Abstract
Metal spray forming, sometimes called spray casting or spray deposition, can be traced back to as early as 1910 and has been used for the production of shapes such as billets, tubes, or “near net shapes”, for various alloys. It is an alternative to conventional methods, including casting (see Section 7.1), ingot metallurgy, electrode remelting processes and powder metallurgy. The process involves spraying the molten metallic particles onto a previously prepared base material to form a coating, which is normally in a controlled atmosphere in a spray chamber and often with an inert gas such as nitrogen. The science behind this technology with its wide industrial applicability is still under investigation and the implementation of full production has not yet proved to be economically viable as a substitute for conventional methods. The application of the science and technology of sprays and atomization plays a pivotal role in the deposition of molten materials in spray forming, and this is reflected in the final product quality. In this section the various process applications of spray forming are briefly described, the principal concern being the properties of the sprays and nozzle (or atomizer) designs. Measurement techniques together with problems and future challenges involved in this fast moving new metal manufacturing technology are also described.
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Nasr, G.G., Yule, A.J., Bendig, L. (2002). Spraying Molten Metals. In: Industrial Sprays and Atomization. Springer, London. https://doi.org/10.1007/978-1-4471-3816-7_8
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DOI: https://doi.org/10.1007/978-1-4471-3816-7_8
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