Abstract
Al-1 to 50 mass%Cu alloy billets were cast by the horizontal heated mold continuous casting method (OCC) developed by the authors. The surface condition, macrostructures and mechanical properties of the billets were examined and compared with those of the billets produced by a conventional method. The OCC billet has a flat mirror-like surface having the surface roughness value 1/10 of that of the usual billets. It is constituted macroscopically of an unidirectionally solidified single crystal seemingly and microscopically of aligned primary and eutectic phases. Mechanical properties of the OCC billet such as tensile strength, hardness and bending fatigue life are superior to those of conventional billets. Wrought products rolled, drawn and bent from the OCC billet are free from such defects as edge cracking, peeling and surface cracking.
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