NiAl, Al/Cr2O3 thermal spray coating type self-bonding composite wire

       Ni-Al composite wire is a typical clad composite wire. It can be a nickel tube-coated aluminum core wire, or an aluminum tube-coated nickel-core wire, which has a faster exothermic reactivity.



When the nickel-aluminum composite wire is sprayed, a strong aluminothermic exothermic reaction occurs near the melting point temperature of aluminum (660~680℃) to form an intermetallic compound. Its reaction mechanism and coating properties are similar to those of nickel-aluminum composite powder spray coating. The nickel-aluminum composite wire has a wide adaptability to the changes of spraying process parameters. The oxygen content or oxide impurity content of the coating is lower than that of the nickel-aluminum composite powder spray coating, the deposition efficiency is high, and the operating cost is low. Wire Spray Better and more economical self-bonding spray wire.



The AI/Cr2O3 flux-cored tubular composite wire is a tube-shaped composite wire with a chromium oxide powder core covered with aluminum skin, and a strong aluminothermic exothermic reaction can also occur when thermal spraying is performed. The coating structure is a hard phase of uniform distribution of alumina particles in the metal chromium matrix phase, and the coating has the characteristics of heat resistance, corrosion resistance and wear resistance. In this typical cermet coating structure, the metal matrix phase plays the role of enhancing the bonding strength with the matrix material and bonding the ceramic particles into a dense coating. The ceramic particles play a supporting role in the wear-resistant hard phase. Heat-resistant, corrosion-resistant and wear-resistant coatings are prepared by spraying neutral flame wire for hot air pipes, boiler pipes, heat exchanger pipes, etc.