摘要 |
PURPOSE:To cast a continuous slab of an austenitic stainless steel which does not require surface conditioning by using specific powder and specifying the oscillation conditions of a casting mold. CONSTITUTION:Mold powder of which the viscosity at 1,300 deg.C is 1.1-1.9 poise is used and the oscillation conditions for a casting mold conforming to the equation I and satisfying the equation II are specified. The tN, tP in the equations I , IIare expressed respectively in the equations III, IV and in the equations III, IV, V; the drawing speed of a casting mold (mm./sec), (f); the oscillation frequency of the mold (cycle/sec), (a): amplitude (mm.). If an austenitic stainless steel is cast continuously under such conditions, the generation of the defect occuring in an oscillation mark is obviated and the need for surface conditioning is eliminated. |