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Method for preparing wear resistant coating on bar material KOCKS sizing mill clamping chuck surface through laser cladding

A laser cladding and wear-resistant coating technology, applied in metal material coating process, coating and other directions, can solve problems such as affecting normal production, large deformation, aggravating chuck wear, etc., to achieve strong resistance to intermetallic scratches , improve the service life, the effect of low comprehensive cost

Inactive Publication Date: 2014-12-31
SHENYANG DALU LASER COMPLETE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the production and assembly process, due to the contact and loading and unloading of the chuck with high-hardness cemented carbide and high-speed steel roller rings, the chuck stopper and the disc surface are worn, and the assembly gap is too large to affect normal work, especially after the wear is out of tolerance due to tightness Insufficient results in relative slippage between the roller ring and the disk surface during the rolling process, which aggravates the wear of the chuck and affects normal production
[0004] When the traditional repair and manufacture of the worn part of the chuck is adopted, due to the large deformation caused by the large thermal stress of arc surfacing welding, and the poor bonding force of spraying and electroplating, the above-mentioned process cannot be effectively implemented

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The process of preparing wear-resistant coating by laser cladding on the chuck surface of bar KOCKS sizing machine includes the following process.

[0032] 1. Preparation of transition layer laser cladding materials.

[0033] A. Nickel-based A alloy powder is, and its chemical composition is.

[0034] Carbon 0.05-0.3% Silicon 2-4% Boron 1-3% Chromium 0-8% Iron 0-8% The rest is nickel.

[0035] B, cobalt-based B alloy powder, its chemical composition is.

[0036] Carbon 0.25% Silicon 0.9% Chromium 27.0% Molybdenum 5.5% Iron 0-8% The rest is cobalt.

[0037] C. Powder ratio.

[0038] The weight ratio of the above two alloys A and B is 4:1.

[0039] Prepare on an electronic balance according to the above-mentioned materials and proportioning range, and mix in a special mixer for more than 4 hours.

[0040] 2. Machining and surface cleaning of the working layer.

[0041] The purpose of mechanical processing is to reserve the thickness of the working layer required for...

Embodiment 2

[0053] The process of preparing wear-resistant coating by laser cladding on the chuck surface of bar KOCKS sizing machine includes the following process.

[0054] 1. Preparation of transition layer laser cladding materials.

[0055] a) Nickel base A alloy powder, its chemical composition is.

[0056] Carbon 0.05-0.3% Silicon 2-4% Boron 1-3% Chromium 0-8% Iron 0-8% The rest is nickel.

[0057] B, cobalt-based B alloy powder, its chemical composition is.

[0058] Carbon 0.25% Silicon 0.9% Chromium 27.0% Molybdenum 5.5% Iron 0-8% The rest is cobalt.

[0059] C. Powder ratio.

[0060] The weight ratio of the above two alloys A and B is 4:1.

[0061] Prepare on an electronic balance according to the above-mentioned materials and proportioning range, and mix in a special mixer for more than 4 hours.

[0062] 2. Machining and surface cleaning of the working layer.

[0063] The purpose of mechanical processing is to reserve the thickness of the working layer required for laser ...

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Abstract

The invention relates to a method for preparing a wear resistant coating on a bar material KOCKS sizing mill clamping chuck surface through laser cladding, which comprises the following steps: 1)preparing a transition layer laser cladding material, preparing A)nickel-based alloy powder and B)cobalt-based alloy powder on an electronic balance with weight proportion of 3-5: 1, mixing for more than 4 hours by a special-purpose meal mixer; 2)machining and cleaning surface of a work layer, removing oil stain by a solvent or a cleaning compound, removing a rust layer by polishing or sand blasting; and 3)performing laser cladding, selecting the prepared and mixed transition layer powder and work layer powder, adjusting the powder feeding rate of an automatic powder feeding apparatus, and then satisfying the powder feeding rate required by the coating thickness. The cobalt-based hard alloy coating which has thickness of 0.5--3mm and has characteristics of high hardness, thermal wear resistance, and strong intermetallic scratch capability resistance is formed on the surface of a matrix, so that bar material KOCKS sizing mill clamping chuck front edge and chuck surface usage life can be increased.

Description

technical field [0001] The invention relates to a method for repairing metallurgical equipment components using laser cladding technology, in particular to a method for preparing a wear-resistant coating by laser cladding on the chuck surface of a bar KOCKS sizing machine, and belongs to the technical field of laser cladding. Background technique [0002] The KOCKS three-roller sizing machine for bar material has a 120° angle between the three rollers, so that the deformation is more uniform, and more accurate dimensional tolerances and good surface quality can be obtained; the use of spare racks to change rollers can increase the effective working time and improve the finished product. Rate. Due to the high rolling precision and good surface quality, which can reduce the cost of subsequent processes, it is often used in the production of special steel with high added value. [0003] The chuck assembly of KOCKS three-roller sizing machine is its core component. During the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05C22C19/03C22C19/07
Inventor 赵越陈海涛张威
Owner SHENYANG DALU LASER COMPLETE EQUIP