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Hot-rolled wire rod for 70-kilogram-level welding wire and production method thereof

A technology of hot-rolled wire rod and production method is applied in the field of metallurgy to achieve the effects of saving production cost, improving toughness and plasticity, and high and low temperature impact toughness performance.

Active Publication Date: 2020-04-10
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the need for annealing treatment in the production process of the existing hot-rolled wire rod for 70 kg high-strength welding wire, and the problems that the low-temperature impact energy, area shrinkage and elongation after fracture of the existing hot-rolled wire rod for welding wire need to be further improved, this paper The invention provides a hot-rolled wire rod for 70 kg welding wire and its production method

Method used

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  • Hot-rolled wire rod for 70-kilogram-level welding wire and production method thereof
  • Hot-rolled wire rod for 70-kilogram-level welding wire and production method thereof
  • Hot-rolled wire rod for 70-kilogram-level welding wire and production method thereof

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Embodiment 1

[0038] The embodiment of the present invention provides a kind of hot-rolled wire rod for 70 kilograms welding wire, and its chemical composition is:

[0039] C: 0.06%, Si: 0.60%, Mn: 1.40%, Ni: 0.50%, Mo: 0.30%, Cr: 0.05%, V: 0.05%, Ti: 0.1%, Al: 0.015%, Zr: 0.05%, P: 0.01%, S: 0.002%, As: 0.0011%, Sb: 0.003%, B: 0.005%, Se: 0.002%, Ca: 0.01%, Pb: 0.002%, Bi: 0.003%, Te: 0.005%, O: 0.005%, H: 0.0001%, and the balance is Fe.

[0040] The production method of the hot-rolled wire rod for above-mentioned 70 kg grade welding wire is as follows:

[0041] Step 1. Using steel scrap as raw material, after electric arc furnace smelting, LF refining, and continuous casting, a continuous casting billet with a specification of 165×165mm is obtained; wherein, in the continuous casting process, electromagnetic stirring of the crystallizer and electromagnetic stirring of the solidification end are used , where the electromagnetic stirring at the solidification end is equipped with two elec...

Embodiment 2

[0046] The embodiment of the present invention provides a kind of hot-rolled wire rod for 70 kilograms welding wire, and its chemical composition is:

[0047] C: 0.010%, Si: 0.35%, Mn: 1.47%, Ni: 0.70%, Mo: 0.15%, Cr: 0.20%, V: 0.01%, Ti: 0.05%, Al: 0.025%, Zr: 0.03%, P: 0.007%, S: 0.01%, As: 0.01%, Sb: 0.0032%, B: 0.002%, Se: 0.001%, Ca: 0.001%, Pb: 0.002%, Bi: 0.001%, Te: 0.003%, O: 0.0041%, H: 0.000045%, balance Fe.

[0048] The production method of the hot-rolled wire rod for above-mentioned 70 kg grade welding wire is as follows:

[0049] Step 1. Using steel scrap as raw material, after electric arc furnace smelting, LF refining, and continuous casting, a continuous casting billet with a specification of 165×165mm is obtained; wherein, in the continuous casting process, electromagnetic stirring of the crystallizer and electromagnetic stirring of the solidification end are used , where the electromagnetic stirring at the solidification end is equipped with two electromag...

Embodiment 3

[0054] The embodiment of the present invention provides a kind of hot-rolled wire rod for 70 kilograms welding wire, and its chemical composition is:

[0055] C: 0.072%, Si: 0.46%, Mn: 1.60%, Ni: 0.67%, Mo: 0.17%, Cr: 0.07%, V: 0.012%, Ti: 0.05%, Al: 0.015%, Zr: 0.032%, P: 0.009%, S: 0.0031%, As: 0.0021%, Sb: 0.01%, B: 0.003%, Se: 0.01%, Ca: 0.0013%, Pb: 0.01%, Bi: 0.001%, Te: 0.002%, O: 0.0025%, H: 0.00006%; the balance is Fe.

[0056] The production method of the hot-rolled wire rod for above-mentioned 70 kg grade welding wire is as follows:

[0057] Step 1. Using steel scrap as raw material, after electric arc furnace smelting, LF refining, and continuous casting, a continuous casting billet with a specification of 155×155 mm is obtained; wherein, in the continuous casting process, electromagnetic stirring of the crystallizer and electromagnetic stirring of the solidification end are used , where the electromagnetic stirring at the solidification end is equipped with two ...

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Abstract

The invention relates to the technical field of metallurgy, and particularly discloses a hot-rolled wire rod for a 70-kilogram-level welding wire and a production method thereof. The hot-rolled wire rod comprises the following components: C, Si, Mn, Ni, Mo, Cr, V, Ti, Al, Zr and the balance of Fe and inevitable impurities, and the hot-rolled wire rod for the 70kg-grade welding wire is prepared through the procedures of steelmaking, continuous casting, heating, rolling, spinning and cooling. Component adjustment and process optimization are carried out, the prepared hot-rolled wire rod meets the requirements of a wire rod for a 70-kilogram-level welding wire, and a ferrite and pearlitic structure suitable for drawing is obtained; the strength, the toughness and the plasticity of the wire rod are good; and therefore the annealing procedure can be omitted in the welding wire machining process, deposited metal obtained after welding is moderate in strength, good in low-temperature impact energy and high in production efficiency, and the wide application prospect is achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a hot-rolled wire rod for 70-kilogram welding wire and a production method thereof. Background technique [0002] With the rapid development of lightweight mechanical equipment and high-strength steel, the demand for high-strength welding wire steel is also increasing. High-strength welding wire is a kind of low-carbon alloy steel wire, which is made of hot-rolled wire rod through multi-pass cold working and drawing. Due to the large amount of deformation in the cold drawing process, it is required that the hot-rolled wire rod for welding wire must have good mechanical properties. To meet the requirements for the drawing process, mechanical properties and welding quality of the welding wire. [0003] Generally, the higher the strength level of the welding wire, the more alloying elements it contains in the matrix, especially the more precious metal elements and supercooled au...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/50C22C38/58C22C38/60C21D8/06
CPCC21D8/065C21D2211/005C21D2211/009C22C38/002C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/50C22C38/58C22C38/60
Inventor 张贺佳杨斌孔超王全利杜立华贾元海
Owner HEBEI IRON AND STEEL
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