Laser cladding repairing method for inner hole of rolling mill roller end shaft sleeve and composite device for laser cladding

A technology of laser cladding and repairing method, which is applied in the direction of metal material coating process, coating, etc., can solve the problem of poor processing performance of the repaired part of the fracture toughness repaired part of the bonding force between the clad layer and the substrate, welding clad layer and parts Weak bonding force of the substrate, limited use of the original design structure when changing the scale, etc., to achieve the effect of ensuring performance, reducing temperature gradient and stress-strain unevenness, and strong repairability
CN113802117AInactive Publication Date: 2021-12-17泰尔(安徽)工业科技服务有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
泰尔(安徽)工业科技服务有限公司
Publication Date
2021-12-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a laser cladding repairing method for an inner hole of a rolling mill roller end shaft sleeve. The laser cladding repairing method comprises the steps of shaft sleeve assembly disassembly, shaft sleeve surface cleaning, component detection, pre-sequence heat treatment, layered cladding, post-sequence heat treatment, machining, inspection and flaw detection and qualified product delivery. In the step (4) of pre-sequence heat treatment, specifically, preheating is carried out before cladding can be in-furnace heating and heating belt heating; or in-furnace heating and induction device heating are adopted; or the induction device is independently used for heating; and in the step of (6) post-sequence heat treatment, specifically, an induction heating mode can be induction heating or other heating modes. According to the laser cladding repairing method, a cladding layer with high wear resistance, high strength and high binding force is cladded on the surface of the inner hole of a roller end shaft, and the service life of the roller end shaft sleeve is prolonged.
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Description

Technical field

[0001] The present invention relates to the field of machining, and in particular, a repair method involving the inner bore in the roller end shaft sleeve. Background technique

[0002] The rolling roller end shaft is an important connector on the hot rolling production line of the steel. Its main function is to connect the working roller and transmit motor power to it, and achieve the rotation of the upper and lower working rolls to achieve continuous rolling. The rolling roller end shaft in the rolling process will be repeatedly extruded by the impact load, while the working roll and the roller roller end shaft sleeve are axially micro-friction, so that the rolling roller end shaft block is fast and the service life is short.

[0003] For the failure rolling roller end shaft, the traditional repair method is a modified utilization, welding repair and laser molten repair, which exists as the following problem: 1. Old part modulatory utilization is limited to part...

Claims

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