Preparation method of composite metal alloy coating layer and spraying equipment
A technology of composite metal and coating layer, applied in the field of surface engineering, can solve the problems of poor adhesion of stainless steel powder, easy falling off of coating, environmental pollution, etc., and achieve the effect of increasing practicability
Inactive Publication Date: 2019-03-15
深圳市金中瑞通讯技术有限公司
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The invention discloses a preparation method of a composite metal alloy coating layer and spraying equipment, and belongs to the technical field of surface engineering. The composite metal alloy coating layer comprises a first coating and a second coating which are connected with each other. The preparation method comprises the following three steps: (1) adopting a Cu alloy, an Al alloy or a Zn alloy as thermal spraying raw material powder, and spraying the thermal spraying raw material powder in the molten state onto the surface of a pretreated substrate at a first preset speed so as to formthe first coating; (2) baking stainless steel powder in an oven for 2 hours or longer so as to eliminate magnetism between the stainless steel powder; and (3) adopting the stainless steel powder subjected to magnetism elimination as cold spraying raw material powder, and spraying the cold spraying raw material powder onto the outer surface of the first coating at a second preset speed so as to form the second coating. Consequently, the stainless steel powder can be sprayed onto the substrate through cold and thermal spraying method by utilizing the step (1) to the step (3), and then the surface properties of the substrate can be improved.
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