the hot deformation behaviors of 97# High Strength Rod was investigated through double-hit compression experiments using Gleeble 3500 thermal-mechanical similar within the temperature range of 850~1100°C, the strain rate of 5 s-1 and the interval range of 1-100s, the softening fractiong at different pass interval and deforming temperature was determined and analyzed. The results show that when pass intervals is the same, as deformation temperature increase, the volume fraction of static recrystallization of 97# High Strength Rod increases and the recrystallization process is enchanced. Activation energy of austenite static recrystallization of 97# High Strength Rod is 100.476 kJ/mol. The kinetic equation of static recrystallization of 97# High Strength Rod by avrami equation wan obtained.

The uneven elongation between flange and web can make long tongue in the head of H-beam, which can lead to too long crop end length. In order to control the tongue length of H-beam head, different elongation ratio between flange and web is put forward to control the head displacement of H-beam. If the flange and web elongation is uniform, the loss of crop end length will be reduced. At the same time, different cooling speed of flange and web is set to keep the section uniform temperature. Experimental investigations of H-beam rolling are carried out on the universal mill in the Rolling Lab of Hebei polytechnic University. Comparisons between experimental value and simulation results prove the correctness of elongation ratio of flange and web.

No abstract