Process for grain refinement of aluminium casting alloys, in par

Details Process for grain refinement of aluminium casting alloys, in par Process for grain refinement of aluminium casting alloys, in par

1992-10-13

1993-10-05

Roy, Upendra

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

148548, C22C 100

Patent

active

052501256

ABSTRACT:
For the grain refinement of aluminum casting alloys, in particular aluminum/silicon casting alloys, gallium phosphide and/or indium phosphide are/is added to the melt, optionally in addition to further grain-refinement and/or modification additions. The addition of gallium phosphide and/or indium phosphide results in a good grain refinement with low shrink-hole tendency and does not have an adverse effect on modification processes.

REFERENCES:
patent: 1940922 (1933-12-01), Sterner-Rainer
patent: 3953202 (1976-04-01), Rasmussen
patent: 4113473 (1978-09-01), Gauvry et al.
patent: 5023051 (1991-06-01), Lindberg
Chemical Abstracts, vol. 81, No. 24, Abstract No. 157202, by Sap'yan et al., for Effect of Phosphides on the Structure and Properties of Hypereutectoid Silumins.
Zeitschrift Fur Metallkunde, Bd. 57, Nr. 5, May 5, 1966, for The Effect of Various Elements on the Modification of Al-Si Alloys, by S. T. Chiu.

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