High-speed laser cladding method of boiler pipe and boiler pipe

A technology of laser cladding and boiler tubes, which is applied in coating, metal material coating technology, etc., can solve the problems of not being widely used, expensive, and difficult to implement, so as to simplify machining procedures, reduce material consumption, and improve processing efficiency effect

Inactive Publication Date: 2019-12-27
SHANDONG ENERGY HEAVY EQUIP GRP DAZU REMANUFACTURING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional protection, such as installing protective tiles, infiltrating alloy on the surface of the pipe wall, etc., cannot be widely used due to high price or difficulty in implementation.

Method used

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  • High-speed laser cladding method of boiler pipe and boiler pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high-speed laser cladding method for boiler tubes, the specific steps are as follows:

[0023] S1: Processing and testing before cladding. Machining the boiler tubes to be processed, testing the original specifications and sizes, and setting aside processing allowances according to technical requirements. The machining allowance is generally the diameter after cladding minus the diameter of the final product, and the machining allowance in this embodiment is not less than 0.2mm.

[0024] S2: Surface pretreatment, degreasing the workpiece to ensure the bonding between the cladding layer and the substrate. Specifically, use alcohol to wipe and sandpaper to polish the area to be clad to remove rust, oil and dirt.

[0025] S3: High speed cladding. Firstly, the boiler tube to be processed is placed on the lathe, clamped by the positioner, and positioned and aligned; then the robot grabs the laser and advances along the axis of the boiler tube with a step distance of 0.5...

Embodiment 2

[0030] A high-speed laser cladding method for boiler tubes, the specific steps are as follows:

[0031] S1: Processing and testing before cladding. Machining the boiler tubes to be processed, testing the original specifications and sizes, and setting aside processing allowances according to technical requirements. The machining allowance is generally the diameter after cladding minus the diameter of the final product, and the machining allowance in this embodiment is not less than 0.2 mm.

[0032] S2: Surface pretreatment, degreasing the workpiece to ensure the bonding between the cladding layer and the substrate. Specifically, use alcohol to wipe and sandpaper to polish the area to be clad to remove rust, oil and dirt.

[0033] S3: High speed cladding. Firstly, the boiler tube to be processed is placed on the lathe, clamped by the positioner, and positioned and aligned; then the robot grabs the laser and advances along the axis of the boiler tube with a step distance of 0....

Embodiment 3

[0038] A high-speed laser cladding method for boiler tubes, the specific steps are as follows:

[0039] S1: Processing and testing before cladding. Machining the boiler tubes to be processed, testing the original specifications and sizes, and setting aside processing allowances according to technical requirements. The machining allowance is generally the diameter after cladding minus the diameter of the final product, and the machining allowance in this embodiment is not less than 0.2mm.

[0040] S2: Surface pretreatment, degreasing the workpiece to ensure the bonding between the cladding layer and the substrate. Specifically, use alcohol to wipe and sandpaper to polish the area to be clad to remove rust, oil and dirt.

[0041] S3: High speed cladding. Firstly, the boiler tube to be processed is placed on the lathe, clamped by the positioner, and positioned and aligned; then the robot grabs the laser and advances along the axis of the boiler tube with a step distance of 1.0...

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Abstract

The invention belongs to the technical field of laser cladding, and particularly relates to a high-speed laser cladding method of a boiler pipe. Firstly, the to-be-machined boiler pipe is machined toleave a machining allowance, then rust and oil stains are removed, finally, the to-be-machined boiler pipe is placed on a lathe, laser cladding parameters are set, and laser cladding is started; and the invention further relates to the boiler pipe, and the cladding method is used for cladding. According to the high-speed laser cladding method and the boiler pipe, the high-speed laser cladding hasextremely high cladding line speed, large-area preparation of a coating can be achieved in a short time, high-precision forming on the surface of a part can be obtained, cladding lapping is smooth, and the surface roughness is small.

Description

technical field [0001] The invention belongs to the technical field of laser cladding, and in particular relates to a high-speed laser cladding method for a boiler tube and the boiler tube. Background technique [0002] Bursting and leakage of boiler tubes is one of the important reasons leading to unplanned shutdown. The failure forms include poor material, overheating, wear, corrosion, welding defects, etc. Among them, accidents caused by wear failure are more prominent. Boiler tubes are at a high temperature of 500-1200°C, and the heating surface of the boiler tube wall is continuously scoured by high-speed flue gas, and the tube wall becomes thinner due to wear and tear until the tube bursts. Traditional protection, such as installing protective tiles and infiltrating alloy on the surface of the pipe wall, cannot be widely used due to high price or difficulty in implementation. Contents of the invention [0003] Aiming at various deficiencies in the prior art, the inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05
CPCC22C19/056C23C24/103
Inventor 杨庆东澹台凡亮田洪芳李光浩郎坤杜学芸刘虎王伟
Owner SHANDONG ENERGY HEAVY EQUIP GRP DAZU REMANUFACTURING CO LTD
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