Bottom layer submerged arc flux cored wire for continuous casting machine zero segment continuous casting roll repair

A technology of flux-cored welding wire and continuous casting roll, applied in arc welding equipment, welding equipment, welding medium and other directions, can solve the micro cracks and layered tearing off of the original roll and the surfacing welding material, the comprehensive production cost is high, and the production process Complicated and other problems, to achieve the effect of high utilization rate of welding wire, improved fusion, and good welding processability

Active Publication Date: 2020-09-04
鞍山冶金集团炼钢服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main problem in the current surfacing and remanufacturing roll technology is that the original roll and the surfacing material are prone to micro-cracks and layered tearing defects during use. Therefore, in addition to adjusting the process parameters, it is urgent to develop a good combination performance and Primer material with excellent physical and chemical properties
[0006] It can be seen that the protection and repair of continuous casting rolls in the prior art mostly use open arc welding wire, but open arc welding wire has the disadvantages of many types of raw materials, complex production process, long manufacturing cycle, and high overall production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]This embodiment provides a primer submerged arc flux-cored wire for repairing zero-stage continuous casting rolls of a continuous casting machine. The flux-cored wire includes a low-carbon cold-rolled steel strip and powder. 21 parts of carbon ferrochrome powder, 0.6 part of 45 ferrosilicon powder, 1.2 parts of medium carbon ferromanganese powder, 1.5 parts of ferromolybdenum powder, 2.1 parts of nickel powder, 0.2 parts of vanadium iron powder, 13 parts of reduced iron powder;

[0032] Wire diameter φ3.2mm, filling factor 39.6%.

[0033] Wherein, the content of carbon in the microcarbon ferrochrome powder is 0.06%, and the content of chromium is 65wt%; the content of carbon in the described medium carbon ferromanganese powder is 1.5wt%, and the content of manganese is 78wt%; the 45 The silicon content in the ferrosilicon powder is 45wt%, the molybdenum content in the molybdenum iron powder is 55wt%, and the vanadium content in the vanadium iron powder is 50wt%.

[0034...

Embodiment 2

[0037] This embodiment provides a primer submerged arc flux-cored wire for repairing zero-stage continuous casting rolls of a continuous casting machine. The flux-cored wire includes a low-carbon cold-rolled steel strip and powder. 23 parts of carbon ferrochromium powder, 0.5 part of 45 ferrosilicon powder, 0.9 part of medium carbon ferromanganese powder, 2.2 parts of ferromolybdenum powder, 2.4 parts of nickel powder, 0.1 part of vanadium iron powder, and 12 parts of reduced iron powder.

[0038] Wire diameter φ3.2mm, filling factor 41.1%.

[0039] Wherein, the content of carbon in the microcarbon ferrochrome powder is 0.06%, and the content of chromium is 65wt%; the content of carbon in the described medium carbon ferromanganese powder is 1.5wt%, and the content of manganese is 78wt%; the 45 The silicon content in the ferrosilicon powder is 45wt%, the molybdenum content in the molybdenum iron powder is 55wt%, and the vanadium content in the vanadium iron powder is 50wt%.

...

Embodiment 3

[0043] This embodiment provides a primer submerged arc flux-cored wire for repairing zero-stage continuous casting rolls of a continuous casting machine. The flux-cored wire includes a low-carbon cold-rolled steel strip and powder. 25 parts of carbon ferrochrome powder, 0.6 part of 45 ferrosilicon powder, 1.2 parts of medium carbon ferromanganese powder, 2 parts of ferromolybdenum powder, 2 parts of nickel powder, 0.1 part of vanadium iron powder, and 10 parts of reduced iron powder.

[0044] Wire diameter φ2.8mm, filling factor 42%.

[0045] Wherein, the content of carbon in the microcarbon ferrochrome powder is 0.06%, and the content of chromium is 65wt%; the content of carbon in the described medium carbon ferromanganese powder is 1.5wt%, and the content of manganese is 78wt%; the 45 The silicon content in the ferrosilicon powder is 45wt%, the molybdenum content in the molybdenum iron powder is 55wt%, and the vanadium content in the vanadium iron powder is 50wt%.

[0046] ...

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Abstract

The invention provides a bottom layer submerged arc flux cored wire for continuous casting machine zero segment continuous casting roll repair. The flux cored wire comprises a low carbon cold rolled steel strip and flux powder, wherein the flux powder comprises the following components of, in parts by weight, 21-27 parts of micro-carbon ferrochrome powder, 0-1 part of 45 silicon iron powder, 0.5-1.5 parts of medium carbon ferromanganese powder, 1.5-2.5 parts of molybdenum iron powder, 1.5-2.5 parts of nickel powder, 0-0.7 parts of ferrovanadium powder and 10-15 parts of reduced iron powder. The nickel powder is added to the submerged arc flux cored wire to transit more nickel elements to a welding layer, the impact toughness and wear resistance of the bottom layer are improved, meanwhile,the nickel elements are transited to surface layer deposited metal during working layer welding, the surface abrasion resistance and the low-temperature impact toughness of a continuous casting rollare improved, the service life is prolonged, a variety of a flux cored wire raw material is small, the production process is simple, and the comprehensive cost is low.

Description

technical field [0001] The invention belongs to the technical field of surface repair of metal materials, and relates to a flux-cored welding wire, in particular to a submerged-arc flux-cored welding wire for submerging a bottom layer for repairing zero-section continuous casting rolls of a continuous casting machine. Background technique [0002] The continuous casting roll is a key component of the continuous casting machine. It is in continuous contact with the high-temperature slab that has not yet solidified inside, and at the same time it is subjected to repeated action of cooling water. The working conditions are very harsh, and the roll surface is prone to cold and heat fatigue cracks. , Oxidation corrosion and wear and other damage forms, serious and even cause roll breakage accidents, when the cracks on the roll surface extend to a certain depth, the continuous casting roll must be repaired or scrapped. The service life of the continuous casting roll is often the k...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B23K35/24B23K9/18
CPCB23K35/24B23K35/0266B23K9/18
Inventor孙沛沛刘鑫丑煦泽
Owner鞍山冶金集团炼钢服务有限公司