METHOD AND AN APPARATUS FOR MANUFACTURING METALLIC COMPOSITE MATERIAL BARS BY UNIDIRECTIONAL SOLIDIFICATION

摘要

File 694 P/9 CA A METHOD AND AN APPARATUS FOR MANUFACTURING METALLIC COMPOSITE MATERIAL BARS BY UNIDIRECTIONAL SOLIDIFICATION Disclosed are method and apparatus for manufacturing bars made of an alloy by unidirectional solidification. The mold is moved relative to a hot source and a cold source disposed below the hot source, the relative positions of the two sources as well as their efficiency and the displacement speed of the mold being set so that is established within the alloy contained in the mold a planar solidification front with a high thermal gradient at the level of said front, and so that there is produced an orientation of the structure of the alloy which is perpendicular to the solidification front, and, during the whole duration of the solidification, the mold is fed with alloy powder having the required nominal composition at the rate corresponding to the quantity of alloy solidified by unit of time. Fig. 1.