A preparation method for repairing continuous casting roll axial additive

Abstract

The invention discloses a preparation method for repairing continuous casting rolls by adding axial materials, which belongs to the technical field of repairing mechanical parts. The preparation method comprises step 1 turning the roll surface to remove the corrosion fatigue layer of the continuous casting roll; step 2 turning End face, turning each end face to a certain size; step 3 welding patch, spot welding the patch on the two axial end faces of the continuous casting roll after turning, step 4 overall surfacing of the roll surface, and burying the roll surface of the continuous casting roll as a whole Arc surfacing wear-resistant alloy layer; step 5 machining replica, machining replica of the air-cooled continuous casting roll; step 6 inspection, surface coloring flaw detection of the machined continuous casting roll, testing the continuous casting roll Whether there are defects such as cracks on the surface; step 7 packaging, coating the qualified continuous casting rolls with anti-rust oil, and packing them for use. The present invention can increase the repairable times of the continuous casting rolls and reduce the waste of materials.

Description

technical field [0001] The invention relates to a preparation method for repairing continuous casting rolls by adding axial materials, and belongs to the technical field of repairing mechanical parts. Background technique [0002] The continuous casting roll is an important part of the continuous casting machine, which bears the functions of carrying and driving the billet and the movable billet mold. In use, the continuous casting rolls are in continuous contact with the red-hot slab that has not yet solidified inside, not only repeatedly subjected to the alternating cold and heat shock cycles of local high-temperature heating and water cooling, but also subjected to the alternating bulging force and static pressure of the slab. Mechanical stress, harsh working conditions. After using for a period of time, the roller surface often has different degrees of network cracks, oxidation corrosion, burning, wear and other conditions, which lead to failure, which seriously affects...

AI Technical Summary

Problems solved by technology

After repairing for 2~5 times, the length of the continuous casting roll will be 5~8mm shorter than the standard size, resulting in an increase in the gap between the end face of the continuous casting roll and the bearing seat, and impurities such as billet oxide skin can easily enter the bearing in the bearing seat, thereby causing Bearing short-term grinding failure

Due to the relatively thin wall thickness of the end face of the continuous casting roll, traditional surfacing and manual welding for additive manufacturing of the end face can easily lead to deformation of the end face, affecting the sealing and assembly of the continuous casting roll, and the repair yield and efficiency are low in actual production