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Flexible production method of steel for pressure vessel

A pressure vessel and flexible production technology, applied in the field of iron and steel metallurgy, can solve problems such as affecting the delivery period, complex production processes, restricting production efficiency, etc., to improve the level of large-scale production and intensive management, optimize production processes, and improve production rhythm and management efficiency

Active Publication Date: 2022-04-15
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the iron and steel metallurgy industry, there are many types of steel for medium and heavy plates, and the production process is complicated. Among them, 12MnNiVR, a typical steel type for pressure vessels, adopts a relatively simple production process route and is relatively solidified, which is easily affected by the allocation of rolling and heat treatment resources. restrictions, thus restricting its production efficiency and affecting the delivery period

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] In this example, the grade of the steel for the pressure vessel is 12MnNiVR, and the chemical composition of the steel plate is C: 0.11%, Si: 0.25%, Mn: 1.47%, Ni: 0.027%, Mo: 0.08%, P: 0.0 : 08%, S: 0.007%, V: 0.02%, Cu: 0.11%, Als: 0.03%, and the rest are Fe and unavoidable impurities. The thickness of the finished steel plate is 28mm.

[0060] The steel for the pressure vessel described in this example is produced by process route 1 (i.e. "offline quenching + tempering"), and the processes involved are: molten iron pretreatment - converter smelting - LF refining - RH refining - continuous casting - slab heating - Rolling-straightening-stacking slow cooling-flaw detection-quenching-tempering-cutting-inspection-warehousing; the specific process is as follows:

[0061] 1. Before steelmaking, carry out desulfurization pretreatment of molten iron, remove desulfurization slag, use aluminum and iron for deoxidation, and determine the amount of aluminum and iron to be added...

Embodiment 2

[0069] In this example, the grade of the steel for the pressure vessel is 12MnNiVR, and the chemical composition of the steel plate is C: 0.11%, Si: 0.25%, Mn: 1.47%, Ni: 0.027%, Mo: 0.08%, P: 0.0: 08%, S: 0.007%, V: 0.02%, Cu: 0.11%, Als: 0.03%, and the rest are Fe and unavoidable impurities. The thickness of the finished steel plate is 28mm.

[0070] The steel for the pressure vessel described in this example is produced by the process path 2 (i.e. "online TMCP + tempering"), and the processes involved are: molten iron pretreatment - converter smelting - LF refining - RH refining - continuous casting - slab heating - control Rolling - controlled cooling - straightening - stacking slow cooling - flaw detection - tempering - cutting - inspection - storage. The specific process is as follows:

[0071] 1. Before steelmaking, carry out desulfurization pretreatment of molten iron, remove desulfurization slag, use aluminum and iron for deoxidation, and determine the amount of alu...

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Abstract

The invention relates to a flexible production method of steel for a pressure vessel, which adopts the following two process paths for production: a process path I comprises an off-line quenching and tempering process, and a process path II comprises an on-line TMCP and tempering process. According to the production method, the same steel grade is produced by adopting different production paths, and the mechanical properties of the finished steel plate can meet the standard requirements of GB 19189-2011 hardened and tempered high-strength steel plate for pressure vessels, so that the aims of improving the production rhythm and the management efficiency are fulfilled, and the large-scale production and intensive management levels of enterprises are improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a flexible production method of steel for pressure vessels. Background technique [0002] In the iron and steel metallurgy industry, there are many types of steel for medium and heavy plates, and the production process is complicated. Among them, 12MnNiVR, a typical steel type for pressure vessels, adopts a relatively simple production process route and is relatively solidified, which is easily affected by the allocation of rolling and heat treatment resources. restrictions, thus restricting its production efficiency and affecting the delivery period. It is urgent to adopt the flexible production method of "one steel with multiple paths" to optimize its production process, so as to realize the production of the same steel grade with different production paths, and ensure that its mechanical properties can meet the standard requirements, thereby improving the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/12C22C38/16C22C38/06C21D1/18C21D8/02
Inventor 张坤隋广雨肖青松姚震周强
Owner ANGANG STEEL CO LTD
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