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Hot compression deformation behaviors of medium carbon Cr-Ni-Mo-Nb steel were investigated at deformation temperatures ranging from 1223 to 1423 Kand strain rates of 0.1,1and 5s~(-1).Dynamic recovery(DRV)and dynamic recrystallization(DRX)were observed during the hot compression deformation.For all of the samples,DRX occurred at deformation temperatures above 1323 Kat different strain rates,while below 1223 K,no DRX was observed.The activation energy of the tested steel was determined as 386.06kJ/mol.The ratio of critical stress to peak stress and the ratio of critical strain to peak strain were 0.835 and 0.37,respectively.Kinetic equations interpreting the DRX behavior of the tested steel were proposed,and the corresponding parameters including the volume fraction and the average grain size were determined.Moreover,the microstructures induced under different deformation conditions were analyzed.
Hot compression deformation behaviors of medium carbon Cr-Ni-Mo-Nb steel were investigated at strain temperature ranging from 1223 to 1423 Kand strain rates of 0.1,1 and 5s -1. Dynamic recovery (DRV) and dynamic recrystallization (DRX) were observed during the hot compression deformation. For all of the samples, DRX occurred at above 1323 Kat different strain rates, while below 1223 K, no DRX was observed. The activation energy of the tested steel was determined as 386.06 kJ / mol . The ratio of critical stress to peak stress and the ratio of critical strain to peak strain were 0.835 and 0.37, respectively. Kinetic equations interpreted the DRX behavior of the tested steel were proposed, and the corresponding parameters include the volume fraction and the average grain size were determined. More than, the microstructures induced under different deformation conditions were analyzed.