Abstract: The invention relates to the manufacture of aluminum alloy blanks containing a large quantity of silicon and designed for extrusion by impact.It consists in applying the method of casting with oriented cooling in the main patent to a hypereutectic silicon aluminum alloy which has previously been refined with phosphorus.An even distribution of the remarkably fine primary silicon crystals is obtained in this way.The invention is particularly applicable to the manufacture of linings for heat engines made of aluminum alloys.

Abstract: The invention relates to blanks made of aluminum or aluminum base alloys for wiredrawing by impact, and to their method of obtaining same. These new blanks are obtained by casting and cooling under pressure, and are characterized by a fine and homogeneous grain, a crystalline structure with axial symmetry and an almost complete absence of pinholes, occlusions of a gaseous nature, and basaltic crystalline formations. They are intended for the fabrication by impact wiredrawing of such containers as tubes, carrying cases, boxes, packaging material, aerosol bombs, extinguisher bodies, bodies of bottles or cartridges for compressed or liquefied gases.