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A continuous casting roller surfacing welding process

A continuous casting roll and process technology, applied in the field of surfacing, can solve the problems of poor weld bead stress state, time-consuming consumables, difficult quality assurance, etc., to avoid residual shear stress, save financial resources and manpower, and eliminate surfacing welding. blind spot effect

Inactive Publication Date: 2011-12-28
HARBIN WELDING INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The stress state of the weld bead is not good. The circumferential weld bead formed by the swing has an oblique angle to the axial direction of the continuous casting roll, resulting in shear residual stress, which can easily cause deformation of the small diameter continuous casting roll and difficult installation. The roll breaks during use
[0007] 2. The weld bead cannot completely cover the surface of the continuous casting roll, and a surfacing welding blind zone is formed at both ends of the continuous casting roll
Blind areas need to be surfacing separately, regardless of machine surfacing or manual surfacing blind areas, it will consume time and consumables, and the quality is not easy to guarantee

Method used

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  • A continuous casting roller surfacing welding process
  • A continuous casting roller surfacing welding process

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Embodiment 1

[0033] Continuous casting roll diameter: Ф100mm

[0034] Flux cored wire grade: YSD-414NO

[0035] Flux cored wire specification: Ф2.4mm

[0036] Swing bead length L: 50mm,

[0037] Oscillating frequency: 50 cycles / min,

[0038] Surfacing voltage: 27V,

[0039] Surfacing current: 350A,

[0040] Roller rotation step distance M: 2mm,

[0041] Number of surfacing layers: two layers,

[0042] There is no surfacing blind area on the surface of the continuous casting roll, saving time and effort, the surfacing layer is automatically deslagged, no defects, no residual shear stress on the surfacing layer, the continuous casting roll after surfacing has a low fracture probability during use, and is resistant to cold and heat fatigue , high temperature corrosion, strong wear resistance, long service life of continuous casting rolls.

Embodiment 2

[0044] Continuous casting roll diameter: Ф100mm

[0045] Flux cored wire grade: YSD-414NS,

[0046] Flux cored wire specification: Ф2.8mm

[0047] Swing bead length L: 50mm,

[0048] Oscillating frequency: 50 cycles / min,

[0049] Surfacing voltage: 31V

[0050] Surfacing current: 450A,

[0051] Roller rotation step distance: 2.5mm

[0052] Number of surfacing layers: two layers,

[0053] There is no surfacing blind area on the surface of the continuous casting roll, saving time and effort, the surfacing layer is automatically deslagged, no defects, no residual shear stress on the surfacing layer, the continuous casting roll after surfacing has a low fracture probability during use, and is resistant to cold and heat fatigue , high temperature corrosion, strong wear resistance, long service life of continuous casting rolls.

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Abstract

The invention proposes a surfacing welding process for continuous casting rollers. The surfacing welding process aims to solve the technical problems of surfacing welding blind areas and poor surfacing welding stress state existing in the swing spiral surfacing welding in the prior art. The surfacing welding process of the present invention mainly includes: continuous casting roll (1) step-by-step rotation and welding torch (3) reciprocating surfacing welding, that is, continuous casting roll (1) does not rotate, and welding torch (3) moves from the left end along the axis (2) to Move to the surfacing welding at the right end to complete the surfacing welding bead with a width of M and a length of L, the continuous casting roller (1) rotates for a bead width M, and the welding torch (3) still moves from the right end to the left end along the axis (2) Overlay welding, like this, goes round and round, and then realizes overlay welding on the surface of all continuous casting rolls after completing one week of overlay welding on the roller surface. This surfacing process is mainly used for repairing the continuous casting roll (1).

Description

technical field [0001] The invention belongs to the technical field of surfacing welding, and in particular relates to a surfacing welding process for continuous casting rolls. 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 include three parts: crystallization section, sector section and horizontal section. Especially the crystallization section and fan section, on the one hand, they have to bear the high temperature wear of the high temperature billet and the cyclic load caused by the bulging force and static pressure generated by the billet, and also bear the cold and heat fatigue of the spray cooling water and the high temperature billet. Therefore, after working for a period of time, the roll surface will have wear, corrosion, deformation and thermal fatigue cracks. When the depth of the cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/04B23K9/12
Inventor 程志国刘剑威刘孔丰李家宇许可贵李颜文赵春燕王闵生
Owner HARBIN WELDING INST LTD