What are self-fluxing alloys? What are the characteristics?

       The so-called self-fluxing alloy, also referred to as self-fluxing alloy, refers to a type of alloy with a low melting point, which can self-deoxidize and form slag during the melting process, and can "wet" the surface of the substrate to form a metallurgical bond. After the alloy is solidified, a dispersion-strengthening phase with high hardness can be formed in the solid solution, which improves the strength and hardness of the alloy. At present, most self-fluxing alloys are made by adding appropriate amount of B and Si elements to iron-based, nickel-based and cobalt-based alloys. B. The addition of Si enables the coating to be reheated to a high temperature above 1000 degrees Celsius after it is formed to reach a molten state. While generating a strong metallurgical bond with the substrate, the pores in the coating can be eliminated, and the spraying material can be fully utilized. Superior performance.

     The remelting of the coating can be carried out by flame heating, high-frequency induction heating, or heating in a vacuum furnace. It should be noted that because the heating temperature exceeds 1000 degrees Celsius, deformation and changes in the matrix structure will inevitably occur. .