Welding flux core welding wire for continuous cast roller over laying welding

A technology of continuous casting rolls and surfacing electrodes, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of insufficient wear resistance, fatigue cracks, slow Cr diffusion speed, etc. The effect of good abrasion resistance

Inactive Publication Date: 2005-03-23
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, domestic continuous casting roll surfacing mainly adopts HCr13 series surfacing materials, and its main problems are: (1) poor corrosion resistance; (2) poor thermal fatigue resistance; (3) insufficient wear resistance, Make continuous casting roll life lower
The continuous casting roll of this type of alloy surfacing welding is susceptible to corrosion damage and fatigue cracks after welding. The main reason is that the temperature range of the continuous casting roll is 400-900 °C, and the solubility of C in the matrix structure is about 0.6%. C that exceeds the solubility will diffuse to the grain boundary, and it is very easy to react with Cr along the grain boundary to form Cr carbide and precipitate at the grain boundary. Cr will continue to diffuse to the boundary of these particles. Due to the slow diffusion rate of Cr inside the grain, When Cr carbides are formed, the supply of Cr may be in short supply, resulting in a thin layer on the grain surface near the grain boundary seriously lacking Cr, which is lower than the critical value of 12%, and obvious grain boundary corrosion occurs, crack sources are generated, and soon formed Fatigue cracks affect the further improvement of the life of continuous casting rolls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Ferromanganese, ferrosilicon, ferrochrome, ferrovanadium, ferronickel, manganese-nitrogen alloy, vanadium-nitrogen alloy, ferro-niobium, ferro-tungsten, aluminum and other ferroalloy powders, iron powder, chromium powder, etc. are taken in a certain proportion and mixed evenly. Its composition is: C 0.10%, Si 1.20%, Mn 1.45%, Cr 13.6%, Ni 3.5%, V 0.03%, Nb 0.025%, Ti 0.25%, W 0.07%, N 0.10%, Al 0.05%, S≤ 0.03%, P≤0.03%, and the balance is Fe, all of the above are percentages by weight, and the sum of the percentages is 100%. Put the powder mixture in the above ratio into the steel belt groove, and then draw it into a Φ4.0mm welding wire, which is used for surfacing continuous casting rolls with an oscillating submerged arc welding machine. The surfacing alloy has good wear resistance and crack resistance.

Embodiment 2

[0015] Ferromanganese, ferrosilicon, ferrochrome, ferrovanadium, ferronickel, manganese-nitrogen alloy, vanadium-nitrogen alloy, ferro-niobium, ferro-tungsten, aluminum and other ferroalloy powders and iron powder, chromium powder, copper, etc. are taken in a certain proportion, and evenly Mixed, its composition is: C 0.08%, Si 1.10%, Mn 0.80%, Cr 13.2%, Ni 3.8%, V 0.05%, Nb 0.13%, Ti 0.10%, W 0.08%, Cu 0.15%, N 0.09%, Al 0.05%, S ≤ 0.03%, P ≤ 0.03%, the balance is Fe, all of the above are weight percentages, and the sum of the percentages is 100%. Put the powder mixture of the above ratio into the steel belt groove, and then draw it into a Φ3.2mm welding wire, which is used for surfacing continuous casting rolls by the swing submerged arc welding machine. The surfacing alloy has good wear resistance and corrosion resistance. Good crack resistance.

Embodiment 3

[0017] Ferromanganese, ferrosilicon, ferromolybdenum, ferrochrome, ferrovanadium, ferronickel, manganese-nitrogen alloy, vanadium-nitrogen alloy, ferro-niobium, ferro-tungsten, aluminum and other ferroalloy powders and iron powder, chromium powder, rare earth, copper, aluminum, etc. Take the material according to a certain proportion and mix it evenly. The composition is: C 0.08%, Si 0.70%, Mn 0.45%, Cr 12.0%, Ni 0.5%, Mo 0.3%, V 0.02%, Nb 0.02%, Ti 0.05%, W 0.03%, Cu 0.01%, Re 0.06%, N 0.06%, Al 0.03%, S≤0.03%, P≤0.03%, the balance is Fe, all of the above are weight percentages, and the sum of percentages is 100%. Put the powder mixture in the above ratio into the steel belt groove, and then draw it into a Φ2mm welding wire, which is used for surfacing continuous casting rolls by open arc welding machines. The surfacing alloy has good wear resistance, good corrosion resistance, and crack resistance. it is good.

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PUM

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Abstract

A flux-cored welding wire for the build-up welding of conticast roller in order to improve its antiwear, anticorrosion and hot fatigue resistant properties contains proportionally C, Si, Mn, Cr, Ni, V, Nb, Ti, W, N, Al, and one or more of Cu, Re and Mo.

Description

technical field [0001] The invention relates to a welding material, especially a flux-cored wire used for surfacing continuous casting rolls. Background technique [0002] At present, domestic continuous casting roll surfacing mainly adopts HCr13 series surfacing materials, and its main problems are: (1) poor corrosion resistance; (2) poor thermal fatigue resistance; (3) insufficient wear resistance, The continuous casting roll life is lower. The continuous casting roll of this type of alloy surfacing welding is susceptible to corrosion damage and fatigue cracks after welding. The main reason is that the temperature range of the continuous casting roll is 400-900 °C, and the solubility of C in the matrix structure is about 0.6%. C that exceeds the solubility will diffuse to the grain boundary, and it is very easy to react with Cr along the grain boundary to form Cr carbide and precipitate at the grain boundary. Cr will continue to diffuse to the boundary of these particles....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24B23K35/30
Inventor 林剑东何藩刘洪明罗传越李强曾培军刘茂军罗在祥刘国志
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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