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A method for marking aluminum alloy corrosion-resistant two-dimensional codes based on laser cladding

A technology of laser cladding and aluminum alloy, which is applied in the field of laser marking to improve the corrosion resistance of DM codes on the surface of aluminum alloys. It can solve problems such as data loss, edge or module blur, DM code readability, etc. Improved salt spray corrosion resistance, pollution prevention, and improved salt spray corrosion resistance

Active Publication Date: 2018-04-17
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the purpose of improving the salt spray corrosion resistance of DM codes on the surface of aluminum alloy parts, it is necessary to solve the problem that the edges or modules of DM codes marked on the aluminum alloy surface are blurred after salt spray corrosion, and even part of the data in the code area is completely lost. Code readability and other issues, so that the DM code on the surface of aluminum alloy parts can be effectively protected, and the salt spray corrosion resistance of the DM code directly marked on the surface of aluminum alloy parts by laser can be improved

Method used

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  • A method for marking aluminum alloy corrosion-resistant two-dimensional codes based on laser cladding
  • A method for marking aluminum alloy corrosion-resistant two-dimensional codes based on laser cladding
  • A method for marking aluminum alloy corrosion-resistant two-dimensional codes based on laser cladding

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Effect test

Embodiment 1

[0059] In this embodiment, the aluminum alloy sheet material with the grade of 2A12 is selected as the aluminum alloy test piece to be marked, and its specification is Ф50*5mm.

[0060] The steps of this embodiment are:

[0061] Step 1: Prepare laser cladding coating:

[0062] Step 1.1: Mix nickel-based alloy powder (nickel-based alloy powder grade is Ni20) and graphite powder in a mass ratio of 20:1 and place them in a ball mill to fully mix; mix the obtained mixed powder with absolute ethanol and varnish according to the mass ratio 20:2:1 ratio and fully stirred and mixed to obtain the coating material.

[0063] Step 1.2: Coat the coating material evenly on the surface of the aluminum alloy test piece, and then place the aluminum alloy test piece in an electric blast drying oven to dry at a drying temperature of 100 degrees Celsius and a drying time of 60 minutes. Before coating the coating material, it is necessary to grind the surface of the aluminum alloy specimen so th...

Embodiment 2

[0086] In this embodiment, the aluminum alloy sheet material with the grade of 2A12 is selected as the aluminum alloy test piece to be marked, and its specification is Ф50*5mm.

[0087] The steps of this embodiment are:

[0088] Step 1: Prepare laser cladding coating:

[0089]Step 1.1: Mix nickel-based alloy powder (nickel-based alloy powder grade is Ni20) and graphite powder in a mass ratio of 20:1 and place them in a ball mill to fully mix; mix the obtained mixed powder with absolute ethanol and varnish according to the mass ratio 20:2:1 ratio and fully stirred and mixed to obtain the coating material.

[0090] Step 1.2: Coat the coating material evenly on the surface of the aluminum alloy test piece, and then place the aluminum alloy test piece in an electric blast drying oven to dry at a drying temperature of 100 degrees Celsius and a drying time of 60 minutes. Before coating the coating material, it is necessary to grind the surface of the aluminum alloy specimen so tha...

Embodiment 3

[0113] In this embodiment, the aluminum alloy sheet material with the grade of 2A12 is selected as the aluminum alloy test piece to be marked, and its specification is Ф50*5mm.

[0114] The steps of this embodiment are:

[0115] Step 1: Prepare laser cladding coating:

[0116] Step 1.1: Mix nickel-based alloy powder (nickel-based alloy powder grade is Ni20) and graphite powder in a mass ratio of 20:1 and place them in a ball mill to fully mix; mix the obtained mixed powder with absolute ethanol and varnish according to the mass ratio 20:2:1 ratio and fully stirred and mixed to obtain the coating material.

[0117] Step 1.2: Coat the coating material evenly on the surface of the aluminum alloy test piece, and then place the aluminum alloy test piece in an electric blast drying oven to dry at a drying temperature of 100 degrees Celsius and a drying time of 60 minutes. Before coating the coating material, it is necessary to grind the surface of the aluminum alloy specimen so th...

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Abstract

The present invention proposes a method for marking aluminum alloy corrosion-resistant two-dimensional codes based on laser cladding. The aluminum alloy substrate is evenly coated with a layer of nickel-based alloy powder, graphite powder, absolute ethanol and The coating material mixed with varnish is marked with DM code on the surface of the coating by laser to melt it and a thin layer on the surface of the substrate at the same time, and after rapid solidification, a surface coating with extremely low dilution and metallurgical bonding with the substrate is formed. Then use an ultrasonic cleaning machine to clean the unmarked part, so as to form a DM code mark that is resistant to salt spray corrosion. The salt spray corrosion resistance of the DM code mark produced by the invention is greatly improved, and has little influence on the part matrix outside the DM code mark area. Compared with other methods for improving the corrosion resistance of the DM code, the efficiency of the invention is also greatly improved.

Description

technical field [0001] The invention relates to the field of laser marking technology and laser surface modification technology, specifically a laser marking method based on laser cladding to improve the salt spray corrosion resistance of DM codes on the surface of aluminum alloys. The method can achieve marking The DM code on the aluminum alloy surface can still be read effectively after long-term salt spray corrosion. Background technique [0002] Practice has proved that laser direct marking technology and Data Matrix code (hereinafter referred to as DM code) technology can better solve the problem of product quality tracking. Laser direct marking technology produces permanent, high-contrast, high-quality marks on a variety of surfaces, such as metal, glass, ceramics or wood. Ensuring that a product has an effective unique identifier at any point in its life cycle is the key to realizing product life cycle management and information tracking. [0003] Parts often experi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
Inventor 岳婷何卫平李夏霜雷蕾张腾云黄玲
Owner NORTHWESTERN POLYTECHNICAL UNIV
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