Composite roller repairing method using laser rapid prototyping

A technology of laser rapid prototyping and composite rolls, which is applied to furnace types, furnaces, heat treatment furnaces, etc., can solve problems such as cracks, poor welding bonding, and pores, and achieve simple process operation, high labor productivity, and good repair quality.

Inactive Publication Date: 2014-03-05
湖州市银鑫轧辊有限公司
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AI Technical Summary

Problems solved by technology

[0002] The existing roll repair technology usually adopts the form of surfacing welding. Its disadvantage is that it can only be used for surfacing repair of steel-based rolls. For other iron-based, high-carbon or high-alloy roll cores, due to the difference between the material of the surface working layer and the base body, welding The combination is poor, so the surfacing method is not suitable; secondly, the surfacing itself has some inherent defects, such as cracks, pores, inclusions, etc.

Method used

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Embodiment Construction

[0009] The laser rapid prototyping method for repairing composite rolls of the present invention uses a laser to repair scrapped rolls to form a working layer. When the coaxial powder feeding laser is in the rapid prototyping of the working layer, the X-ray online detection system detects and diagnoses whether the working layer is defective in real time. Once there is a defect , start the coaxial powder feeding laser to repair the defect; after the repaired or re-repaired working layer is qualified, the plasma trigger is used to heat-treat the working layer, and finally the working layer is finished to make a finished roll.

[0010] In the repair process of the present invention, the rotating speed of the roll is 0.1-5rpm, the coaxial powder feeding laser and the powder feeding rate of the laser are 400-1500mg / s, the powder particle size is 20-160μm, the laser scanning speed is 0.2-0.9m / min, and the output Power 2-4KW, laser beam spot size (10-20) mm×(2-5) mm.

[0011] Prefera...

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PUM

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Abstract

The invention relates to a composite roller repairing method using laser rapid prototyping. The method is characterized in that a scrap roller is repaired by a laser to form a working layer; when a coaxial powder delivery laser rapidly forms the working layer, an X-ray online detection system performs detection in real time and diagnoses whether the working layer has a defect; if so, the coaxial powder delivery laser is started to re-repair the defect; after the repaired or re-repaired working layer is qualified, the working layer is subjected to thermal treatment by a plasma trigger; finally, the working layer is subjected to finish machining to obtain a finished product of the roller. In the method provided by the invention, by adopting two groups of lasers, X-ray online detection and plasma thermal treatment, the pores and cracks easily generated in the existing laser rapid prototyping repairing process are avoided, the process is relatively simple to operate, the production period is short, the repairing quality is good, and the labor productivity is high.

Description

technical field [0001] The invention relates to a laser rapid forming method for repairing a composite roll. Background technique [0002] The existing roll repair technology usually adopts the form of surfacing welding. Its disadvantage is that it can only be used for surfacing repair of steel-based rolls. For other iron-based, high-carbon or high-alloy roll cores, due to the difference between the material of the surface working layer and the base body, welding The combination is poor, so the surfacing method is not suitable; secondly, the surfacing itself has some inherent defects, such as cracks, pores, inclusions, etc. In recent years, laser rapid prototyping technology for repairing roll surface has become an important development direction and approach to improve roll wear resistance and prolong roll service life, and has been extensively studied. This invention proposes a new plan for roll repair. Contents of the invention [0003] Aiming at the problems existing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C23C24/10C21D9/38C21D1/09C22C38/24C22C38/46
Inventor 黄金荣范银芳
Owner 湖州市银鑫轧辊有限公司
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