Self-protecting wearable flux-cored wire of hot-rolling blooming roll

A technology of flux-cored welding wire and self-protection, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., to achieve the effect of improving the service life

Inactive Publication Date: 2014-03-26
天津雷公焊接材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing hot-rolled blanking roller repair surfacing welding wires on the market are all submerged arc welding wires, which need to be used with flux

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A hot-rolled blanking roll self-protecting wear-resistant flux-cored wire, based on the mass fraction of the flux-cored wire, the content of each component in the wire is as follows: C: 0.25%; Si: 1.2%; Mn: 1.6%; Cr: 6.5% %; Mo: 1.5%; V: 0.5%; W: 1.5%; CaF 2 : 5.5%; TiO 2 : 4.5%; CaCO 3 : 0.5%; SiO 2 : 0.5%; the rest is iron.

[0016] Wire diameter: 2.4mm, current: 320A, voltage 28V, base metal 9Cr2Mo, preheated at 350°C before welding, welding thickness 10mm, welding speed 600mm / min, slow cooling after welding, and tempering at 560°C, surfacing alloy The hardness is HRC56.

Embodiment 2

[0018] A hot-rolled blanking roll self-protecting wear-resistant flux-cored wire, based on the mass fraction of the flux-cored wire, the content of each component in the wire is as follows: C: 0.2%; Si: 1.3%; Mn: 1.8%; Cr: 6 %; Mo: 1.4%; V: 1%; W: 2%; CaF 2 : 5%; TiO 2 : 4%; CaCO 3 : 0.5%; SiO 2 : 0.5%; the rest is iron.

[0019] Wire diameter: 2.8mm, current: 380A, voltage 32V, base metal 9Cr2Mo, preheated at 350°C before welding, welding thickness 10mm, welding speed 600mm / min, slow cooling after welding, and tempering at 560°C, surfacing alloy The hardness is HRC58.

Embodiment 3

[0021] A hot-rolled blanking roll self-protecting wear-resistant flux-cored wire, based on the mass fraction of the flux-cored wire, the content of each component in the wire is as follows: C: 0.3%; Si: 1.1%; Mn: 1.5%; Cr: 7 %; Mo: 1.6%; V: 0.4%; W: 1.2%; CaF 2 : 6%; TiO 2 : 5%; CaCO 3 : 0.45%; SiO 2 : 0.6%; the rest is iron.

[0022] Wire diameter: 3.2mm, current: 420A, voltage 32V, base metal 9Cr2Mo, preheated at 350°C before welding, welding thickness 10mm, welding speed 600mm / min, slow cooling after welding, and tempering at 560°C, surfacing alloy The hardness is HRC55.

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PUM

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Abstract

The invention relates to a self-protecting wearable flux-cored wire of a hot-rolling blooming roll. The flux-cored wire consists of a low-carbon steel outer skin and a flux core, and is characterized by comprising the following components in percentage by total mass of the flux-cored wire: 0.2 to 0.3 percent of C, 1.1 to 1.3 percent of Si, 1.5 to 1.8 percent of Mn, 6 to 7 percent of Cr, 1.4 to 1.6 percent of Mo, 0.5 to 1 percent of V, 1.2 to 2 percent of W, 5 to 6 percent of CaF, 2, 4 to 5 percent of TiO2, 0.45 to 0.6 percent of CaCO3, 0.4 to 0.6 percent of SiO2 and the balance of iron. The flux-cored wire has the advantage that the hardness of a surfacing alloy can be guaranteed to be more than HRC55.

Description

technical field [0001] This patent belongs to the technical field of welding materials B23k35, in particular to a self-protecting wear-resistant flux-cored welding wire for hot-rolled blanking rolls. Background technique [0002] Hot rolling is to heat a thick steel billet to 1000-1250 degrees Celsius to open the billet according to a certain shape. The rolls required for billet opening are called hot rolling billet rolls. The most common hot rolling is to use slabs (mainly continuous casting slabs) as raw materials, and roll the slabs into intermediate billets with a thickness of about 30-60mm through strip billet rolls, and then the next step of finishing rolling requires size of. The hot-rolled billet rolls of section steel rolls are usually composed of several different-shaped pass types to achieve reversible rolling. Due to the high rolling temperature, the roll needs to be water-cooled, so the hot roll is required to have sufficient thermal strength, wear resistance,...

Claims

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Application Information

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IPC IPC(8): B23K35/22B23K35/28
CPCB23K35/308B23K35/368
Inventor 陈泽荣雷万钧张渭
Owner 天津雷公焊接材料有限公司
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