Preparing Semisolid Light Alloys by Vibrating Wavelike Sloping Plate Process and Thixoforming

Abstract:

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By using self-made vibrating wavelike sloping plate setup, semisolid billets with fine spherical or rosette grains have be prepared by semi-continuous casting, and the solidified shell on the sloping plate surface can be effectively avoided. Burst nucleation in the whole melt and dendrite fracture causes the formation of fine spherical microstructures. Under the current experimental conditions, proper casting temperature ranges of 660°C~680°C and the amplitude value of under 2mm proper are suggested. When the reheating temperature is 575°C and the holding time is 60min for AZ91D alloy, 597°C and 90min for Al-6Si-2Mg (wt-%) alloy, semisolid forging process can be successfully implemented. Thixo-forming products of two alloys are fine with smooth appearance, good microstructures and properties.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

865-868

DOI:

10.4028/www.scientific.net/MSF.561-565.865

Citation:

R. G. Guan et al., "Preparing Semisolid Light Alloys by Vibrating Wavelike Sloping Plate Process and Thixoforming", Materials Science Forum, Vols. 561-565, pp. 865-868, 2007

Online since:

October 2007

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Price:

$35.00

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