MOLDING OF SLURRY-FORM SEMI-SOLIDIFIED METAL

摘要

Molding of slurry-form semi-solidified metal, comprising the step of providi ng a map showing, by metal components, the correlation between solid phase rati o and viscosity with respect to slurry-form semi-solidified metal (27); the st ep of setting up target viscosity corresponding to target solid phase ratio wit h the use of the map; the viscosity measuring step of while cooling semi- solidified metal placed in container (13), measuring the viscosity thereof; and the step of continuing cooling until the viscosity reaches the target viscosity, wherein the group of these steps are accomplished between providi ng of a map showing the correlation between solid phase ratio and viscosity wit h respect to semi-solidified metal and completion of cooling of the semi- solidified metal to thereby cause the solid phase ratio of the semi-solidifi ed metal to agree with the target solid phase ratio. The viscosity is detected to thereby enable avoiding of the influence of cooling rate variation and time, so that as compared with the conventional supervision on the basis of time, the precision of control of solid phase ratio of semi-solidified metal can b e enhanced strikingly.