Hot Deformation Characteristics of 9Cr-1.5Mo-1.25Co-VNb Ferritic-Martensitic Steel

The hot workability of 9Cr-1.5Mo-1.25Co-VNb ferritic-martensitic steel was investigated through hot compression tests using Gleeble simulator over a temperature range of 1223 K (950 °C) to 1573 K (1300 °C) and strain rates of 0.001 to 0.5 per second. Through an analysis of the stress(σ)–strain(e) curves obtained during the hot compression tests, a processing map was developed to predict the hot workability, based on a dynamic material model...