Method of wire explosion spraying executed directly by powder material

Abstract

The method of discharge-induced explosion directly by powder material designed in the invention comprises: attaching powder material to metal explosion material; causing high density electric energy to discharge to the conductive metal explosion material in heavy impacting current mode by a charging capacitor to cause the metal explosion material together with the powder material to melt, explode,form mixed particle jet flow, and jet to a base to form coating. The obtained metal-base composite material coating is composed by metal and powder materials with bonding effect, instead of the conventional layered structure composed by different materials; has the advantages of compact, fine particles, low voidage, high bonding strength, and almost no delaminate wear appearing in the wearing process. The powder material on the metal explosion material is generally hard particles which increases the coating wear resistance; and the metal base body coated by the metal explosion material is relatively soft, can bear a certain degree of plastic deformation, and achieves a better 'soft base + hard phase' characteristic combined with hard particles.

Description

technical field [0001] The invention relates to a spraying method, in particular to an electric explosion spraying method. Background technique [0002] The electric explosion spraying in the prior art has the following advantages: 1. The bonding strength of the sprayed layer is high, the porosity is low, and the coating structure is not a traditional layered structure, but a whole. 2. For the coating with the same composition, the hardness of the coating formed by explosive spraying is higher than that formed by other methods. 3. The spraying process is completed in an instant, even if it is carried out in the atmosphere, the oxidation of the coating is very little. However, due to the limitation of the method of electric detonation spraying, the prerequisite for detonation spraying is that the explosive material must be a conductive material, and it must be a material that can be made into a sheet or filament, which limits the application of detonation spraying. Some non...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the method of electric detonation spraying, the prerequisite for detonation spraying is that the explosive material must be a conductive material, and it must be a material that can be made into a sheet or wire shape, which limits the application of detonation spraying. Makes some non-conductive materials unable to be sprayed by electro-explosion spraying

At the same time, due to the limitation of the material characteristics of the metal itself, the metal electric explosive material has poor performance in terms of wear resistance and erosion resistance.

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