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Wear-resistant and corrosion-resistant high-strength steel and preparation method thereof

A corrosion-resistant, high-strength steel 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 wear resistance, bending performance and welding performance, etc., to achieve high elongation. rate, inhibit carbide precipitation, and improve the effect of grain refinement

Active Publication Date: 2021-06-25
SHOUGANG CORPORATION
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  • Summary
  • 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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  • Wear-resistant and corrosion-resistant high-strength steel and preparation method thereof
  • Wear-resistant and corrosion-resistant high-strength steel and preparation method thereof
  • Wear-resistant and corrosion-resistant high-strength steel and preparation method thereof

Examples

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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 wear-resistant and corrosion-resistant high-strength steel. The wear-resistant and corrosion-resistant high-strength steel comprises the following components in percentage by mass: 0.12%-0.16% of C, 0.45%-0.55% of Si, 4.50%- 5.50% of Mn, not greater than 0.008% of P, not greater than 0.0008% of S, 0.01%-0.05% of Alt and the balance of iron and inevitable impurities. According to the invention, on the basis of limiting the specific chemical components and contents of the steel, a preparation process is greatly and deeply studied, so that the obtained wear-resistant and corrosion-resistant high-strength steel has high strength, high toughness, low yield ratio, high elongation, high hardness, high wear resistance, excellent bendability and good ductility, and further has remarkably prolonged service life and remarkably improved 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 Applications(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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