Composite roller repairing method using laser rapid prototyping

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 ...

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.