| 摘要 |
PURPOSE:To estimate the internal quality of a cast piece over the entire length thereof in a casting direction without time lag in a non-destructive manner, by measuring the upper and lower average width or short side trapezoidal amount of the cast piece on and after the correcting zone outlet of a curved type continuous casting machine. CONSTITUTION:In a low machine height (H) multi-point correcting curved continuous casting machine (LHCCM) having a fundamental circular arc zone 2, a cast piece bending multi-point correcting zone 3, a horizontal zone 4, a secondary cooling (water pouring) zone 5 and a water pouring completion point 6, a continuously cast piece 7 is cast by using a rectangular mold 1 and the upper and lower average width or short side trapezoidal amount thereof is measured directly after the machine end of LHCCM while an internal crack index is calculated by using the scatter diagram of the average width or short trapezoideal amount and the internal crack index. By this method, the internal quality of the cast piece 7 is estimated without time lag in a non-destructive way. |
