Evolution of the Top Surface Temperature of Spray Formed Billet

摘要

The top surface temperature is a suitable control parameter in the spray forming process, as it strongly influences the particle sticking efficiency and therefore the process yield. This paper presents the numerical analysis of the evolution of the top surface temperature of a spray forming billet by calculating a three-dimensional time-dependent growing shape model and a thermal model for the deposition process. Different time scales are applied for the bulk deposit and surface layer in order to illustrate the temperature profile on the top surface of the billet. The surface temperature from numerical calculations is compared with experimental results measured by pyrometry whin spray deposition of CuSn6 alloy billets.