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Thin-gauge high-performance ultrahigh-strength semi-hard steel belt and production method thereof

A production method and high-performance technology, applied in the field of metallurgy, to achieve high n and K values, high tensile strength, and reduced fuel consumption

Active Publication Date: 2019-03-08
TANGSHAN STAINLESS STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no uniform product standard for the ultra-high-strength semi-hard steel strip studied, and the CR700 / 900MS product standard is used to test it according to its main target use

Method used

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  • Thin-gauge high-performance ultrahigh-strength semi-hard steel belt and production method thereof
  • Thin-gauge high-performance ultrahigh-strength semi-hard steel belt and production method thereof
  • Thin-gauge high-performance ultrahigh-strength semi-hard steel belt and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, the thickness of the thin-gauge, high-performance, ultra-high-strength semi-hard steel strip is 2.0 mm, and its chemical composition and mass percentage are shown in Table 1.

[0031] The production method of the thin-gauge high-performance ultra-high-strength semi-hard steel strip in this embodiment includes converter smelting, LF refining, continuous casting, heating, rough rolling, finish rolling, cooling, coiling and cold rolling. The specific process steps are as follows:

[0032] (1) Continuous casting process: control component segregation through stable casting speed, casting speed 1.45m / min, continuous casting to obtain a billet with a thickness of 200mm and a width of 1280mm, the chemical composition and mass percentage of the continuous casting billet are shown in Table 1;

[0033] (2) Heating process: heating by a walking heating furnace, the total residence time in the heating furnace is 200min, the heating temperature in the soaking sect...

Embodiment 2

[0041] In this embodiment, the thickness of the thin-gauge, high-performance, ultra-high-strength semi-hard steel strip is 1.8 mm, and its chemical composition and mass percentage are shown in Table 1.

[0042] The production method of the thin-gauge high-performance ultra-high-strength semi-hard steel strip in this embodiment includes converter smelting, LF refining, continuous casting, heating, rough rolling, finish rolling, cooling, coiling and cold rolling. The specific process steps are as follows:

[0043] (1) Continuous casting process: control component segregation through stable casting speed, casting speed 1.50m / min, continuous casting to obtain a billet with a thickness of 200mm and a width of 1250mm, the chemical composition and mass percentage of the continuous casting billet are shown in Table 1;

[0044] (2) Heating process: heating by a walking heating furnace, the total residence time in the heating furnace is 208 minutes, the heating temperature in the soaking s...

Embodiment 3

[0052] In this embodiment, the thickness of the thin-gauge, high-performance, ultra-high-strength semi-hard steel strip is 1.6 mm, and its chemical composition and mass percentage are shown in Table 1.

[0053] The production method of the thin-gauge high-performance ultra-high-strength semi-hard steel strip in this embodiment includes converter smelting, LF refining, continuous casting, heating, rough rolling, finish rolling, cooling, coiling and cold rolling. The specific process steps are as follows:

[0054] (1) Continuous casting process: control component segregation through stable casting speed, casting speed 1.40m / min, continuous casting to obtain a billet with a thickness of 210mm and a width of 1300mm, the chemical composition and mass percentage of the continuous casting billet are shown in Table 1;

[0055] (2) Heating process: heating by a walking heating furnace, the total residence time in the heating furnace is 210min, the heating temperature in the soaking sect...

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Abstract

The invention discloses a thin-gauge high-performance ultrahigh-strength semi-hard steel belt and a production method thereof. The steel belt is prepared from the chemical components in percentage bymass: 0.15 to 0.20 percent of C, 0.90 to 1.20 percent of Mn, less than or equal to 0.015 percent of S, less than or equal to 0.020 percent of P, 0.05 to 0.10 percent of Si, 0.025 to 0.050 percent of Als, less than or equal to 0.0050 percent of N, 0.32 to 0.40 percent of Ceq, and the balance iron and inevitable impurities. The production method comprises the processes of smelting through a converter, ladle furnace (LF) refining, continuous casting, heating, rough rolling, finish rolling, cooling, reeling and cold rolling. According to the thin-gauge high-performance ultrahigh-strength semi-hardsteel belt and the production method thereof provided by the invention, by adopting the composition design of low carbon and conventional manganese, and through a cooling path and medium-temperaturereeling control, the obtained thin-gauge high-performance ultrahigh-strength semi-hard steel belt is suitable for producing cold roll forming thin-wall steel sections such as bus frameworks, truck edge beams and penetrating beams, so that the weight of a car body is reduced, the fuel oil consumption is reduced, and the product can be manufactured in a green way.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a thin-gauge high-performance ultra-high-strength semi-hard steel strip and a production method thereof. Background technique [0002] With the increasing requirements of the automobile market for energy saving, environmental protection, safety, and comfort, the lightweight of automobile bodies has become an important development direction of today's automobile technology development. Because high-strength steel and ultra-high-strength steel can reduce the weight of the car body while improving the structural strength and energy absorption capacity of the car body, high-strength steel and ultra-high-strength steel are still one of the most economical and effective ways to reduce weight. [0003] With the development of the automobile industry, the light weight of domestic commercial vehicles is developing. In order to reduce weight, more and more commercial vehicle...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/02
CPCC21D8/0226C21D8/0236C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06
Inventor 张玉文王朋飞闫萍李博贾丽慧吕苗苗李宽吴汉科李建设
Owner TANGSHAN STAINLESS STEEL
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