Repaired roller and method for repairing roller

Abstract

The invention relates to a repaired roller and a method for repairing a roller. The method comprises the following steps of: mechanically cutting the waste roller to be repaired along the external surface to remove a worn layer to obtain a roller core, arranging selected cladding material on the surface of the roller core by different addition manners, and irradiating with laser to melt the cladding material together with the surface of the roller to form a cladding layer. The laser cladding layer consists of a cladding surface layer, a cladding intermediate layer and a laser cladding bottom layer and can form gradual functional materials with respective characteristics. The repaired roller has improved mechanical performance, prolonged service life and lowered production cost.

Description

technical field [0001] The invention relates to iron and steel production equipment, in particular to a repaired roll and a method for repairing the roll. Background technique [0002] In steel rolling production, since the roll is the main processing part that directly contacts the rolled piece and forces the rolled piece to undergo plastic deformation, it must bear a large dynamic pressure, a large sliding speed between metals and a large bending stress, and To bear the impact of high temperature with large changes, the roll will be continuously worn during use. When the roll is worn to a certain extent, it must be repaired because it can no longer be used. [0003] At present, the repair method of rolls generally adopts the process of surfacing welding, and a lot of work needs to be prepared before welding, such as annealing treatment of roll blanks, machining of rolls to be surfacing, coloring flaw detection treatment, preheating treatment, and at the same time the base ...

AI Technical Summary

Problems solved by technology

[0003] At present, the repair method of the roll generally adopts the process of surfacing welding, and a lot of work needs to be prepared before welding, such as annealing of the roll blank, machining of the roll to be surfacing, coloring flaw detection treatment, preheating treatment, and at the same time, the base metal and the surfacing welding The layer is prone to phase change during surfacing, resulting in cracking

Therefore, the deficiencies in the existing roll surfacing repair process lead to poor mechanical properties of the repaired roll, which limits the service life of the roll and increases the production cost.

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