Semi-hard type cable steel and production method thereof

A production method and cable steel technology, applied in the field of steel for cables, can solve problems such as ineffective decarburization, and achieve the effects of meeting production requirements, solving easy hardening, and avoiding pollution

Inactive Publication Date: 2017-10-10
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the existing semi-hard cable steel production method

Method used

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  • Semi-hard type cable steel and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The mass percentage of the chemical composition of a semi-rigid cable steel is: C: 0.001%, Si: 0.02%, Mn: 0.10%, P: 0.020%, S: 0.010%, Als: 0.01%, the rest is Fe and not Avoid impurities, and the above elements satisfy Cu+Ni+Cr+Mo≤0.030%. Its production method comprises the following steps:

[0030] 1) Hot metal desulfurization: the mass percentage of each element in the incoming hot metal is: S ≤ 0.025%, Mn ≤ 0.30%, Cu ≤ 0.060%, Si ≤ 0.80%, and the mass percentage of sulfur in the molten iron is controlled to be S ≤ 0.001%;

[0031] 2) Converter smelting: the end-point carbon control target is 0.06%, the mass percentage of oxygen is controlled at 0.040-0.070%, the slag is blocked and the steel is tapped, the thickness of the slag layer is ≤50mm, the final slag basicity is 3.0-4.0, and the tapping temperature is controlled at 1680- 1700°C;

[0032] 3) Argon blowing: Sprinkle 0.1-0.5kg / ton of Al pellets on the slag surface, 0.1-0.3kg / ton of calcium carbide / steel, reduc...

Embodiment 2

[0041]The mass percentage of the chemical composition of a semi-rigid cable steel is: C: 0.003%, Si: 0.015%, Mn: 0.08%, P: 0.015%, S: 0.007%, Als: 0.009%, the rest is Fe and not Avoid impurities, and the above elements satisfy Cu+Ni+Cr+Mo≤0.030%. Its production method comprises the following steps:

[0042] 1) Hot metal desulfurization: the mass percentage of each element in the incoming hot metal is: S ≤ 0.025%, Mn ≤ 0.30%, Cu ≤ 0.060%, Si ≤ 0.80%, and the mass percentage of sulfur in the molten iron is controlled to be S ≤ 0.001%;

[0043] 2) Converter smelting: the end-point carbon control target is 0.06%, the mass percentage of oxygen is controlled at 0.040-0.070%, the slag is blocked and the steel is tapped, the thickness of the slag layer is ≤50mm, the final slag basicity is 3.0-4.0, and the tapping temperature is controlled at 1680- 1700°C;

[0044] 3) Argon blowing: Sprinkle 0.1-0.5kg / ton of Al pellets on the slag surface, 0.1-0.3kg / ton of calcium carbide / steel, redu...

Embodiment 3

[0053] The mass percentage of the chemical composition of a semi-rigid cable steel is: C: 0.005%, Si: 0.01%, Mn: 0.07%, P: 0.013%, S: 0.006%, Als: 0.008%, the rest is Fe and not Avoid impurities, and the above elements satisfy Cu+Ni+Cr+Mo≤0.030%. Its production method comprises the following steps:

[0054] 1) Hot metal desulfurization: the mass percentage of each element in the incoming hot metal is: S ≤ 0.025%, Mn ≤ 0.30%, Cu ≤ 0.060%, Si ≤ 0.80%, and the mass percentage of sulfur in the molten iron is controlled to be S ≤ 0.001%;

[0055] 2) Converter smelting: the end-point carbon control target is 0.06%, the mass percentage of oxygen is controlled at 0.040-0.070%, the slag is blocked and the steel is tapped, the thickness of the slag layer is ≤50mm, the final slag basicity is 3.0-4.0, and the tapping temperature is controlled at 1680- 1700°C;

[0056] 3) Argon blowing: Sprinkle 0.1-0.5kg / ton of Al pellets on the slag surface, 0.1-0.3kg / ton of calcium carbide / steel, redu...

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Abstract

The invention belongs to the technical field of steel for cables and particularly provides semi-hard type cable steel and a production method thereof. The semi-hard type cable steel is prepared from the following chemical components in percentage by mass: smaller than or equal to 0.02 percent of C, smaller than or equal to 0.02 percent of Si, 0.05-0.1 percent of Mn, smaller than or equal to 0.020 percent of P, smaller than or equal to 0.015 percent of S, 0.005-0.01 percent of Als and the balance of Fe and inevitable impurities, wherein the elements satisfy the relationship that Cu+Ni+Cr+Mo is smaller than or equal to 0.030 percent, and Mn/S is larger than or equal to 10. The production method of the semi-hard type cable steel comprises the following steps: molten iron desulphurization, converter smelting, argon blowing, RH furnace treatment, continuous casting, billet heating, high-speed wire rolling and Stelmor controlled cooling. A product prepared by the steel has the tensile strength reaching 560-750Mpa, the electrical conductivity being 16.2 percent or above and good drawing property; and by adopting the production method, through mechanical descaling, pollution of pickling to environment is avoided, operation is simple, and the production requirements are met.

Description

technical field [0001] The invention belongs to the technical field of cable steel, and specifically provides a semi-hard cable steel and a production method. Background technique [0002] Semi-rigid cable steel is mainly used in mine blasting wires or occasions where auxiliary reinforcement wires cannot be used. The user's requirements for semi-hard cable steel are: after cold processing, the tensile strength is 550-750Mpa after tempering, and its electrical conductivity The rate is also high, above 16.2%, and the drawing performance is also good. These requirements have a certain influence on each other. For example, the conductivity and strength will affect each other. When the strength is high, the conductivity is low, and when the conductivity is high, the strength is low. Therefore, the development of this steel is more difficult. [0003] In the past, producers of semi-rigid cable steel used SWRM6 wire rod instead as the raw material for producing semi-rigid cable st...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/06C22C38/02C22C33/04C21C7/06C21C7/10C21C7/064C21C7/068C21D8/06
CPCC22C38/04C21C7/0006C21C7/06C21C7/064C21C7/068C21C7/10C21D8/065C22C33/04C22C38/02C22C38/06
Inventor 帅习元仇东丽鲁修宇周勇黄静张帆黄成红贾万军
Owner 武汉钢铁有限公司
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