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Isothermal compression tests were conducted on A100 steel using a Gleeble 1500 thermal simulator at a temperature range of 900–1,200°C and strain rate range of 0.001–3 s −1 . Results show that the A100 steel has higher strength than the Aermet 100 steel at high temperatures. Constant values, such as  A ,  α , and  n , and activate energy  Q  were obtained through the regression processing of the stress–strain data curves under different strains. A set of constitutive equations for A100 steel was proposed by using an Arrhenius-type equation. The optimum processing craft ranges for A100 steel based on the analysis of the hot working diagram and deformation mechanism are as follows: temperature range of 1,000–1,100°C and strain rate range of 0.01–0.1 s −1 . The average grain size within this working range is 7–22.5 μm.

The Constitutive Relationship and Processing Map of Hot Deformation in A100 steel