Coating technology: Construction Technology of thermal spraying ceramic nano materials

Core tip: the common thermal spraying nano material is cermet composite powder, which is a kind of important coating material made of metal or alloy as the bonding phase, ceramic particles as the strengthening hard phase, and processed by sintering, agglomeration, coating and other processes It can be divided into the following three categories: 1 Nickel based alumina Ni based alumina, α - Al2O3 particles as the main material, Ni as the auxiliary material, the coating formed has high bonding strength with the base metal, the coating is compact, usually as the middle layer, which can effectively resist the corrosion of the workpiece under the working conditions 2 Nickel based tungsten carbide Tungsten carbide, based on nickel Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Coating home news: the common thermal spraying nano materials are cermet composite powder, which is a kind of important coating materials made of metal or alloy as the bonding phase, ceramic particles as the strengthening hard phase, and processed by sintering, agglomeration, coating and other processes It can be divided into the following three categories: 1 Nickel based alumina Ni based alumina, α - Al2O3 particles as the main material, Ni as the auxiliary material, the coating formed has high bonding strength with the base metal, the coating is compact, usually as the middle layer, which can effectively resist the corrosion of the workpiece under the working conditions 2 Nickel based tungsten carbide Nickel based tungsten carbide is a composite powder made of hard WC as the main material and Ni as the auxiliary material It is a high hardness material Ni60wc powder is selected The combination strength of the material and the matrix is high WC particles can strengthen the Ni60 composite coating The bone pain strengthening effect of γ - Ni solid melt and the dispersion strengthening effect of a large number of fine carbide hard phases can greatly strengthen the hardness of the coating matrix and effectively resist the work Wear under conditions 3 Nickel base chromium In ni-cr2c3, the content of NiCr is about 25%, the melting point is 1400 ℃, and the temperature is below 900 ℃, which has superior erosion resistance, corrosion resistance and wear resistance NiCr has good heat and corrosion resistance, while chromium carbide has the strongest oxidation resistance in metal carbides Only at 1100-1400 ℃ can it start to oxidize significantly, and it can also maintain high hardness at high temperature It also has strong corrosion resistance and wear resistance Among the three materials, nickel base chromium is the most ideal material because of its high service temperature, strong wear resistance and corrosion resistance The general process of thermal spraying is: 1 The spraying material is heated and melted 2 The melted material is atomized by hot air flow, further accelerating the formation of particle flow, and the melted particles interact with the surrounding medium 3 Particles collide, deform, solidify and pile up on the surface of matrix Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,