Thick steel plate for pressure vessel, method for manufacturing the same, use of the same

A technology for a pressure vessel and a manufacturing method, applied in the field of iron and steel materials, can solve problems such as not being able to fully meet actual needs, and achieve the effects of facilitating the implementation of a heat treatment process, excellent low-temperature impact toughness, and easy implementation

Active Publication Date: 2009-08-26
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The steel disclosed in JP63053243A can be used for nuclear reactor pressure vessels. It is alloyed with Ni and Mo on the basis of the composition of low-carbon manganese

Method used

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  • Thick steel plate for pressure vessel, method for manufacturing the same, use of the same
  • Thick steel plate for pressure vessel, method for manufacturing the same, use of the same

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0043] Example 1

[0044] Smelt according to the chemical composition shown in Table 2, and cast into a steel billet. The steel billet is hot rolled at 1100 to 1250°C, and the hot rolling deformation is more than 80%. After the rolling, the steel plate is heat-treated, heated at 910°C and kept warm, and then immediately sprayed with water to quickly cool to below 200°C, and then tempered at 640°C. The thickness of the finished steel plate is 40mm.

Example Embodiment

[0045] Example 2

[0046] The embodiment is the same as in Example 1, wherein the heating temperature during the heat treatment is 930°C, the tempering temperature is 620°C, and the thickness of the finished steel plate is 20mm.

Example Embodiment

[0047] Example 3

[0048] The embodiment is the same as in Example 1, wherein the heating temperature during the heat treatment is 890°C, the tempering temperature is 670°C, and the thickness of the finished steel plate is 70mm.

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Abstract

The invention provides a thick steel plate for a pressure vessel, a method for manufacturing the same and use of the same. The thick steel plate comprises the following chemical components: 0.08 to 0. 20 weight percent of C, 0.10 to 0.40 weight percent of Si, 1.0 to 1.6 weight percent of Mn, less than or equal to 0.01 weight percent of S, less than or equal to 0.012 weight percent of P, 0.015 to 0.05 weight percent of Al, 0.40 to 0.60 weight percent of Mo, less than or equal to 0.10 weight percent of Cu, 0. 40 to 0.80 weight percent of Ni, less than or equal to 0.05 weight percent of V, less than or equal to 0.008 weight percent of N, and the balance of Fe and inevitable impurities. Alloying and heat treatment ensure the high strength, excellent toughness and other characteristics of the thick steel plate. The product of the method can replace pressure vessel made of a forged piece, and is particularly suitable for manufacturing cylinders, sealing plug and the like for nuclear reactor pressure vessels, evaporators and stabilizers.

Description

technical field [0001] The invention relates to the field of iron and steel materials. Specifically, the invention relates to low-carbon low-alloy steel. More specifically, the invention relates to a high-strength quenched and tempered thick steel plate for pressure vessels and its application in the nuclear power industry. Background technique [0002] The basic requirements of steel for pressure vessels are high strength, good plasticity, toughness, manufacturing performance and compatibility with media. In terms of mechanical properties: First of all, the material used to manufacture pressure vessels should have appropriate strength (mainly referring to yield strength and tensile strength) to prevent plastic deformation or even fracture when subjected to pressure. Secondly, the material used to make the pressure vessel must have good plasticity to prevent the pressure vessel from being damaged due to accidental overloading during use. Third, the material used to manufact...

Claims

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Application Information

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IPC IPC(8): C22C38/46B21B1/22C21D9/52
Inventor 唐文军杨才定张汉谦
Owner BAOSHAN IRON & STEEL CO LTD
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