PURPOSE: To prevent the development of defect, such as breakage, traversing crack, etc., in a continuously cast strip just below a mold by controlling peripheral velocity of rolls, charging position of the advancing direction or cooling velocity for the continuously cast strip at the time of casting molten steel by twin roll type continuous casting method.
CONSTITUTION: At the time of producing the continuously cast strip S by pouring the molten steel in a tundish T into the twin roll mold R, temp. of cast strip S is measured by thermometers (t), (t) at two points of upper and lower parts of cooling device (r) just below the twin roll type mold, and the cast strip cooling device (r) is controlled, so that cast strip temp. at position P1 of roll starting bending of continuously cast strip S is become to lower than temp. of brittle zone. Or, in case the casting velocity can be changed the peripheral velocity (v) of mold roll is changed and the time, when the continuously cast strip S is reached to P1 position, is changed to control the cast strip temp. Or, by changing the starting point of bending into the position of P1', the distance from out of mold roll till starting bending is changed, to control the cast strip S temp., and the continuously cast strip S is smoothly produced without any accident.
TANAKA SHIGENORI
UEDA MASANORI
| JPS6028579A | 1985-02-13 |