Li Y., Li Y., Yang M., Wei F., Yuan Q., Cui F., 2015, Determination of 40Cr Johnson–Cook Dynamic Constitutive Equation for Cold roll-beating Forming Process, Chemical Engineering Transactions, 46, 1159-1164.
As a near net-shape advanced manufacturing technology, cold roll-beating is a dieless unconstrained incremental forming technology. For the features of the forming process, it is necessary to study the forming mechanism under thermal–mechanical coupling conditions, thus it is very significant to investigate the mechanical properties of material under high temperature and high strain rate. To explore the forming mechanism of the cold roll-beating forming technology, 40Cr quenched and tempered steel dynamic compression experiments used a separate SHPB system. Dynamic compression tests and static compression experiments under different conditions were carried out. Based on the experiment analysis, the strain hardening coefficient, the strain rate sensitivity coefficient, and the thermal softening coefficient were determined, thus the Johnson–Cook dynamic constitutive equation for 40Cr was built, which can provide theoretical basis for further study of the thermal–mechanical coupling effects of 40Cr cold roll-beating forming process.
