A kind of aluminum-containing high-strength steel and its preparation method and application

A technology of high-strength steel and mass fraction, applied in the field of steel rolling, can solve problems such as color difference, achieve the effect of inhibiting external oxidation, avoiding color difference defects, and promoting internal oxidation

Active Publication Date: 2022-01-18
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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  • A kind of aluminum-containing high-strength steel and its preparation method and application
  • A kind of aluminum-containing high-strength steel and its preparation method and application
  • A kind of aluminum-containing high-strength steel and its preparation method and application

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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 an aluminum-containing high-strength steel and its preparation method and application. The high-strength steel is composed of the following chemical components in mass fractions: C: 0.1-0.2%, Si: 0.3-0.6%, Mn: 2-3%, P≤0.0015%, S≤0.0015%, Al: 0.5-1%, Mo: 0.1-0.3%, Pb: 0.01-0.05%, and the rest are Fe and unavoidable impurities. The aluminum-containing high-strength steel provided by the invention has a good surface after galvanizing without color difference defects.

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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Patent Type & Authority Patents(China)
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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