Properties Research on WC Coating on BT-20 by Detonation Gun Spraying
Though analysis on principle of DS and a lot of experiments, we point out that the structure of gun and distance of spraying and gas quantity have great effect on the quality of coating. On the base of lots of experiments, and confirm excellent processing parameters for coating.A contrast study was made on properties between detonation gun spraying (DS) and plasma spraying (PS)of coatings. It was found that hardness of coating by DS is bigger, biding intensity is higher,microstructure is symmetrical、compact and lower hole density,it has't macroscopic and microcosmic defect on the surface of coating/substrate,its oxidation resistance is evidently better,than coating by PS.