Novel continuous casting roller surfacing technology

Abstract

The invention provides a novel continuous casting roller surfacing technology, solving the technical problems of surfacing blind area and poor surfacing stress state which exist in a swing spiral surfacing in the prior art. The novel continuous casting roller surfacing technology mainly comprises the following steps: a continuous casting roller (1) rotates step by step, a welding torch (3) moves back and forth for surfacing, that is, the continuous casting roller (1) does not rotate, the welding torch (3) moves to (4-2) surfacing from (4-1) surfacing along the direction of an axes (2), the continuous casting roller (1) rotates with a welding bead width M, and the welding torch (3) moves to (5-1) surfacing from (5-2) surfacing along the direction of the axes (2), the continuous casting roller (1) rotates and the welding torch (3) moves in cycles, thereby realizing the surfacing of whole continuous casting roller surface after finishing a cycle of surfacing of the roller surface. The novel continuous casting roller surfacing technology is mainly used for repairing the continuous casting roller (1).

Description

technical field [0001] The invention belongs to the technical field of surfacing welding, and in particular relates to a novel surfacing welding process for continuous casting rolls. Background technique [0002] Continuous casting equipment has been widely used in major steel mills in my country. Continuous casting rolls are the main consumption parts in continuous casting equipment. Continuous casting rolls include three parts: crystallization section, sector section and horizontal section. Especially the crystallization section and fan section, on the one hand, they have to bear the high temperature wear of the high temperature billet and the cyclic load caused by the bulging force and static pressure generated by the billet, and also bear the cold and heat fatigue of the spray cooling water and the high temperature billet. Therefore, after working for a period of time, the roll surface will have wear, corrosion, deformation and thermal fatigue cracks. When the depth of ...

AI Technical Summary

Problems solved by technology

[0006] 1. The stress state of the weld bead is not good. The circumferential weld bead formed by the swing has an oblique angle to the axial direction of the continuous casting roll, resulting in shear residual stress, which can easily cause deformation of the small diameter continuous casting roll and difficult installation. The roll breaks during use

[0007] 2. The weld bead cannot completely cover the surface of the continuous casting roll, and a surfacing welding blind zone is formed at both ends of the continuous casting roll

Blind areas need to be surfacing separately, regardless of machine surfacing or manual surfacing blind areas, it will consume time and consumables, and the quality is not easy to guarantee

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