The production process of Φ30 mm tested cold-heading steel SWRCH22A (/%：0.18C

0.04Si

0.87Mn

0.013P

0.010S

0.039Al) is 100 t BOF- LF-150 mm x 150 mm billet casting-rolling. The test of double passes reduction of steel SWRCH22A with strain rate 1  s

-1

deformation 0.25 and time interval 0.5~15 s at 900 °C and 1000 °C has been carried out by using Gleeble-3500 thermal  simulator to get stress-strain curves of steel. The effect of deformation temperature and time interval on static recrystallization behavior of cold-heading steel SWRCH22A is analyzed and the static recrystallization percentage in steel with different deformation conditions is calculated by using stress compensation method. According to the experimental data

the calculated static recrystallization activation energy Q

rex

of steel SWRCH22A is 249 287

J/mol. And the static recrystallization kinetic model is obtained by reference of semi-empirical formulas. The model calculated values are in agreement with the test results.