According to the order of powder spraying and remelting, the oxygen-acetylene flame powder spray melting process can be divided into "one-step method" and "two-step method", "one-step method" spray melting process includes: workpiece surface preparation, preheating, preheating Powder spraying, spray melting, cooling and post-processing of spray melting layer, that is, spraying and melting alternately. The "two-step" spray melting process is the workpiece surface preparation, preheating, powder spraying, remelting, cooling and post-processing of the spray melting layer, that is, the powder is sprayed on the workpiece and then remelted.
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