Laser cladding preparation method of ceramic reinforced metal base composite coating

Abstract

The invention provides a laser cladding preparation method of a ceramic reinforced metal base composite coating. The laser cladding preparation method of the ceramic reinforced metal base composite coating comprises the following steps that the step 1, a metal substrate is prepared; the step 2, alloy auxiliary lasers are utilized to melt metal powder on the surface of the metal substrate so as toform a metal cladding layer; and the step 3, the metal cladding layer is molten, and ceramic powder is injected into the metal cladding layer. Compared with the prior art, the laser cladding preparation method of the ceramic reinforced metal base composite coating has the following advantages that the phenomenon that ceramic particles are molten and decomposed due to the fact that the ceramic particles are directly irradiated and heated by laser beams is avoided, a large number of ceramic particles can be reserved in the primitive form and uniformly distributed on the coating, the high hardness, wear resistance and corrosion resistance features of ceramic materials are given full play to, the reinforcement effect of the coating is improved, and the mechanical property of the coating is improved. In conclusion, the prepared ceramic reinforced metal base composite coating is good in performance, and the defects of the technology and the performance of metal base ceramic coating preparation according to a conventional laser method are effectively overcome.

Description

technical field [0001] The invention belongs to the technical field of laser surface engineering, and more specifically relates to a laser cladding preparation method of a ceramic-reinforced metal-based composite coating. Background technique [0002] The preparation of ceramic-reinforced metal-based composite coatings by laser cladding is a new type of surface strengthening modification technology, which can combine the excellent strength, toughness and good process performance of metal materials with the high melting point, high hardness and high wear resistance of ceramic materials. Combining the characteristics of corrosion resistance and corrosion resistance, it overcomes the shortcomings of metal and ceramic materials, such as insufficient performance when used alone, and poor process performance of the latter. In order to add ceramic particles to laser cladding, two methods are mainly used in the actual process. One is to pre-mix metal and ceramic powders by mechanica...

AI Technical Summary

Problems solved by technology

[0002] The preparation of ceramic-reinforced metal-based composite coatings by laser cladding is a new type of surface strengthening modification technology, which can combine the excellent strength, toughness and good process performance of metal materials with the high melting point, high hardness and high wear resistance of ceramic materials. Combining the characteristics of corrosion resistance and corrosion resistance, it overcomes the shortcomings of insufficient performance of metal and ceramic materials when used alone, and poor process performance of the latter.

In order to add ceramic particles to laser cladding, two methods are mainly used in the actual process. One is to pre-mix metal and ceramic powders by mechanical means, and the other is to wrap metal powder on the surface of ceramic particles. Which method is used, the ceramic particles will inevitably be heated by laser radiation during the actual laser cladding process, which will cause part of the ceramic material to melt and decompose under high temperature, thus losing the strengthening effect and aggravating the cracking of the coating tendency

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