Laser restoring process for surface of high carbon alloy roller

A roll surface, laser repair technology, applied in metal material coating technology, laser welding equipment, metal processing equipment, etc., can solve the problems of easy cracks, reduced weldability, insufficient hardness, etc., and achieve small deformation of the roll and fusion The effect of high rate, uniform thickness and hardness

Inactive Publication Date: 2012-09-19
DANYANG HONGTU LASER TECH
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AI Technical Summary

Problems solved by technology

The current rolls are all made of new roll materials such as MC3 series and MC5 series. Due to the adjustment of the chemical composition of this type of steel, its overall mechanical properties and heat treatment performance have been greatly

Method used

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Embodiment Construction

[0014] The specific steps of the laser repair process for the surface of the high-carbon alloy roll of this embodiment are as follows:

[0015] A. Process the surface of the roll to be repaired, and perform failure analysis on the roll.

[0016] Remove dust, oil stains, rust, etc. on the roll; detect the size of each part of the roll to determine the failure location and its wear amount; perform radial and end face runout tests on the roll to check whether the roll is deformed; remove the failure portion of the roll by polishing The fatigue layer is 0.5mm and cleaned.

[0017] B. According to the failure analysis results of the roll, optimize the process parameters and perform laser cladding.

[0018] It adopts the preset powder feeding method, and uses the fast cross-flow carbon dioxide laser as the light source to perform continuous spiral feed overlap scanning on the roll. The laser power is 2000W, the elevation (the distance between the laser and the target, elevation = focal len...

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Abstract

The invention relates to a laser restoring process for the surface of a high carbon alloy roller. The laser restoring process comprises the following steps: (A) processing the surface of the roller, and carrying out failure analysis on the roller; (B) optimizing process parameters according to failure analysis results of the roller, and carrying out laser cladding; adopting a preset powder-feeding mode to enable a fast-transverse-flow carbon dioxide laser serving as a light source to carry out continuous screwfeed lap joint scanning on the roller; and enabling adopted alloy powder to comprise, by weight, no more than 0.15% of C, 12.5%-14.5% of Cr, 1.3%-1.8% of B, 0.5%-1.5% of Si, 0.5%-1.5% of Mo, and the balance Fe; and (C) performing detection. The laser restoring process for the surface of the high carbon alloy roller carries out laser cladding on the surface of the roller to enable the dimensions of the roller to meet the using requirements, a roller base body and a cladding layer are combined tightly, the thickness and the hardness of the cladding layer are uniform, and abrasion resistance of the roller can be enhanced.

Description

Technical field [0001] The invention relates to a laser cladding method, in particular to a laser cladding repair method on the surface of a roller. Background technique [0002] Since the 1990s, China's steel industry has developed rapidly. In 2006, it produced 423 million tons of steel, accounting for one-third of the world's steel output. In 2010, my country's steel output further increased to 627 million tons, a record high. In order to realize the rolling demand of high-grade steel products, the domestic high-end roll research and development process has been accelerated. A large number of imported rolls have been successfully developed in a short time and replaced imports, which greatly meets the development needs of the domestic steel industry. As an important tool in the steel rolling industry, rolls are the most important consumable part of steel rolling equipment. With the increase in steel production, roll consumption increases rapidly. Rough calculation, if we estima...

Claims

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Application Information

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IPC IPC(8): C23C24/10B23K26/34
Inventor 邓琦林刘少彬刘汉杰何建方
Owner DANYANG HONGTU LASER TECH
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