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Preparation method for H08MnA no-twist controlled-cooling hot-rolled wire rod for submerged-arc welding wire

A submerged arc welding wire, hot and cold technology, used in welding equipment, welding media, manufacturing tools, etc., can solve problems such as affecting mechanical properties

Inactive Publication Date: 2016-05-11
BENGANG STEEL PLATES
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  • Application Information

AI Technical Summary

Problems solved by technology

Undesirable structures such as martensite and granular bainite sometimes appear in the wire rod, which affects the mechanical properties

Method used

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  • Preparation method for H08MnA no-twist controlled-cooling hot-rolled wire rod for submerged-arc welding wire
  • Preparation method for H08MnA no-twist controlled-cooling hot-rolled wire rod for submerged-arc welding wire
  • Preparation method for H08MnA no-twist controlled-cooling hot-rolled wire rod for submerged-arc welding wire

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Embodiment Construction

[0011] A method for preparing H08MnA twist-free cold-rolled wire rod for submerged arc welding wire. ≤0.009%, S≤0.009%, and the rest is Fe; the wire rod is rolled by a twist-free high-speed wire rod rolling mill, and cooled by a delayed stelmore process after rolling. The chemical composition of the specific example is shown in Table 1, the mechanical performance index is shown in Table 2, and the metallographic structure analysis is shown in Table 3.

[0012] Table I

[0013]

[0014]

[0015] Table II

[0016]

[0017] Table three

[0018]

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PUM

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Abstract

The invention relates to a preparation method for a wire rod for a welding wire, in particular to a preparation method for an H08MnA no-twist controlled-cooling hot-rolled wire rod for a submerged-arc welding wire. According to the technical scheme adopted by the invention, the preparation method for the H08MnA no-twist controlled-cooling hot-rolled wire rod for the submerged-arc welding wire is characterized in that the wire rod consists of the following chemical components in proportion: 0.045-0.095% of C, 0.88-1.02% of Mn, 0.035-0.065% of Si, less than or equal to 0.009% of P, less than or equal to 0.009% of S and the balance of Fe; the wire rod is rolled through a no-twist high-speed wire rolling mill, and then is cooled by a delay type Stelmor process after being rolled. According to the preparation method for the H08MnA no-twist controlled-cooling hot-rolled wire rod for the submerged-arc welding wire provided by the invention, product metallurgical quality, chemical components and drawing properties are guaranteed to meet usage needs.

Description

technical field [0001] The invention relates to a method for preparing a wire rod for welding wire, in particular to a method for preparing a H08MnA twist-free cold and hot-rolled wire rod for submerged arc welding wire. Background technique [0002] The biggest feature of the wire rod for welding is that it must not only ensure the drawing performance, but also ensure the quality and mechanical properties of the weld, and not produce air bubbles, so there are strict requirements on the chemical composition of the steel. [0003] H08MnA belongs to low-silicon and low-carbon steel. According to the national standard GB / T3429-2002, its chemical composition includes Si≤0.030%, P≤0.015%, and S≤0.015%. The wire rod made according to this standard is easy to oxidize and generate gas to escape during welding, so that many pores and porosity are produced in the weld, and the sensitivity of weld cracking increases. Undesirable structures such as martensite and granular bainite somet...

Claims

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Application Information

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IPC IPC(8): B23K35/40B23K35/30
CPCB23K35/40B23K35/3073
Inventor 孙忠斌申强
Owner BENGANG STEEL PLATES
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