1981 Volume 67 Issue 8 Pages 1172-1179
The creep test on steels and the bulging test by plasticine were carried out to confirm the validity of equation derived by introducing creep concept to calculate the bulging of continuously cast slabs. At the same time, bulging was measured of the slab completely solidified in a 10.5 m R bow-type machine. The results obtained are summarized as follows:
1) At temperatures experienced in continuous casting, defomation of steel slabs is characterized by creeping. Only the transient creep was observed in a short creep time up to 30 sec during when the slabs travel a half of supporting roll spacing.
2) When the transient creep was expressed as
ε=a0σtn, (ε; Strain, σ;Stress, t; Creep time)
the creep constant a0 was expressed by an Arrhenius equation, and the value of n changed in the range of 0.40.6 depending on temperature.
3) The observed values of bulging of the slab completely solidified in the machine corresponded well with the calculated ones.