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Aluminum alloy corrosion resistance two-dimensional code marking method based on laser cladding

A laser cladding, aluminum alloy technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of data loss, edge or module blur, DM code readability, etc., to improve the resistance to salt spray corrosion, The effect of avoiding pollution and improving the resistance to salt spray corrosion

Active Publication Date: 2015-08-19
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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  • Aluminum alloy corrosion resistance two-dimensional code marking method based on laser cladding
  • Aluminum alloy corrosion resistance two-dimensional code marking method based on laser cladding
  • Aluminum alloy corrosion resistance two-dimensional code marking method based on laser cladding

Examples

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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 invention provides an aluminum alloy corrosion resistance two-dimensional code marking method based on laser cladding. According to the method, a preset powder method is adopted for uniformly coating a layer of coating material on an aluminum alloy substrate; the coating material is formed by mixing nickel-based alloy powder, graphite powder, absolute ethyl alcohol and lacquer varnish; DM (digital matrix) codes are marked on the surface of the coating layer through laser so that the coating layer and a thin layer of the surface of the substrate are simultaneously melted, and a surface coating which has ultra-low dilution degree and forms metallurgical bonding with the substrate is formed after fast solidification; then, an ultrasonic cleaner is used for cleaning away unmarked parts, so that a DM code mark realizing salt spray corrosion resistance is formed. The salt spray corrosion resistance performance of the generated DM code mark is greatly improved, and in addition, the influence on part substrates outside the DM code mark region is smaller. Compared with other methods for improving the corrosion resistance of the DM code, the aluminum alloy corrosion resistance two-dimensional code marking method has the advantage that the efficiency is 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 Applications(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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