Electrical Explosion Spraying Process

Electrical explosion spraying is a new preparation of the coating spray, spray with high speed, low oxidation rate, the conventional thermal spray techniques without the danger of gas needed, safety, quality and cheap, has a wide application prospects. Through research, the paper found the insulation, high hardness, and high-speed, high temperature molten particles do not adhere to spray chamber material-nylon; pneumatic clamping improve spray efficiency; with dust removal system, effectively eliminates dust.The paper influence of the factors explosion spraying, spraying with homemade exploding devices, through experiments that the voltage explosion spraying process and coating quality of the law:(1) electric explosion spraying, the spraying distance of the jet velocity and great influence on particle velocity, in order to prepare dense, high bonding strength of the coating, the workpiece placed on the need to spray at the maximum speed in the vicinity,80-100mm Office; (2) the spray area and spray distance of a linear relationship, with the spray number of unrelated; (3) With the increase in the number spraying, coating quality and thickness increased, coating and more compact, but the quality and the average thickness of the coating sprayed with linearly increasing frequency, but also increasingly coating The more rough and even cracked the experimental results, according to various different materials, generally 3 to 5 times suitable spray; (4) spray voltage selection should be based on the quality and characteristics of spray materials.Preparation of the requirements for wear 2Cr13 coating,65Mn corrosion-resistant coatings and for general environment of the 0Cr18Ni9Ti coating particles from the coating cross-section photographs were used, full grain deformation, low porosity and microcracks less alloying elements Burning less, combined with close and less oxidation. In order to solve the long-troubled gun barrel to rely on complex technology, high cost, short life chrome technology issues, electricity explosion spraying 7Cr13+B coating, FeCrBSi chrome layer coating and comparison test, the test for the relationship between gun barrel life The coating surface morphology, adhesion, erosion, and to reflect the hardness of wear. The results show that,7Cr13+B chrome coating and sex ratio, in addition to significant ablation performance, other performance than the chromium plating layer, the electric explosion spraying 7Cr13+B coating process to replace chrome barrel process, is more life, green, the ideal low-cost barrel coating technology. Applications, select solid material briquetting machine roller, the wear is mainly abrasion and require a high bonding strength, electrical explosion spraying wear-resistant materials, the actual work by running, roller life increase.