Abstract
In the present paper the mathematical simulation of the formation of the structure of both the substrate and the coating during high velocity oxyfuel (HVOF) spraying is presented. The variation in the solidification velocity, the thermal gradient, and the cooling velocity in the first coating layer as well as the fusion (solidification) velocity, the thermal gradient, and the heating (cooling) velocity in the substrate are studied. The formation of the amorphous structure in the coating and the crystalline structure in the substrate are discussed. The optimal conditions for the development of the fine and dense crystalline structure in the substrate are investigated. The results obtained agree well with the experimental data.MST/3041
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