Abstract
Many alloys are difficult to manipulate by the hot-working of a cast ingot because the cast structure contains segregated areas of hard, brittle phases. The breakdown of such a cast structure into a uniform distribution of phases involves a lengthy and careful thermal working cycle. It is suggested this problem might be overcome and superior structures obtained by the consolidation of atomized prealloyed powders; such powders are necessarily free of macro-segregation. Hot extrusion of a compacted billet is confirmed as a valid technique. This paper describes experiments undertaken to assess the feasibility of the process. Initially, simple metals and alloys were investigated with a view to determining the extrusion parameters and the general quality of the extruded product. Later, more difficult materials were investigated. The properties of a number of materials extruded from powders are given. It is shown that a very fine and uniform distribution of phases can be obtained by this method, which in some cases gives superior properties.
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References
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© 1966 Metal Powder Industries Federation and The Metallurgical Society of AIME
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Shakespeare, C.R., Oliver, D.A. (1966). Some Characteristics of Hot-Extruded Powder Metal Billets. In: Hausner, H.H. (eds) Modern Developments in Powder Metallurgy. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-7706-1_13
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DOI: https://doi.org/10.1007/978-1-4684-7706-1_13
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-7708-5
Online ISBN: 978-1-4684-7706-1
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