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Control method for plasticization of tire cord steel inclusion

A control method and inclusion technology, applied in the field of iron and steel smelting, can solve the problems of unfavorable economic benefits of cord steel, increased production cost per ton of steel, and high cost, and achieve the effects of good deformability, reduced oxygen activity, and reduced production cost

Active Publication Date: 2012-07-04
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, in order to avoid the adverse effect of the ladle lining material on the composition of inclusions in the steel, the production of cord steel generally uses a special ladle made of magnesium or zirconium, and the cost of the special ladle is relatively high, resulting in an increase in the production cost per ton of steel. It is not conducive to improving the economic benefits of cord steel

Method used

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  • Control method for plasticization of tire cord steel inclusion
  • Control method for plasticization of tire cord steel inclusion
  • Control method for plasticization of tire cord steel inclusion

Examples

Experimental program
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Effect test

Embodiment 1

[0019] 1. The end point of the converter adopts a high-drawing carbon process, and the mass fraction of carbon at the end point is 0.19%.

[0020] 2. The amount of Si-Fe alloy added in the converter tapping process is 2.56kg per ton of steel, and the amount of Mn-Fe alloy added is 5.10kg per ton of steel. Add low basicity pre-melted slag to the ladle and then enter the refining station, the slag binary basicity R(CaO / SiO 2 ) is 2.13.

[0021] 3. During the refining process of LF ladle furnace, the amount of ferrosilicon powder added is 1.40kg per ton of steel. After adding low basicity pre-melted slag, the binary basicity of the top slag is 1.08.

[0022] 4. After LF refining, feed magnesium wire to the ladle to further deoxidize the molten steel, and the feeding amount is 0.1kg per ton of steel.

[0023] 5. After feeding the magnesium wire, the argon blowing flow rate at the bottom of the ladle in the first stage is 160Nl / min, and the argon blowing time is 13.5min; the arg...

Embodiment 2

[0026] 1. The end point of the converter adopts high-drawing carbon technology, and the mass fraction of end point carbon is 0.20%.

[0027] 2. The amount of Si-Fe alloy added in the converter tapping process is 2.34kg per ton of steel, and the amount of Mn-Fe alloy added is 5.36kg per ton of steel. Add low basicity pre-melted slag to the ladle and then enter the refining station, the slag binary basicity R(CaO / SiO 2 ) is 2.38.

[0028] 3. During the refining process of LF ladle furnace, the amount of ferrosilicon powder added is 1.50kg per ton of steel. After adding low basicity pre-melted slag, the binary basicity of the top slag is 1.15.

[0029] 4. After LF refining, feed magnesium wire to the ladle to further deoxidize the molten steel, and the feeding amount is 0.4kg per ton of steel.

[0030] 5. After feeding the magnesium wire, the argon blowing flow rate at the bottom of the ladle in the first stage is 180Nl / min, and the argon blowing time is 13.2min; the argon blo...

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Abstract

The invention discloses a control method for plasticization of a tire cord steel inclusion, and belongs to the technical field of steel and iron smelting. The method comprises the following process steps of: performing a catch carbon process at an end point of a converter, wherein the mass fraction of end point carbon is 0.1-0.4 percent; performing deoxidization alloying on Si-Fe and Mn-Fe alloy during tapping of the converter, wherein 1.0-3.0 kg of Si-Fe alloy is added per ton of steel, and 3.0-6.0 kg of Mn-Fe alloy is added per ton of steel; adding ferrosilicon powder into the top of slag during LF ladle furnace refining, wherein the 0.5-1.5 kg of ferrosilicon powder is added per ton of steel; feeding 0.1-0.5 kg of magnesium wire per ton of steel into a ladle; and blowing argon to the ladle in two stages. The method has the advantages that: the special magnesium or zirconium ladle is not required any longer during production of tire cord steel; meanwhile, the inclusion control levelwhich meets the production requirement is achieved; and thus, the production cost per ton of steel is reduced, and the economic benefit is increased.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting. In particular, it relates to a method for controlling the plasticization of cord steel inclusions. Background technique [0002] Cord steel is known as "the ultimate in wire rods". It is mainly used to produce steel cords (also called tire radials) and to reinforce the skeleton of tires. It has the characteristics of high strength and good toughness. Because in the production process of steel cord, the wire rod is drawn into a monofilament of 0.15-0.35mm, and then twisted and plied to become the final product. This process requires that the broken wire rate does not exceed 1 time per 100km, so the production is difficult. There are extremely strict requirements on the uniformity, cleanliness and comprehensive quality of the raw material wire structure and composition, especially the stricter requirements on the size and shape of inclusions. The brittle inclusions in the steel ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 王立峰王勇张玮周建波朱殷翔吕迺冰
Owner SHOUGANG CORPORATION
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