel is smelted according to the set composition. The smelting process is: pre-desulfurization of molten iron, converter smelting, argon station, and RH vacuum furnace refining. The composition is: C 0.3%, Mn 4%, Si 0.5% , Al 2%, V 0.08%, P 0.001%, O 0.001%, N 0.001%, S 0.005%, and the balance is Fe;

[0025] The molten steel is poured into the tundish, then poured into the cloth ladle from the tundish, and finally poured from the cloth ladle into the twin-roll strip continuous casting equipment. The superheat of the molten steel on the upper surface of the molten pool is controlled at 35°C. Rolling to obtain a cast strip with a thickness of 2.5 mm;

[0026] After the cast strip is cooled to the starting rolling temperature, hot rolling is carried out one time. The starting rolling temperature is 1250°C, the total reduction of hot rolling is 50%, and the final rolling temperature is 1150°C;

[0027] After the hot-rolled sheet exits the hot-r...

Embodiment 2

[0031] In this embodiment, molten steel is smelted according to the set composition. The smelting process is: pre-desulfurization of molten iron, converter smelting, argon station, and RH vacuum furnace refining. The composition is: C 0.18%, Mn 4.5%, Si 1%. , Al 1.5%, V0.05%, P 0.002%, O 0.002%, N 0.001%, S 0.003%, and the balance is Fe;

[0032] The molten steel is poured into the tundish, then poured into the cloth ladle from the tundish, and finally poured from the cloth ladle into the twin-roll thin strip continuous casting equipment. Rolling to obtain a cast strip with a thickness of 2mm;

[0033] After the cast strip is cooled to the starting rolling temperature, hot rolling is carried out one time. The starting rolling temperature is 1000°C, the total reduction of hot rolling is 30%, and the final rolling temperature is 900°C;

[0034] After the hot-rolled sheet leaves the hot-rolling mill, it is cooled to 400°C by an ultra-fast cooling system at a rate of 100°C / s for ...

Embodiment 3

[0038] In this embodiment, molten steel is smelted according to the set composition. The smelting process is: pre-desulfurization of molten iron, converter smelting, argon station, and LF ladle furnace refining. The composition is: C 0.15%, Mn 3.5%, Si 0.8% , Al 2.5%, V0.08%, P 0.0012%, O 0.0013%, N 0.002%, S 0.001%, and the balance is Fe;

[0039] The molten steel is poured into the tundish, then poured into the cloth ladle from the tundish, and finally poured from the cloth ladle into the twin-roll strip continuous casting equipment. The superheat of the molten steel on the upper surface of the molten pool is controlled at 10°C. Rolling to obtain a cast strip with a thickness of 1.5mm;

[0040]After the cast strip is cooled to the starting rolling temperature, hot rolling is carried out one time. The starting rolling temperature is 1100°C, the total reduction of hot rolling is 50%, and the final rolling temperature is 1000°C;

[0041] After the hot-rolled sheet exits the ho...

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Abstract

The invention belongs to the technical field of steel alloy materials and particularly relates to a short-flow preparation method for a high-strength-ductility medium manganese steel thin strip. The high-strength-ductility medium manganese steel strip comprises C, Mn, Si, Al, V, P, O, N,S and the balance Fe, wherein by mass percentage, C is greater than or equal to 0.15% and smaller than or equalto 0.3%, Mn is greater than or equal to 3.5% and smaller than or equal to 4.5%, Si is greater than or equal to 0.5% and smaller than or equal to 1%, Al is greater than or equal to 1.5% and smaller than or equal to 2.5%, V is smaller than or equal to 0.08%, P is smaller than or equal to 0.002%, O is smaller than or equal to 0.002%, N is smaller than or equal to 0.002% and S is smaller than or equalto 0.005%. The preparation method comprises the following steps of (1), molten steel melting,( 2), pouring into a tundish, (3), pouring into cloth flow bags, (4), casting and rolling with double-rollthin strip continuous casting equipment, (5), one pass of hot rolling of the cast strip, and curling after ultra-fast cooling, and (6), continuous annealing. According to the preparation process forthe high-strength-ductility medium manganese steel thin strip, a method of combining double-roll thin strip continuous casting and continuous annealing is adopted, so that the production process is shortened, the energy consumption is reduced, and the production efficiency is improved.

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 a high-strength plastic product medium manganese steel thin strip. Background technique [0002] Lightweight automobiles and improved safety during collisions are important requirements for the development of the automobile industry in recent years. The use of advanced high-strength steel for automotive materials is an important means to achieve lightweight automobiles and improve collision safety. Therefore, advanced high-strength steel for automobiles is an important research hotspot. At present, advanced high-strength steel for automobiles has been developed to the third generation, and medium manganese steel is a typical third-generation advanced high-strength steel. Compared with the high-manganese steel in the second generation of advanced high-strength steel, the alloy content of the medium-manganese...

Claims

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Application Information

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IPC IPC(8): B22D11/06B21B1/46C21D8/02
CPCB21B1/463B22D11/0622C21D8/0205C21D8/0226C21D8/0273
Inventor 袁国王鹤松康健曹光明李成刚张元祥王国栋
Owner NORTHEASTERN UNIV