A kind of metal coating and preparation method thereof
A metal coating, first-layer technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of material strength gap, limited improvement of coating/substrate interface bonding strength, etc., to improve bonding strength and improve protective performance. and service life, the effect of simple and convenient operation
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[0031] The present application proposes a method for preparing a metal coating, which is different from traditional coatings in the form of partial metallurgical bonding and simple mechanical engagement. Specifically, the method for preparing a metal coating provided by the present application includes the following steps: depositing on the surface of a substrate The first layer of the deposited layer is subjected to energy impact to cause the deformation of the first layer of the deposited layer and the base material, and an interfacial interlock structure is formed between the first layer of the deposited layer and the base.
[0032] That is, a first layer of deposition layer is first deposited on the surface of the substrate, and then the first layer of deposition layer is subjected to energy impact. Under the continuous bombardment of the external impact energy, the interface energy continues to accumulate, and the deformation is severe. The metals in the layer deposition l...
Embodiment 1
[0055] The present embodiment provides a method for preparing a metal coating with an interface interlocking structure, comprising the following steps:
[0056] Sandblast the surface of the aluminum substrate to remove the oxide film on the surface of the aluminum substrate. The surface of the substrate is cleaned with acetone to remove various contaminants such as oil and dust, so that the surface of the aluminum substrate is kept clean.
[0057] The substrate is fixed and protected with tape and tooling to ensure a stable coating deposition process.
[0058] The copper powder with an average particle size of 20.5 microns was sprayed onto the surface of the aluminum substrate by aerodynamic spraying to form the first deposition layer with a thickness of 10 microns. Then, laser shock strengthening is used to simultaneously impact the surface, so that the first layer of copper deposition layer and the surface of the aluminum substrate undergo continuous plastic deformation. Un...
Embodiment 2
[0062] The present embodiment provides a method for preparing a metal coating with an interface interlocking structure, comprising the following steps:
[0063] Perform mechanical grinding on the surface of the 45# steel substrate to remove the oxide film on the surface of the 45# steel substrate. Use alcohol to clean the surface of the substrate to remove various contaminants such as oil and dust, and keep the surface of the 45# steel substrate in a clean state.
[0064] The substrate is fixed and protected with tape and tooling to ensure a stable coating deposition process.
[0065] The aluminum bronze wire with a diameter of 2mm was sprayed onto the surface of the 45# steel substrate by the method of arc spraying to form the first deposition layer with a thickness of 50 microns. Then use laser shock strengthening to simultaneously shock the surface, so that the first layer of aluminum bronze deposition layer and the surface of the 45# steel substrate undergo continuous pla...
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Abstract
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