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High-strength container steel plate and preparation method thereof

A steel plate and container technology, applied in the field of steel plate manufacturing, can solve problems not related to heat treatment performance, achieve excellent plasticity and toughness, thin steel plate, and improve plasticity and toughness

Pending Publication Date: 2022-04-08
HEBEI PUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Meet yield strength ≥ 415 MPa, tensile strength ≥ 550 MPa, elongation ≥ 22%, -60 ℃ transverse impact energy ≥ 120J, but does not involve simulated post-weld heat treatment performance, and adds precious elements Ni and Cu

Method used

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  • High-strength container steel plate and preparation method thereof
  • High-strength container steel plate and preparation method thereof
  • High-strength container steel plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-strength container steel plate and preparation method thereof after 10 mm simulated welding heat treatment.

[0034] The chemical composition of the steel sheet is: C 0.12%, Si 0.24%, Mn 1.09%, P0.014%, S 0.002%, Al 0.024, Nb 0.021%, Ti 0.011%, Cr 0.205%, and slang. For Fe and inevitable impurity elements.

[0035] The manufacturing process of the steel sheet is as follows:

[0036] The specific operation of the main process is as follows:

[0037] Kr iron water deulfur: before iron water, the rear slag is clean, the slag layer is 9mm thick, the iron water S: 0.005%;

[0038] Converter control terminal: P: 0.012%, S: 0.005%; C-T coordinate steel, slope thickness 35mm; refining process: LF furnace white slag out steel, feeding calcium lines after processing, Feeding Calculations 2.0m / t; VD vacuum Require 70Pa, hold the time of 18 minutes to ensure the bottom of the bottom of the argon 23min;

[0039] Continuous casting process: overheating (12-18 ° C) and full argon...

Embodiment 2

[0049] High-strength container steel plate and preparation method thereof after the heat treatment after 50 mm simulated welding.

[0050] The chemical composition of the steel sheet is: C 0.15%, Si 0.28%, Mn 1.33%, P0.011%, S 0.002%, Al 0.033, Nb 0.028%, Ti 0.017%, CR 0.285%, and slang. For Fe and inevitable impurity elements.

[0051] The manufacturing process of the steel sheet is as follows:

[0052] The specific operation of the main process is as follows:

[0053] Kr iron water deulfur: Before the iron water, the rear slag is clean, the slag layer is 10mm thick, the iron water S: 0.005%;

[0054] Converter control terminal: P: 0.010%, S: 0.005%; C-T coordinated steel and slag thickness of 30 mm;

[0055] Refining: LF furnace white slag out steel, feeding calcium lines 2.0m / t after processing; VD vacuum requirements 70 pa, hold time of 25min, to ensure 30 min of argon;

[0056] Continuous casting process: overheating (10-18 ° C) and full argon protection casting, continuous...

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Abstract

The invention provides a high-strength container steel plate and a preparation method thereof. The steel plate comprises the following chemical components in percentage by weight: 0.12%-0.16% of C, 0.20%-0.30% of Si, 1.05%-1.35% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.020%-0.040% of Al, 0.020%-0.030% of Nb, 0.010%-0.020% of Ti, 0.20%-0.30% of Cr and the balance of Fe and inevitable impurities. The high-strength container steel plate still has extremely high strength, plasticity and low-temperature impact toughness after simulated postweld heat treatment, and has high economic benefits.

Description

Technical field [0001] The present invention relates to the field of steel sheet manufacturing techniques, and more particularly to a high strength vessel steel plate and a preparation method thereof. Background technique [0002] High-strength container steel plates are widely used in chemical, oil, machinery, power, metallurgy, nuclear energy, aviation, ocean and other industries. It is an essential core equipment in the production process. It is an important symbol of a national equipment manufacturing level. Due to the special use of pressure vessels, such as low temperature work environments, high temperature work environments, high-voltage working environments, and possible storage of toxic and harmful working media, the working environment is bad, and the use conditions are complicated. With the development of the national economy, the strength of the boiler pressure vessel is getting higher and higher. Under the production conditions of the existing boiler pressure vessel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/26C22C38/28C21D1/18C21D8/02B21B37/74B21B1/46C22C33/04
Inventor 王智聪庞洪轩陈建超郭潇郑磊付中原关秀格任新凯李占强和珍宝高东风申维纳朱玉涛冯晓鹏
Owner HEBEI PUYANG IRON & STEEL
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