High-wear-resistant conductive strong-bonding coating and preparation method thereof

A high wear-resistant, coating technology, applied in the direction of coating, metal material coating process, etc.

Inactive Publication Date: 2020-02-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a highly wear-resistant and conductive strong-bonding coating and a preparation method thereof, aiming at solving the problem of metallurgical bonding between a layer prepared on the surface of a copper or aluminum substrate and the substrate with high bonding strength, high surface wear resistance and electrical conductivity. The problem of nickel-silver alloy coating with good performance can prolong the service life of conductive materials such as copper and aluminum. The nickel-silver alloy coating prepared by this preparation process has no cracks and a wide range of thickness control. In the case of metallurgical integration, efficient green processing, zero toxic and harmful emissions and high material utilization can be achieved in the production process

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  • High-wear-resistant conductive strong-bonding coating and preparation method thereof
  • High-wear-resistant conductive strong-bonding coating and preparation method thereof
  • High-wear-resistant conductive strong-bonding coating and preparation method thereof

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Embodiment 1

[0035]Embodiment 1 of the present invention provides a highly wear-resistant and electrically conductive strong bonding coating, specifically providing a nickel-silver alloy coating formed on the surface of a copper and / or aluminum substrate by metallurgical bonding, which includes forming on copper and / or aluminum Or the transition layer on the surface of the aluminum substrate, the nickel-silver alloy layer formed on the surface of the transition layer, the copper and / or aluminum substrate, the transition layer, and the nickel-silver alloy layer are all metallurgical bonds, wherein the material of the transition layer is pure Ni metal , at least one of pure Cr metal, NiCr or MCrAlY alloy, M represents Ni, Co or NiCo, and the material of the high wear-resistant nickel-silver alloy layer includes pure nickel and pure Silver powder, the ratio of the thickness of the transition layer to the thickness of the high wear-resistant nickel-silver alloy layer is 2:1-1:3. When the ratio...

Embodiment 2

[0041] Embodiment 2 of the present invention provides a method for preparing a highly wear-resistant and conductive strong bonding coating on the surface of a copper and / or aluminum substrate, the method comprising:

[0042] Step 1: Pretreat and preheat the surface of the copper and / or aluminum substrate. The pretreatment includes at least degreasing and sandblasting the surface of the copper and / or aluminum substrate. The preheating temperature is 40°C to 300°C. The preheating time is 30 minutes to 120 minutes;

[0043] Step 2: Prepare a transition layer on the surface of the copper and / or aluminum substrate by using a coaxial powder feeding device with laser cladding technology, the material of the transition layer is at least one of pure Ni metal, pure Cr metal, NiCr or MCrAlY alloy Type, M represents Ni, Co or NiCo, and the transition layer is metallurgically bonded to the copper and / or aluminum substrate;

[0044] Specifically, a transition layer is prepared on the surfa...

Embodiment 3

[0052] Embodiment 3 of the present invention provides a comparative test analysis result of the highly wear-resistant and conductive strong-bonding coating of the above-mentioned embodiment 1 prepared by using the different preparation processes of the above-mentioned embodiment 2, wherein, specifically, it is chromium-zirconium copper with a thickness of 20mm The wear-resistant conductive coating was prepared by laser cladding nickel-silver alloy powder with different process parameters on the surface of the substrate. The equipment used in the preparation process includes: a 6-axis robot system, a 4KW fiber laser, a core diameter of 100 μm, and a laser cladding powder feeder (the coaxial powder feeder is the powder feeding part of the laser cladding powder feeder). The specific preparation process parameters adopted by sample 1, sample 2 and sample 3 are shown in Table 1 below:

[0053] Table 1: Different process parameters used for different samples

[0054]

[0055] Ne...

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Abstract

The invention discloses a high-wear-resistant conductive strong-bonding coating and a preparation method thereof, and belongs to the technical field of surface engineering. According to the coating and the preparation method thereof, a transition layer is creatively arranged between the surface of a copper and / or aluminum substrate and a nickel-silver alloy layer in a metallurgical bonding mode, the transition layer has the effects of improving the laser absorptivity, reducing the thermal conductivity of the substrate and decreasing the dilution rate, perfect bonding between the transition layer and the high-wear-resistant nickel-silver alloy layer can be guaranteed, formation of the high-wear-resistant coating and a coating product which are free of surface cracks and are metallurgicallybonded on the surface of the copper and / or aluminum substrate is improved, the problem that a layer of nickel-silver alloy coating which is metallurgically bonded with the the substrate and has high bonding strength, high surface wear resistance and good conductivity is prepared on the surface of a copper or aluminum substrate can be solved, the service life of conductive materials such as copperand aluminum is prolonged, and it is guaranteed that under the condition that the nickel-silver alloy coating and the substrate are metallurgically bonded, efficient green processing, zero emission oftoxic and harmful substances and high material utilization rate can be realized in the production process.

Description

[0001] This application claims the priority of the Chinese patent application submitted to the China Patent Office on April 23, 2019, the application number is 201910326209.X, and the title of the invention is "a method for preparing a wear-resistant coating on copper metal and copper alloy substrates" , the entire contents of which are incorporated in this application by reference. technical field [0002] The invention relates to the technical field of surface engineering, in particular to a highly wear-resistant and conductive strong bonding coating and a preparation method thereof. Background technique [0003] Copper is widely used in industry as a good conductor, but as an electrical contact material, it is prone to wear, arcing, welding and other behaviors that cause material failure. Using nickel-silver alloy coating to modify the surface of copper substrate is an effective way. On the one hand, under the premise of ensuring the performance, it saves the use of preci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/106
Inventor 王豫跃牛强齐振佳杨冠军李长久
Owner XI AN JIAOTONG UNIV
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