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Ultra-high-strength cable steel and its production method

A cable steel, ultra-high-strength technology, applied in the field of electrical cable steel, can solve the problems of low tensile strength, can not meet the requirements of ultra-high-strength cable steel, low carbon and manganese content, etc., to achieve high strength, good cold drawing Performance, Effect of High Conductivity

Active Publication Date: 2016-08-24
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of carbon and manganese elements in this steel is relatively low, resulting in low steel tensile strength ≤ 300MPa, which cannot meet the requirements of ultra-high-strength cable steel

Method used

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  • Ultra-high-strength cable steel and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An ultra-high-strength cable steel, its chemical composition by weight percentage is: C: 0.05%, Si: 0.09%, Mn: 0.15%, P: 0.020%, S: 0.010%, Als: 0.03%, the balance is Fe and inevitable impurities. Product diameter 8.5mm.

[0021] The production method of the ultra-high strength cable steel is carried out according to the usual pure steel process, and includes the following steps: molten iron desulfurization, converter smelting, argon blowing, RH furnace treatment, continuous casting, billet heating, high-speed wire rolling, Steyr Mo control cold, where:

[0022] When the molten iron is desulfurized, the weight percentage of each element in the incoming molten iron is controlled as follows: S≤0.025%, Mn≤0.30%, Cu≤0.060%, Si≤0.80%, the incoming molten iron temperature is ≥1250°C, and the molten iron enters the furnace. The weight percentage of S is less than or equal to 0.001%, and the molten iron is clean; self-retained scrap or low-sulfur scrap is used, and scrap cont...

Embodiment 2

[0031] A kind of ultra-high-strength cable steel, according to the steel composition requirements, the chemical composition of the molten steel is: C: 0.01%, Si: 0.05%, Mn: 0.09%, P: 0.018%, S: 0.008%, Als: 0.01%, and the rest The amount is Fe and inevitable impurities. Product diameter 7.5mm.

[0032] The production method of this ultra-high-strength cable steel, the basic steps are operated according to the method of embodiment 1, and the difference is:

[0033] During converter smelting, the target temperature for tapping is 1670°C, and the tapping is not pre-deoxidized. When blowing argon, 0.7kg / ton of Al shot and 0.2kg / ton of calcium carbide are sprayed on the slag surface before RH is applied to the ladle. The amount (TFe) is reduced to below 10%, and the argon station is blown softly for 3 minutes;

[0034] During the RH furnace treatment, the RH furnace treatment time is 30min, and the de-C, final deoxidation and composition fine-tuning are carried out in the RH furn...

Embodiment 3

[0038]A kind of ultra-high-strength cable steel, according to the steel composition requirements, the chemical composition of the molten steel is: C: 0.02%, Si: 0.01%, Mn: 0.20%, P: 0.015%, S: 0.010%, Als: 0.008%, and the rest The amount is Fe and inevitable impurities.

[0039] The production method of this ultra-high-strength cable steel, the basic steps are the same as in Example 1, and the difference is:

[0040] During converter smelting, the target temperature for tapping is 1650 °C; the tapping is not pre-deoxidized. When blowing argon, 0.3 kg / ton of Al shot and 0.2 kg / ton of calcium carbide are sprayed on the slag surface before RH is applied to the ladle, and the total amount of iron oxide in the slag is removed (TFe) was reduced to below 10%, and the argon station was blown softly for 2 minutes. In the case of RH furnace treatment, the RH furnace treatment time is 200min, and the de-C, final deoxidization and composition fine-tuning are carried out in the RH furnace...

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Abstract

The invention discloses super high strength cable steel and a production method thereof. The steel comprises the following chemical components in weight percent: C: 0.01-0.08, Si: 0.001-0.09, Mn: 0.05-0.20, P: less than or equal to 0.015, S: less than or equal to 0.010, Als: 0.005-0.03 and the balance of Fe and inevitable impurities. The production method of the super high strength cable steel is conducted in accordance with the normal pure steel technology and comprises the following steps: hot metal desulfurization, furnace revolving smelting, argon blowing, RH furnace treatment, continuous casting, square blank heating, high thread rolling and Stelmor cooling control. The practice has proven that the tensile strength of the steel is high, the electrical conductivity can reach more than 15%, the steel has favorable cold-drawing property; moreover, the operation of the preparation method is simple and the energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of steel for electrical cables, in particular to an ultra-high-strength cable steel and a production method thereof. Background technique [0002] Ultra-high-strength cable steel is mainly used for large spans or occasions where auxiliary reinforcing wires cannot be used. The user's requirements for ultra-high-strength cable steel are: after cold working, its tensile strength should be greater than 950Mpa after tempering, and its electrical conductivity should also be 14.5. % or more, the drawing performance is also good. These requirements have a certain influence on each other. For example, conductivity and strength will influence each other. When the strength is high, the conductivity is low, and when the conductivity is high, the strength is low, so the development of this steel is more difficult. [0003] Before this application, the invention patent with the application number of 201310401021.X disclo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06H01B1/02
CPCC22C38/02C22C38/04C22C38/06H01B1/02
Inventor 帅习元仇东丽鲁修宇周勇黄静夏艳花刘婳吴超任安超黄成红邱俊贾万军
Owner 武汉钢铁有限公司
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