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A laser repair method for high-pressure water descaling header

A technology of high-pressure water descaling and laser repair, which is applied in coatings, metal material coating processes, etc., can solve the problems of inability to repair, reduce the cost of high-pressure water descaling technology, and only replace it with new ones, and achieve strong corrosion resistance , good creep limit, good plastic effect

Active Publication Date: 2020-02-21
SHENYANG DALU LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the present invention provides a laser repair method for the high-pressure water descaling header. In the repair process, a special repair material is applied to the high-pressure water descaling header, and the laser repair process is strictly controlled. parameter, which effectively solves the problem that cannot be repaired and can only be replaced with a new one, and greatly reduces the technical cost of high-pressure water descaling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Repair of high pressure water descaling header in X steel plant.

[0019] The base material of the high pressure water descaling header is 34CrNiMo 6 .

[0020] The chemical composition of the cladding material is Ni: 35%, Cu: 20%, Fe: 10%, La: 0.2%, Yb: 0.2%, Y: 0.2%, Sc: 0.2%, Pr: 0.2%, Cr: Yu quantity.

[0021] Since there is an included angle of 15° between the repair surface of the descaling header and the horizontal, it is adjusted through the hydraulic system to make the repair surface consistent with the horizontal plane, and a level is used for correction.

[0022] The laser repair process of the high-pressure water descaling header, the steps are as follows: Step 1. Fix the tooling on the CNC machining milling machine, place the dephosphorization header on the tooling, and adjust it through the hydraulic system according to the technical requirements of the drawing so that the repaired surface and the horizontal plane Consistent, and corrected with a level ...

Embodiment 2

[0025] Repair of high pressure water descaling header in Y steel plant.

[0026] The base material of the high pressure water descaling header is 34CrNiMo 6 .

[0027] The chemical composition of the cladding material is Ni: 36%, Cu: 15%, Fe: 11%, La: 1%, Yb: 0.5%, Y: 0.1%, Sc: 0.1%, Pr: 0.5%, Cr: Yu quantity.

[0028]The laser repair process of the high-pressure water descaling header, the steps are as follows: Step 1. Place the phosphorus removal header on the tooling, adjust it through the hydraulic system according to the technical requirements of the drawing, so that the repair surface of the phosphorus removal header is consistent with the horizontal plane, and use a level Calibration, requirements: levelness ≤ 0.03; according to the damage situation, carry out benchmark determination and mechanical processing of the repaired parts of the water descaling header, clean up the fatigue layers such as corrosion and iron oxide scale on the surface, and require that there sh...

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Abstract

The invention belongs to the field of repair of high-pressure water descaling equipment and relates to a method adopting the laser cladding technology to repair a high-pressure water descaling header,in particular to a laser repair method for a high-pressure water descaling header. Anti-corrosion alloy powder for laser cladding mainly comprises the following chemical ingredients: 35-40% of Ni, 15-20% of Cu and 10-12% of Fe. Besides the above ingredients, at least three of the following rare earth elements are added by percent: 0.1-1% of La, 0.1-0.5% of Yb, 0.1-0.5% of Y, 0.1-0.5% of Sc, 0.1-0.5% of Pr and the balance of Cr. The problem that only maintenance but not change for new is allowed is effectively solved, and the technical cost in high-pressure water descaling is greatly lowered.

Description

technical field [0001] The invention belongs to the field of repairing high-pressure water descaling equipment, and in particular relates to a method for repairing a high-pressure water descaling header by using laser cladding technology, specifically a laser repair method for a high-pressure water descaling header. Background technique [0002] It is used for the internal descaling header of the high-pressure water descaling box for hot-rolled strips. The bearing descaling pressure is generally about 400bar, and the descaling water quality is weakly alkaline. At 1200°C, the junction surface of the descaling header nozzle is prone to thermal deformation; the nozzle surface of the header and the inlet side are continuously washed and worn by the high-pressure descaling water rebounded from the slab (the rebounded high-pressure descaling water contains a large amount of high-speed splash At the same time, a large amount of water vapor headers are corroded during production. Af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C30/02
CPCC22C19/058C22C27/06C22C30/02C23C24/106
Inventor 李佳张静波刘文孝
Owner SHENYANG DALU LASER TECH
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