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Deoxidation technique used in low-alloy steel smelting process

A smelting process, low-alloy steel technology, applied in the field of deoxidation process, to achieve the effect of increasing strength, reducing production cost, and reducing usage

Inactive Publication Date: 2016-04-27
邬青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the mechanism of oxide metallurgy technology has not yet formed a unified point of view, therefore, all companies are very cautious and strictly confidential about the application of this technology in production, but this technology is very important for improving high-strength low-alloy steel It is of great significance to promote the development of ultra-fine grain steel grades and the solidification, pressure processing, production of non-quenched and tempered steel and thick plate steel other than welding.

Method used

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  • Deoxidation technique used in low-alloy steel smelting process
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Embodiment

[0018] The process route adopted in the present invention: molten iron pretreatment—120t converter—LF ladle refining—VD vacuum treatment—soft blowing—wide and thick plate continuous casting—five-meter rolling. In order to ensure the success of the test, each process of the test furnace was strictly controlled, and the project team followed up every link of the test process. The content of [C] and [O] at the end of the converter is strict. Si-Mn deoxidation is used in the tapping process. Modifiers can be added appropriately according to the furnace conditions. Alloys other than FeAl are added according to normal operations. When the LF refining enters the station, the molten steel is oxygenated. When the oxygen content in the molten steel reaches a certain level, FeTi alloy is added to the molten steel for deoxidation to ensure the balance of titanium and oxygen in the steel. During the refining process, the molten steel is regularly fixed. Oxygen, alloying operation is carrie...

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Abstract

The invention discloses a deoxidation technique used in a low-alloy steel smelting process. By the adoption of the deoxidation technique used in the low-alloy steel smelting process, the strength, tenacity and welding performance of low-alloy steel are improved, so that industrial requirements are met. The deoxidation technique used in the low-alloy steel smelting process comprises the steps that molten iron is pretreated, a 120 t converter is adopted, a ladle furnace (LF) is used for ladle refining, vacuum degassing (VD) treatment is conducted, soft blowing is conducted, continuous casting of wide and thick plates is conducted, and five-meter rolling is conducted.

Description

technical field [0001] The invention relates to a deoxidation process in the smelting process of low-alloy steel, belonging to the technical field of alloy performance optimization. Background technique [0002] High-strength low-alloy steel is a widely used structural steel. In most cases, it is not only required to have high strength and toughness, but also to have excellent welding performance. For nearly half a century, the strength, toughness and welding performance of high-strength low-alloy steel have been greatly improved through the adoption of solid solution strengthening and precipitation strengthening of microalloys, clean steel smelting and controlled rolling and controlled cooling. In recent years, as pipelines, bridges, offshore oil production platforms, high-rise building steel structures, pressure vessels, etc. have increasingly adopted large-scale, high-strength steel plates, higher requirements have been put forward for the strength, toughness and welding ...

Claims

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Application Information

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IPC IPC(8): C21C7/06C21C7/10C22C33/04
Inventor 邬青
Owner 邬青
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