High-hardness self-protecting flux-cored welding wire for overlaying repair of continuous casting roller

A technology of flux-cored welding wire and continuous casting roll, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of increasing labor intensity of workers, using a large amount of flux, and low production efficiency, so as to improve the effect of removing impurities and dehydrogenation , Reduce the labor intensity of workers and improve the service life

Inactive Publication Date: 2015-06-10
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the welding methods used today are submerged arc surfacing, which requires a large amount of flux, which increases the cost, and the slag needs to be continuously knocked out during the surfacing process, which increases the labor intensity of workers and lowers production efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] High-hardness self-shielding continuous casting roll surfacing flux-cored wire includes sheath and flux core, and the flux core accounts for 25% of the total weight of the flux-cored wire; the sheath is made of H08A cold-rolled steel strip, and the chemical composition (weight percentage) of the flux core is: TiO2 : 38%, high carbon ferrochrome: 5.5%, low carbon ferrochrome: 30%, Mn-Si alloy: 0.6%, Al-Mg alloy: 2.5%, Ni: 5.5%, CaF2: 0.8%, Mo: 5% , V: 0.8%, Cr: 2.8%, Al2O3: 2.1%, iron powder: 6.4%.

[0038] The weight percentage of Al in Al-Mg alloy is 45%; the weight percentage of Mn in Mn-Si alloy is 44%; the weight percentage of C in high carbon ferrochrome is 6.2%, and the weight percentage of Cr is 54%; the weight percentage of C in low carbon ferrochrome The percentage is 0.11%, and the Cr weight percentage is 56%.

Embodiment 2

[0040] High-hardness self-shielding continuous casting roll surfacing flux-cored wire includes sheath and flux core, and the flux core accounts for 28% of the total weight of the flux-cored wire; the sheath is made of H08A cold-rolled steel strip, and the chemical composition (weight percentage) of the flux core is: TiO2 : 25%, high carbon ferrochrome: 12%, low carbon ferrochrome: 17%, Mn-Si alloy: 4.6%, Al-Mg alloy: 3.1%, Ni: 12%, CaF2: 0.4%, Na3AlF6: 1.5% , Mo: 8%, V: 1.9%, Cr: 6%, Al2O3: 3.3%, iron powder: 5.2%.

[0041] The weight percentage of Al in Al-Mg alloy is 50%; the weight percentage of Mn in Mn-Si alloy is 48%; the weight percentage of C in high carbon ferrochrome is 8.2%, and the weight percentage of Cr is 74%; the weight percentage of C in low carbon ferrochrome The percentage is 0.31%, and the Cr weight percentage is 66%.

Embodiment 3

[0043] High-hardness self-shielding continuous casting roll surfacing flux-cored wire includes sheath and flux core, and the flux core accounts for 32% of the total weight of the flux-cored wire; the sheath is made of H08A cold-rolled steel strip, and the chemical composition (weight percentage) of the flux core is: TiO2 : 31%, high carbon ferrochrome: 8%, low carbon ferrochrome: 26%, Mn-Si alloy: 2.2%, Al-Mg alloy: 0.8%, Ni: 9%, BaF2: 1.3%, Mo: 14% , V: 1.4%, Cr: 4.5%, Al2O3: 0.6%, iron powder: 3.2%.

[0044] The weight percentage of Al in Al-Mg alloy is 55%; the weight percentage of Mn in Mn-Si alloy is 49%; the weight percentage of C in high carbon ferrochrome is 7.2%, and the weight percentage of Cr is 76%; the weight percentage of C in low carbon ferrochrome The percentage is 0.22%, and the Cr weight percentage is 76%.

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Abstract

The invention discloses a high-hardness flux-cored welding wire for overlaying repair of a continuous casting roller, and belongs to the technical field of welding in material processing engineering. An H08A cold-rolled steel strip is adopted as an outer cover, a flux core comprises the following components in percentage by weight: 20-40% of TiO2, 5-15% of high-carbon ferrochrome, 12-30% of low-carbon ferrochrome, 0.5-5% of Mn-Si alloy, 0.5-5% of Al-Mg alloy, 5-15% of Ni, 0.5-2.5% of fluoride, 5-15% of Mo, 0.5-2.5% of V, 2-10% of Cr, 0.5-5% of Al2O3 and the balance of iron powder. The filling rate of the traditional Chinese medicine core of the flux-cored welding wire is 20-35%. The welding wire has the advantages that the flux-cored welding wire adopts a self-protecting overlaying manner, and shielding gas and welding flux are not needed in the overlaying repair process of the continuous casting roller, so that the repair cost can be greatly reduced, the manual labor intensity is lowered, and the production efficiency is improved; the welding wire has good arc stability, excellent abrasion-proof property and excellent thermal fatigue resistant property, and the service life of the continuous casting roller is effectively prolonged.

Description

technical field [0001] The invention belongs to the field of welding technology in material processing engineering, and in particular provides a self-shielding flux-cored welding wire for surfacing repair of high-hardness continuous casting rolls, which is mainly used for surfacing repairing of continuous casting rolls in steel mills. Background technique [0002] Continuous casting equipment has been widely used in major steel mills in my country. Continuous casting rolls are the main consumption parts in continuous casting equipment. Continuous casting rolls are subjected to high-temperature wear of high-temperature billets and the bulging force and static pressure generated by billets cause circulation. At the same time as the load, it must also bear the cold and heat fatigue of spray cooling water and high-temperature steel billets. Therefore, after working for a period of time, the roll surface will have wear, corrosion, deformation and thermal fatigue cracks. When the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368
CPCB23K35/0266B23K9/048B23K35/3608B23K35/368
Inventor 牟淑坤张飞虎金茹章军陈延清王凤会刘宏
Owner SHOUGANG CORPORATION
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