The structure evolution of pearlite and overcooling austenite of 0.75C eutectoid carbon steel during com- pression has been studied by Gleeble 2000 and 1500 thermal simulation machines.The test results showed that as sample heated with 10 ℃/s to700 ℃ for 3 min than carried out 60% reduction
the lamellar pearlite in steel broke up and frac- tured; and as sample heated to 1150 ℃ for 1 min for austenization than cooled with 20 ℃/8 to 700 ℃ and reduced by 60%
the partial overcooling austenite in steel transformed to fine lamellar pearlite under effect of deformation.