Abstract: This invention is concerned with the production of directionally solidified castings or ingots to eliminate casting defects such as macrosegregation and misoriented grain defects that occur in the blades for jet engines and industrial gas turbines. The mechanism of the occurrence of the above casting defects was clarified by the computer simulation system developed by this inventor, and it was found that, by strongly cooling the solid phase region and applying an axial static magnetic field, the heat pulses at the solidification interface due to convection of the liquid phase can be suppressed, and harmful lateral liquid flow in the solid-liquid coexisting phase can be suppressed by the synergistic effect of these two measures. This eliminates casting defects such as macrosegregation and misoriented grain defects, also refines the microstructure to produce high-quality products with excellent mechanical properties (creep strength).

Abstract: Method and apparatus for continuous casting, especially casting of steel that can easily provide high quality steel that has no central segregation and central porosity.

Abstract: Method and apparatus for continuous casting, especially casting of steel that can easily provide high quality steel that has no central segregation and central porosity.

Abstract: Method and apparatus for continuous casting, especially casting of steel that can easily provide high quality steel that has no central segregation and central porosity.

Abstract: Method and apparatus for continuous casting, especially casting of steel that can easily provide high quality steel that has no central segregation and central porosity.

Abstract: Method and apparatus for continuous casting, especially casting of steel that can easily provide high quality steel that has no central segregation and central porosity.