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A kind of corrosion-resistant high-strength steel and its preparation method

A high-strength steel and corrosion-resistant technology, applied in the field of iron and steel smelting, can solve the problems of high strength, high toughness, low yield ratio, high elongation, high hardness, high abrasion resistance, bending performance and welding performance, and achieve high elongation High rate, good ductility, high toughness effect

Active Publication Date: 2022-04-19
SHOUGANG CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the corrosion-resistant steel cannot meet the requirements of high strength, high toughness, low yield ratio, high elongation, high hardness, high corrosion resistance, bending performance and welding performance at the same time.

Method used

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  • A kind of corrosion-resistant high-strength steel and its preparation method
  • A kind of corrosion-resistant high-strength steel and its preparation method
  • A kind of corrosion-resistant high-strength steel and its preparation method

Examples

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Comparison scheme
Effect test

Embodiment 1～8

[0074] The following examples 1-8 adopt the preparation method of the high-strength corrosion-resistant steel of the present invention to prepare the high-strength corrosion-resistant steel, including:

[0075] 1. Preparation of billets;

[0076] Among them, the billet contains: C 0.12~0.16%, Si 0.45~0.55%, Mn 4.50~5.50%, P≤0.008%, S≤0.0008%, Alt 0.01~0.05%, and the balance is iron and unavoidable impurities. See Table 1.

[0077] 2. Heating, rough rolling and finish rolling the billet to obtain hot rolled plate;

[0078] Among them, a low-temperature heating process is adopted to inhibit the growth of austenite grains and achieve full austenitization; specifically: the heating temperature is 1100-1200°C, and the holding time is 30-100min.

[0079] Two-stage rolling process is adopted to suppress the precipitation of carbides and achieve a better effect of grain refinement; specifically: the starting temperature of rough rolling is 1000-1100°C; the starting temperature of fi...

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Abstract

The invention discloses a high-strength corrosion-resistant steel, wherein, in terms of mass percentage, the high-strength corrosion-resistant steel comprises: C 0.12-0.16%, Si 0.45-0.55%, Mn 4.50-5.50%, P≤ 0.008%, S≤0.0008%, Alt 0.01~0.05%, the balance is iron and unavoidable impurities. On the basis of limiting the specific chemical composition and content of the steel, the present invention has carried out extensive and in-depth research on the preparation process, so that the obtained high-strength corrosion-resistant steel not only has high strength, high toughness, and low yield strength. Ratio, high elongation, high hardness, high wear resistance, excellent bendability and good ductility, and also has significantly improved service life and safety.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to an anti-corrosion high-strength steel and a preparation method thereof. Background technique [0002] Abrasion-resistant steel refers to steel grades that can withstand particle erosion, abrasion, cavitation formed by vortex and air, and medium corrosion in a fast-flowing slurry containing solid particles. A steel with higher abrasion resistance means a higher ability to resist slurry abrasion. Therefore, the corrosion resistance is an important mechanical performance index to evaluate the safety of corrosion-resistant steel. The level of corrosion resistance seriously affects the following aspects: the average abrasion capacity and pitting corrosion bearing capacity of steel during use; the service life and life of steel components; the operation safety of steel components. [0003] Abrasion-resistant steel is usually used in: coal mines, iron ores,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/02
CPCC22C38/02C22C38/04C22C38/06C21D8/0205C21D8/0226C21D8/0247C21D2211/008
Inventor 李少坡丁文华王志勇张海李战军王卫华樊艳秋李群马长文田士平周德光
Owner SHOUGANG CORPORATION
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