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Coating material replacing hard chromium plating and method for carrying out laser cladding by using coating material

A coating material and laser cladding technology, applied in the field of repair, can solve problems such as prone to bubbles, low density, and shedding, and achieve the effect of small heat-affected zone, low difficulty and cost, and tight cladding layer

Inactive Publication Date: 2017-10-20
WUXI ZHOUXIANG LASER MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional chromium electroplating technology is a surface treatment technology that deposits chromium on the surface of the substrate by electrolytic process to form a chromium coating. There is a physical combination between the coating and the substrate, but the density of this combination is not high, and it is prone to bubbles, cracks, fall off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A coating material that replaces hard chromium plating, the formula ratio is as follows by weight percentage: the coating material includes 15% Cr, 3% Ni, 3% impurities, and the rest is Fe; Chrome coating material.

[0020] The mesh number of the coating metal powder is 100 mesh.

[0021] The laser cladding replaces the traditional method of hard chrome plating, and the steps are as follows:

[0022] (1) Cleaning: After ensuring that there is no oxide on the surface of one side of the workpiece, wipe the surface of the workpiece with industrial ethanol to clean up the oil;

[0023] (2) Laser output: IPG optical fiber continuous output equipment is used for laser output, the power is controlled at 2200W, the positive defocus is 5mm, the spot diameter is 3mm, and the linear speed is 600mm / min to scan the workpiece;

[0024] (3) Cladding: adopt air-borne powder feeding method to feed powder synchronously, and the metal powder enters the molten pool at a speed of 15g / min;...

Embodiment 2

[0029] A coating material that replaces hard chromium plating, the formula ratio is as follows in weight percentage: the coating material includes C 0.5%, Cr 18%, Ni 5%, impurities 3%, and the rest is Fe; Get a coating material that replaces hard chrome plating.

[0030] The mesh number of the coating metal powder is 270 mesh.

[0031] The laser cladding replaces the traditional method of hard chrome plating, and the steps are as follows:

[0032] (1) Cleaning: After ensuring that there is no oxide on the surface of one side of the workpiece, wipe the surface of the workpiece with industrial ethanol to clean up the oil;

[0033] (2) Laser output: IPG optical fiber continuous output equipment is used for laser output, the power is controlled at 2800W, the positive defocus is 10mm, the spot diameter is 5mm, and the linear speed is 900mm / min to scan the workpiece;

[0034] (3) Cladding: adopt air-borne powder feeding method to feed powder synchronously, and the metal powder ent...

Embodiment 3

[0039] A coating material that replaces hard chromium plating, the formula ratio is as follows in weight percentage: the coating material includes C 0.3%, Cr 16%, Ni 4%, impurities 2%, and the rest is Fe; Get a coating material that replaces hard chrome plating.

[0040] The mesh number of the coating metal powder is 200 mesh.

[0041] The laser cladding replaces the traditional method of hard chrome plating, and the steps are as follows:

[0042] (1) Cleaning: After ensuring that there is no oxide on the surface of one side of the workpiece, wipe the surface of the workpiece with industrial ethanol to clean up the oil;

[0043] (2) Laser output: IPG optical fiber continuous output equipment is used for laser output, the power is controlled at 1500W, the positive defocus is 7mm, the spot diameter is 4mm, and the linear speed is 750mm / min to scan the workpiece;

[0044] (3) Cladding: adopt air-borne powder feeding method to feed powder synchronously, and the metal powder ente...

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PUM

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Abstract

The invention relates to a coating material replacing hard chromium plating and a method for carrying out laser cladding by using the coating material, and belongs to the technical field of restoration. The coating material comprises C, Cr, Ni, impurities and Fe. The method comprises the steps that elemental metal is atomized to obtain the coating material for replacing the hard chromium plating, and a final finished workpiece is obtained through cleaning, laser outputting, cladding and post-treatment. According to the coating material and the method, the laser cladding technology is adopted, a uniform and dense metal coating is formed on the surface of a substrate, and therefore the generation of pore cracks is completely avoided, and the contact between water and the substrate is completely obstructed.

Description

technical field [0001] The invention relates to a coating material for replacing hard chromium plating and a laser cladding method thereof, belonging to the technical field of restoration. Background technique [0002] The traditional chromium electroplating technology is a surface treatment technology that deposits chromium on the surface of the substrate by electrolytic process to form a chromium coating. There is a physical combination between the coating and the substrate, but the density of this combination is not high, and it is prone to bubbles, cracks, fall off. [0003] Chromium plating is highly wear-resistant due to its high hardness, but it is only protective if the coating is dense and non-porous. Strength is the fatal point of chromium plating. Therefore, if there are pores and cracks due to the process, the chromium layer is more brittle because of its high hardness. When it is locally compressed or impacted, the chromium layer is prone to cracks. Contents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/40
CPCC23C24/103C22C38/40C23C24/106
Inventor 徐旦余致政
Owner WUXI ZHOUXIANG LASER MACHINERY
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