Continuous casting method and ingot produced thereby

Details Continuous casting method and ingot produced thereby Continuous casting method and ingot produced thereby

B - Operations, Transporting

22

D

22/167

B22D 7/00 (2006.01) B22D 11/11 (2006.01) B22D 11/124 (2006.01)

Patent

CA 1227319

CONTINUOUS CASTING METHOD AND INGOT PRODUCED THEREBY ABSTRACT A method is described for continuously casting an ingot of a metal alloy of a type having a substantial liquidus-solidus temperature range to produce internal microstructure of a desired fineness. Molten alloy is flowed along an electron beam heated skulled hearth while controlling the electron beam to maintain a solids content in the alloy on the hearth of between about 15% and about 40%. The alloy is poured from the hearth into the top of a continuous casting mold at a rate which produces a thixotropic region at the upper end of the fully solidified alloy in the mold. The ingot produced is characterized by a macrostructure in excess of one millimeter average grain dimensions with a non-uniform shape, orientation, and distribution, and is characterized by a microstructure of the order of fifty micron cell spacing of dendritic crystallites comprising the microstructure.

491803

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