Effect of Die Temperature on Tensile Property of Rheocast Phosphor Bronze

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Abstract:

Semi-solid slurry of phosphor bronze with fine solid granules for rheocasting was tried to make by passing the low-superheat melt through an opening between a rotating regular octagonal rotor and a circumscribed chill block. The effect of rotational speed on the structure of a solidified small ingot was mainly investigated. The ingot structures were changed from the dendrite of rotor-free condition to the rosette at the rotational speed of 50rpm, and the granular with a mean size of about 50μm at higher than150rpm. The slurries made at 150rpm were rheocast to a cylindrical shape cavity within a die kept at different temperatures from 573 to 1173K by the use of a high pressure casting machine. Microstructures of rheocast cylindrical shape products were granular at the die temperatures lower than 773K and changed to grained one as like recrystallized at higher than 973K. Together with the microstructure change, poor tensile ductility less than 3% at the lowest die temperature was improved up to about 60% at 973K.

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Materials Science Forum (Volumes 706-709)

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931-936

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January 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] A. Kamio, in : Fundamental of Copper and Copper Alloy, and Industrial Technique, edited by Y. Murakami, Japan Copper and Brass association, Kodama Business Form Publishers Inc. (1994), p.605.

Google Scholar

[2] M. C. Flemings, R. G. Riek, K. P. Young : Materials Science and Engnineering, Vol. 25, (1976), p.103.

Google Scholar

[3] T. Kose, Y. Uetani, K. Nakajima, K. matsuda, S. Ikeno : Materials Science Forum Vol. 654-656, (2010), p.1389.

DOI: 10.4028/www.scientific.net/msf.654-656.1389

Google Scholar

[4] Y. Uetani, R. Nagata, H. Takagi, K. Matsuda and S. Ikeno : Materials Science Forum Vol. 561-565 (2007), p.291.

DOI: 10.4028/www.scientific.net/msf.561-565.291

Google Scholar

[5] Y. Uetani, H. Takagi, K. Matsuda and S. Ikeno : Proc. of the 11th Inter. Conf. on Aluminum Alloys, (2008), p.477.

Google Scholar

[6] M. C. Flemings : Metall. Trans. A, Vol. 22A (1991), p.957.

Google Scholar

[7] H. Kodama, K. Nagase, T. Umeda, M. Sugiyama : Journal of Japan Foundry Engineering Society Vol. 49, (1977), p.287 – 293.

Google Scholar