A kind of hot-rolled wire rod for ultra-low carbon steel fiber and its production method

A hot-rolled wire rod and ultra-low carbon steel technology, applied in the field of metallurgy, can solve problems such as mechanical properties, drawing ability and specification restrictions, and achieve the effects of achieving strength and good plasticity, increasing selectivity, and reducing procurement costs

Active Publication Date: 2018-11-20
XINGTAI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the processing process includes pickling, drawing, heat treatment, shearing and other processes of the original wire rod, different grades of finished products have certain restrictions on the mechanical properties, drawing ability and specifications of the original wire rod

Method used

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  • A kind of hot-rolled wire rod for ultra-low carbon steel fiber and its production method
  • A kind of hot-rolled wire rod for ultra-low carbon steel fiber and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this example, the hot-rolled wire rod for ultra-low carbon steel fibers has the following chemical composition and mass percentage: C: 0.002%, Si: 0.01%, Mn: 0.05%, P: 0.005%, S: 0.010%, Alt : 0.03%, Ti: 0.10%, the rest is iron and unavoidable impurities; the specification is Φ7.0mm.

[0026] The production method of the hot-rolled wire rod for ultra-low carbon steel fibers in this embodiment includes continuous casting, blanking and heating, rolling, spinning, and cooling processes. The specific process steps are as follows:

[0027] (1) Continuous casting process: After molten iron desulfurization treatment, top-bottom combined blowing converter smelting, LF furnace refining and RH vacuum refining, molten steel is continuously cast into billets. The chemical composition and mass percentage of billets are: C: 0.002%, Si: 0.01%, Mn: 0.05%, P: 0.005%, S: 0.010%, Alt: 0.03%, Ti: 0.10%, and the rest are iron and unavoidable impurities;

[0028] (2) Blooming and heating...

Embodiment 2

[0034] The hot-rolled wire rod for ultra-low carbon steel fibers in this example has the following chemical composition and mass percentage: C: 0.010%, Si: 0.03%, Mn: 0.20%, P: 0.020%, S: 0.020%, Alt : 0.02%, Ti: 0.12%, the rest is iron and unavoidable impurities; the specification is Φ7.0mm.

[0035] The production method of the hot-rolled wire rod for ultra-low carbon steel fibers in this embodiment includes continuous casting, blanking and heating, rolling, spinning, and cooling processes. The specific process steps are as follows:

[0036] (1) Continuous casting process: After molten iron desulfurization treatment, top-bottom combined blowing converter smelting, LF furnace refining and RH vacuum refining, molten steel is continuously cast into billets. The chemical composition and mass percentage of billets are: C: 0.010%, Si: 0.03%, Mn: 0.20%, P: 0.020%, S: 0.020%, Alt: 0.02%, Ti: 0.12%, and the rest are iron and unavoidable impurities;

[0037](2) Billet opening and hea...

Embodiment 3

[0043] The hot-rolled wire rod for ultra-low carbon steel fibers in this example has the following chemical composition and mass percentage: C: 0.008%, Si: 0.02%, Mn: 0.15%, P: 0.015%, S: 0.015%, Alt : 0.04%, Ti: 0.05%, the rest is iron and unavoidable impurities; the specification is Φ7.0mm.

[0044] The production method of the hot-rolled wire rod for ultra-low carbon steel fibers in this embodiment includes continuous casting, blanking and heating, rolling, spinning, and cooling processes. The specific process steps are as follows:

[0045] (1) Continuous casting process: After molten iron desulfurization treatment, top-bottom combined blowing converter smelting, LF furnace refining and RH vacuum refining, molten steel is continuously cast into billets. The chemical composition and mass percentage of billets are: C: 0.008%, Si: 0.02%, Mn: 0.15%, P: 0.015%, S: 0.015%, Alt: 0.04%, Ti: 0.05%, and the rest are iron and unavoidable impurities;

[0046] (2) Blooming and heating ...

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Abstract

The invention relates to a hot rolled wire rod for ultra-low carbon steel fibers and a production method of the hot rolled wire rod. The wire rod comprises the chemical components of, by mass, less than or equal to 0.010% of C, less than or equal to 0.03% of Si, less than or equal to 0.20% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, greater than or equal to 0.02% of Alt, 0.05-0.12% of Ti and the balance iron and inevitable impurities. The production method comprises the procedures of continuous casting, cogging, heating, rolling, spinning and cooling. By adding the Ti elements to ultra-low carbon steel, through low-temperature rolling, uniform ferrite and pearlite structures are generated, effective combination of strength and plasticity is achieved, thus, the tensile strength of the wire rod with the specification being phi 7.0 mm is 310-360 MPa, the percentage elongation after fracture is greater than or equal to 50.0%, 1300-MPa-class steel fibers are allowed to be produced through the wire rod with the large specification under the condition that existing equipment of downstream customers is not changed, the purchase cost is lowered, and the downstream customer selectivity is increased.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a hot-rolled wire rod for ultra-low carbon steel fibers and a production method thereof. Background technique [0002] Steel fibers are thin steel wires within a certain range of lengths and diameters that are added to add mortar or concrete. The tensile strength of cold-drawn non-stainless steel fiber wire is 380-2500MPa, which is distinguished according to the grade of the finished product. Because the processing process includes pickling, drawing, heat treatment, shearing and other processes of the original wire rod, different grades of finished products have certain restrictions on the mechanical properties, drawing ability and specifications of the original wire rod. [0003] Patent 201510586628.2 discloses a "1300MPa high-strength steel fiber steel production method", the chemical composition of the low-carbon steel: C: 0.02-0.03%, Si≤0.03%, Mn: 0.35-0.45%, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/14C22C38/02C22C38/04C22C38/06C21D8/06
CPCC21D8/065C21D2211/005C21D2211/009C22C38/004C22C38/02C22C38/04C22C38/06C22C38/14
Inventor 李宝秀田新中张治广崔娟郭明仪戴永刚韩广杰翟进坡李世琳王成杰李永超卢立新
Owner XINGTAI IRON & STEEL
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