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Tire cord steel inclusion plasticization control method and tire cord steel

A control method and inclusion technology, which are applied in the field of cord steel and cord steel inclusion plasticization control, can solve the problems of poor deformation ability of inclusions, narrow industrial production control window, and difficult control.

Pending Publication Date: 2022-07-29
INST OF RES OF IRON & STEEL JIANGSU PROVINCE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor deformability of inclusions in the prior art, narrow industrial production control window, and high control difficulty, thereby providing a method for controlling the plasticization of cord steel inclusions and cord steel steel

Method used

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  • Tire cord steel inclusion plasticization control method and tire cord steel
  • Tire cord steel inclusion plasticization control method and tire cord steel
  • Tire cord steel inclusion plasticization control method and tire cord steel

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Effect test

Embodiment 1-6

[0055] A method for controlling the plasticization of inclusions in cord steel, comprising the following steps:

[0056] Step 1. KR molten iron pretreatment: molten iron is transported to KR for desulfurization treatment, and the parameters of molten iron after desulfurization are shown in Table 1 (ie, the parameters of molten iron entering the converter).

[0057] Step 2. Smelting:

[0058] The 135t converter is used for smelting, and the conditions of molten iron, scrap steel and end point control in the converter are shown in Table 1 and Table 2.

[0059] Table 1 The molten iron conditions and scrap ratio of the converter into the furnace

[0060]

[0061]

[0062] Table 2 Control situation of converter tapping end point

[0063] Example End point temperature, °C End point carbon, % End point oxygen, % End point P, % End point S, % 1 1665 0.068 0.042 0.014 0.0085 2 1650 0.083 0.035 0.012 0.0100 3 1698 0.073 0.049 0.011 0...

Embodiment 7-12

[0083] A method for controlling the plasticization of inclusions in cord steel, comprising the following steps:

[0084] Step 1. KR molten iron pretreatment: molten iron is transported to KR for desulfurization treatment, and the parameters of molten iron after desulfurization are shown in Table 1 (ie, the parameters of molten iron entering the converter).

[0085] Step 2. Smelting:

[0086]The 100t electric furnace is used for smelting, and the conditions of molten iron, scrap steel and end point control in the electric furnace are shown in Tables 8 and 9.

[0087] Table 8 The molten iron conditions and scrap ratio of the electric furnace into the furnace

[0088] Example temperature, °C C，％ Si, % S，％ Scrap ratio, % 7 1390 4.50 0.25 0.0025 6 8 1410 4.46 0.60 0.0026 5 9 1380 4.61 0.37 0.0015 10 10 1405 4.30 0.55 0.0037 8 11 1396 4.65 0.39 0.0017 9 12 1385 4.56 0.45 0.0021 7

[0089] Table 9 Control si...

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Abstract

The invention discloses a tire cord steel inclusion plasticization control method and tire cord steel, belongs to the technical field of steelmaking, and overcomes the defects of poor inclusion deformation capacity, narrow industrial production control window, high control difficulty and the like in the prior art. The tire cord steel inclusion plasticization control method comprises the following steps: step 1, KR molten iron pretreatment; step 2, smelting; 3, tapping control is conducted, specifically, when 60%-80% of tapping is conducted, a modifier is added, the modifier comprises an alkali metal compound, and the adding amount of the modifier is 1.0-2.5 kg / t; the bottom blowing flow in the tapping process is 1000-1500 NL / min; after tapping is finished, stirring is conducted for 3-5 min at the bottom blowing flow of 600-1000 NL / min; 4, LF refining is conducted, the bottom blowing flow is 100 NL / min to 200 NL / min, after slagging is completed, soft stirring treatment is conducted, and the bottom blowing flow of soft stirring is 30 NL / min to 80 NL / min; and 5, continuous casting.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a method for controlling the plasticization of inclusions in cord steel and a cord steel. Background technique [0002] Cord steel is widely used in the manufacturing industry and is an indispensable product for various automobile, truck, aircraft radial tires and other rubber skeleton materials. With the development of society, especially the automobile industry requires lightweight, the cord steel wire is required to be thinner and stronger, and the tire has extremely high requirements for stability, life, and safety. Therefore, higher requirements are also placed on the quality of the cord steel. As we all know, inclusions have always been one of the key indicators affecting the quality of cord steel, especially non-deformable inclusions with poor plasticity, which have the greatest impact on the drawing performance and service stability of cord steel. [000...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/04C22C38/60C21C7/00C21C7/076C21C7/10
CPCC22C33/04C22C38/04C22C38/60C21C7/0006C21C7/076C21C7/10Y02P10/20
Inventor 麻晗赵家七马建超韩丽君
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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