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A method for adding titanium element in the smelting process of high-titanium microalloyed steel

A micro-alloyed steel and smelting process technology, applied in the field of steel smelting, can solve problems such as no effective practical measures, and achieve the effects of improving the comprehensive yield, improving stability and improving yield.

Active Publication Date: 2017-02-01
LAIWU STEEL YINSHAN SECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Through the search of prior art patents and literature, no relevant effective practical measures for the above problems have been found

Method used

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  • A method for adding titanium element in the smelting process of high-titanium microalloyed steel
  • A method for adding titanium element in the smelting process of high-titanium microalloyed steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Process flow: 120 tons of converter smelting - LF refining - 1500mm hot rolling machine - coiling - finished product (thickness 4mm).

[0020] Table 1 embodiment 1 produces the chemical composition of high-titanium microalloyed steel

[0021]

[0022] Based on the titanium content of 0.10% in the high-titanium microalloy steel described in Table 1, the calculated amount of added titanium element is about 130Kg, and 117Kg of the required element is added in the form of ferrotitanium during the tapping process of the converter, accounting for 90% of the total added amount , and then carry out LF refining; after 15 minutes of deoxidation and slagging in the LF refining furnace, the remaining titanium element amount (310-350 meters) is added by feeding titanium wire to fine-tune the titanium element content. After the above operations, the titanium yield of the obtained high-titanium micro-alloyed steel was 71%.

[0023] Using the above-mentioned titanium addition metho...

Embodiment 2

[0025] Process flow: 120 tons of converter smelting - LF refining - 1500mm hot rolling machine - coiling - finished product (thickness 6mm).

[0026] Table 2 embodiment 2 produces the chemical composition of high titanium microalloy steel

[0027]

[0028] Based on the titanium content of 0.17% in the high-titanium microalloy steel described in Table 2, after calculating the addition amount of titanium element to be 221Kg, the required element amount added in the form of ferrotitanium in the converter tapping process is 209.95Kg, accounting for the total addition amount After 16 minutes of deoxidation and slagging in the LF refining furnace, the remaining titanium element amount (160-200 meters) is added by feeding titanium wire to fine-tune the titanium element content. After the above operations, the titanium yield of the obtained high-titanium microalloy steel was 78%.

[0029] Using the above-mentioned titanium addition method and addition amount, the whole coil of str...

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Abstract

The invention discloses an addition method of Ti element in a smelting process of high-Ti microalloyed steel. The addition method comprises the following steps: 1, according to the content of Ti element by mass percent in the high-Ti microalloyed steel, calculating the required addition of Ti element; 2, adding 90-95% of the required addition of Ti element in a form of ferrotitanium in a converter tapping process and carrying out LF refining after converter tapping; 3, after deoxygenation and slagging in an LF refining furnace, adding the rest 5-10% of Ti element in a Ti wire feeding manner and finely regulating the content of Ti element. The addition method can improve the yield of Ti element and the yield of Ti element has a relatively good stability; the quality and stability of the steel can be improved and the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of steel smelting. Specifically, the invention relates to a method for adding titanium element in the smelting process of high-titanium microalloy steel. Background technique [0002] With the rapid development of construction machinery, automobile manufacturing and other industries, the demand for steel materials is gradually increasing. Therefore, high-strength steel with a yield strength of 600MPa to 1000MPa has been widely used in high-end equipment such as automobile beam manufacturing, bulldozers, cranes, and concrete pump arms. The alloy composition system adopted at home and abroad is gradually transformed from a micro-titanium treatment of less than 0.02% to a composition system with a titanium content of more than 0.1% or even higher, relying on the precipitation strengthening effect of a large amount of TiC to improve the strength level of the material. Since titanium may form TiO, TiS, Ti 2 CS ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C21C7/00
Inventor 赵培林王文生孙其家武玉利刘圣王金洪张利平杜传治路峰郝帅王孝科王奉县
Owner LAIWU STEEL YINSHAN SECTION CO LTD