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Aluminum-containing high-strength steel and preparation method and application of aluminum-containing high-strength steel

A technology of high-strength steel and chemical composition, applied in the field of steel rolling, which can solve problems such as chromatic aberration

Active Publication Date: 2021-01-08
SHOUGANG CORPORATION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an aluminum-containing high-strength steel and its preparation method and application, which solves a series of color difference problems in the prior art after galvanizing the aluminum-containing high-strength steel

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  • Aluminum-containing high-strength steel and preparation method and application of aluminum-containing high-strength steel

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Embodiment 1 to Embodiment 5

[0069] Embodiment 1 to embodiment 5 provide a kind of aluminum-containing high-strength steel and its preparation method and application. The preparation method is as follows:

[0070] The slab obtained by continuous casting is placed in a heating furnace for heating. During heating, the temperature of the first stage of heating is 700-800°C, the temperature of the second stage of heating is 1150-1190°C, the temperature of the soaking section is 1190-1220°C, and the total heating time is 130-160 minutes, followed by two passes of rough rolling and finish rolling for descaling, finish rolling, ultra-fast cooling and coiling to obtain hot-rolled coils. Among them, the pressure of descaling water in the two passes of finishing rolling is 23MPa, and the ultra-fast cooling adopts laminar flow cooling front-end cooling mode,

[0071] Hot-rolled coils are pickled and cold-rolled, followed by continuous annealing to obtain high-strength steel. The cold rolling is 5 passes of continuo...

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Abstract

The invention provides aluminum-containing high-strength steel and a preparation method and application of the aluminum-containing high-strength steel. The aluminum-containing high-strength steel is prepared from the following chemical components including, by mass: 0.1% to 0.2% of C, 0.3% to 0.6% of Si, 2% to 3% of Mn, less than or equal to 0.0015% of P, less than or equal to 0.0015% of S, 0.5% to 1% of Al, 0.1% to 0.3% of Mo, 0.01% to 0.05% of Pb and the balance of Fe and inevitable impurities. The aluminum-containing high-strength steel provided is good in surface and free of chromatic aberration defects after being galvanized.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to an aluminum-containing high-strength steel and a preparation method and application thereof. Background technique [0002] High-strength steel can be used to make auto parts because of its good strength and safety requirements. In addition, high-strength steel used in automotive parts should also have excellent formability, good corrosion resistance, weldability and coating performance. With the development, high-strength steel is gradually applied to visible parts. For example, 400MPa high-strength steel is used to make doors and thresholds, 590MPa high-strength steel is used to make door inner panels, and 980MPa-1470MPa high-strength steel is used. Inner panel reinforcements, etc. [0003] Aluminum-containing high-strength steel is used as a part of the visible position, and the requirements for surface quality are getting higher and higher. Before its use,...

Claims

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Application Information

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IPC IPC(8): C22C38/06C22C38/02C22C38/04C22C38/12C22C38/60C21D8/02
CPCC22C38/06C22C38/02C22C38/04C22C38/12C22C38/60C21D8/0205C21D8/0236C21D8/0263C21D8/0273
Inventor 王畅于洋王林张亮亮高小丽刘文鑫王泽鹏张栋陈瑾吴耐焦会立
Owner SHOUGANG CORPORATION
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