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Low roller deformation hot roller laser repair method

A laser repairing and hot rolling technology, applied in the field of laser cladding, can solve the problems of poor surfacing, easy cracks, insufficient hardness, etc., and achieve high fusion rate, optimized overlap, and uniform thickness and hardness.

Inactive Publication Date: 2017-04-19
DANYANG HONGTU LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the reason of the material, the surfacing of hot rolls is very poor. Using ordinary surfacing methods will easily cause defects such as cracks, pores, and insufficient hardness, which makes the repair of rolls of this type of material difficult.

Method used

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  • Low roller deformation hot roller laser repair method
  • Low roller deformation hot roller laser repair method
  • Low roller deformation hot roller laser repair method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The specific steps of the laser repair method for the hot roll of this embodiment are as follows:

[0024] A. The surface of the hot roll to be repaired is pretreated, and the hot roll is inspected and analyzed.

[0025] Remove the dust, oil, and rust on the hot roll; detect the size of each part of the hot roll to determine the failure location and its wear; perform radial and end runout tests on the hot roll to check whether the roll is deformed; remove the roll by polishing The fatigue layer of the failed part is 0.5mm and cleaned.

[0026] B. According to the failure analysis results of the hot roll, optimize the process parameters and perform multi-layer laser cladding.

[0027] Using the preset powder feeding method, using the fast cross-flow carbon dioxide laser as the light source to perform continuous spiral feed overlap scanning of the hot roll; the laser power is 2150W, the elevation (that is, the distance between the laser and the target, elevation = focal length + ...

Embodiment 2

[0036] The specific steps of the laser repair method for the hot roll of this embodiment are as follows:

[0037] A. The surface of the hot roll to be repaired is pretreated, and the hot roll is inspected and analyzed.

[0038] Remove the dust, oil, and rust on the hot roll; detect the size of each part of the hot roll to determine the failure location and its wear; perform radial and end runout tests on the hot roll to check whether the roll is deformed; remove the roll by polishing The fatigue layer of the failed part is 0.5mm and cleaned.

[0039] B. According to the failure analysis results of the hot roll, optimize the process parameters and perform multi-layer laser cladding.

[0040] Using the preset powder feeding method, using the fast cross-flow carbon dioxide laser as the light source to perform continuous spiral feed overlap scanning on the hot roll; the laser power is 2160W, the elevation is 235mm, the spot size is 12mm×1.8mm, and the scanning speed is 150mm / min. , The o...

Embodiment 3

[0049] The specific steps of the laser repair method for the hot roll of this embodiment are as follows:

[0050] A. The surface of the hot roll to be repaired is pretreated, and the hot roll is inspected and analyzed.

[0051] Remove the dust, oil, and rust on the hot roll; detect the size of each part of the hot roll to determine the failure location and its wear; perform radial and end runout tests on the hot roll to check whether the roll is deformed; remove the roll by polishing The fatigue layer of the failed part is 0.5mm and cleaned.

[0052] B. According to the failure analysis results of the hot roll, optimize the process parameters and perform multi-layer laser cladding.

[0053] Using the preset powder feeding method, using the fast cross-flow carbon dioxide laser as the light source to perform continuous spiral feed overlap scanning on the hot roll; the laser power is 2200W, the elevation is 240mm, the spot size is 12mm×1.8mm, and the scanning speed is 140mm / min. , The o...

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Abstract

The present invention relates to a low roller deformation hot roller laser repair method, wherein a transition alloy layer, an intermediate alloy layer and a surface alloy layer are sequentially subjected to laser cladding on the surface of a hot roller from the inner layer, the components of the alley powder used by the transition alloy layer comprise, by mass, 0.2-0.3% of C, 3.2-3.6% of Si, 1.2-1.8% of B, 2.2-2.6% of Fe, 7-8% of Cr and the balance of Ni, the components of the alley powder used by the intermediate alloy layer comprise, by mass, 0.4-0.5% of C, 3.8-4.3% of Si, 12-13% of B, 2.5-3.2% of Fe, 10-12% of Cr and the balance of Ni, and the components of the alley powder used by the surface alloy layer comprise, by mass, 0.05-0.1% of C, 3.0-3.16% of Si, 2-4% of Fe, 16-19% of Cr, 27-30% of Mo, and the balance of Co. According to the present invention, the hot roller repaired by using the hot roller laser repair method of the present invention has good abrasion resistance, good corrosion resistance and good thermal rigidity of the surface, has good toughness and good strength of the internal, and has good laser cladding effect.

Description

Technical field [0001] The invention relates to a laser cladding method, in particular to a laser cladding method of a hot roll. Background technique [0002] Rolls are the largest consumable in my country's metallurgical industry, and hot rolls are one of the main spare parts consumed in steel rolling production, and their consumption is far greater than cold rolls. The consumption of hot rolls is about 5% to 15% of the production cost of rolled steel. The quality of hot-rolled rolls is not only related to the production cost of rolled steel and the production rate of the rolling mill, but also affects the quality of the rolled material to a large extent. With the development of steel rolling technology, the speed and automation of rolling mills continue to increase, and higher requirements are put forward for the quality of hot rolls, especially the wear resistance, strength and toughness of hot rolls. [0003] The obvious trend in the development of hot roll materials is to us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05C22C19/07C22C30/00
CPCC23C24/103C22C19/058C22C19/07C22C30/00
Inventor 何建方刘少彬马万花
Owner DANYANG HONGTU LASER TECH
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