Low-alloy and high-strength steel plate for anticorrosion, and production method thereof

A technology of high-strength steel plates and production methods, applied in the field of metallurgy, can solve problems such as shortages and restrictions on the development of national economic construction, and achieve the effects of good organization, excellent resistance to hydrogen sulfide corrosion, and improved purity

Inactive Publication Date: 2018-03-02
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, due to the lack of necessary production equipment and technical support, and because there is no domestic production of H 2 0-H 2 The mature experience of corrosion-resistant low-alloy high-strength steel plates in the S-HCL environment cannot meet the needs of the domestic market and seriously restricts the development of my country's national economic construction.

Method used

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  • Low-alloy and high-strength steel plate for anticorrosion, and production method thereof
  • Low-alloy and high-strength steel plate for anticorrosion, and production method thereof
  • Low-alloy and high-strength steel plate for anticorrosion, and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The thickness of the low-alloy high-strength steel plate for corrosion resistance in this example is 75 mm, and its chemical composition and mass percentage are: C: 0.08%, Si: 0.40%, Mn: 0.70%, P: 0.010%, S: 0.003%, Al: 0.40%, Cr: 2.25%, Mo: 0.43%, Cu: 0.01%, Ni: 0.01%, and the balance is Fe and unavoidable impurities.

[0043] The production method of the corrosion-resistant low-alloy high-strength steel plate in this embodiment includes smelting, continuous casting, heating, rolling and heat treatment processes, and the specific process steps are as follows:

[0044] (1) Smelting process: The molten steel is first smelted in the primary smelting furnace, and then sent to the LF refining furnace for refining. The amount of slag is increased and the slag is flowed multiple times. 3.5kg / t molten steel for aluminum wire and 2kg / t molten steel for Si-Ca wire are fed in the middle, the vacuum degree is 66Pa during vacuum treatment, and the vacuum holding time is 25min;

[...

Embodiment 2

[0053] The thickness of the corrosion-resistant low-alloy high-strength steel plate in this example is 65mm, and its chemical composition and mass percentage are: C: 0.08%, Si: 0.33%, Mn: 0.73%, P: 0.010%, S: 0.003%, Al: 0.41%, Cr: 2.26%, Mo: 0.41%, Cu: 0.01%, Ni: 0.01%, and the balance is Fe and unavoidable impurities.

[0054] The production method of the corrosion-resistant low-alloy high-strength steel plate in this embodiment includes smelting, continuous casting, heating, rolling and heat treatment processes, and the specific process steps are as follows:

[0055] (1) Smelting process: The molten steel is first smelted in the primary smelting furnace, and then sent to the LF refining furnace for refining. The amount of slag is increased and the slag is flowed multiple times. 3.0kg / t molten steel for aluminum wire and 1.8kg / t molten steel for Si-Ca wire are fed in the middle, the vacuum degree is 65Pa during vacuum treatment, and the vacuum holding time is 25min;

[0056...

Embodiment 3

[0064] The thickness of the low-alloy high-strength steel plate for corrosion resistance in this example is 30 mm, and its chemical composition and mass percentage are: C: 0.07%, Si: 0.38%, Mn: 0.75%, P: 0.010%, S: 0.003%, Al: 0.40%, Cr: 2.20%, Mo: 0.43%, Cu: 0.01%, Ni: 0.01%, and the balance is Fe and unavoidable impurities.

[0065] The production method of the corrosion-resistant low-alloy high-strength steel plate in this embodiment includes smelting, continuous casting, heating, rolling and heat treatment processes, and the specific process steps are as follows:

[0066] (1) Smelting process: The molten steel is first smelted in the primary smelting furnace, and then sent to the LF refining furnace for refining. The amount of slag is increased and the slag is flowed multiple times. 3.5kg / t molten steel for aluminum wire and 1.6kg / t molten steel for Si-Ca wire are fed in the middle, the vacuum degree is 65Pa during vacuum treatment, and the vacuum holding time is 25min;

...

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Abstract

The invention discloses a corrosion-resistant low-alloy high-strength steel plate and a production method. The chemical composition and mass percentage of the steel plate are: C: 0.07-0.10%, Si: 0.30-0.40%, Mn: 0.65-0.85 %, P≤0.010%, S≤0.005%, Al: 0.30~0.50%, Cr: 2.15~2.35%, Mo: 0.35~0.50%, Cu≤0.20%, Ni≤0.20%, the balance is Fe and unavoidable impurities; steel plate production methods include smelting, continuous casting, heating, rolling and heat treatment processes. The steel plate of the present invention has the characteristics of high density, moderate strength level and hardness, excellent low-temperature impact toughness at -20°C and excellent hydrogen sulfide corrosion resistance, good comprehensive performance and welding performance, and can meet the requirements of hydrogen sulfide corrosion resistant steel for pressure vessels. Require.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a corrosion-resistant low-alloy high-strength steel plate and a production method, in particular to a H 2 0-H 2 Low-alloy high-strength steel plate for corrosion resistance in S-HCL environment and production method. Background technique [0002] In recent years, with the rapid development of national economic construction, for H 2 0-H 2 The demand for corrosion-resistant low-alloy high-strength steel plates in the S-HCL environment is increasingly prominent, and the market for H 2 0-H 2 The demand for low-alloy high-strength steel plates for corrosion resistance in S-HCL environments is increasing. For a long time, due to the lack of necessary production equipment and technical support, and because there is no domestic production of H 2 0-H 2 The mature experience of corrosion-resistant low-alloy high-strength steel plates in the S-HCL environment cannot meet the needs o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C22C38/02C22C38/04C22C38/06C22C38/20C22C38/22C22C38/42C22C38/44
CPCC22C38/02C21D8/0226C21D8/0247C22C38/04C22C38/06C22C38/20C22C38/22C22C38/42C22C38/44
Inventor 邓建军赵文忠李杰龙杰莫德敏陈起赵红康
Owner WUYANG IRON & STEEL
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