Study on Flow Stress Model of a Microalloyed High Strength Steel in CSP Hot Rolling
Hot simulation tests at different deformation technology parameters were carried out for a microalloyed high strength steel produced by CSP hot rolling and the stress-strain curves during deformation were measured. Based on the experimental results and the discussions of present flow stress models, a new flow stress model incorporating interactional effect of deformation temperature, strain and strain rate on flow stress was developed in the paper. Excellent agreement between measured and predicted flow stress values is obtained for new flow stress model of a microalloyed high strength steel rolled by CSP. In addition, the comparisons of flow stress prediction errors between several models and one given in the paper reveal that the prediction accuracy of new flow stress model presented in the paper is higher than other models.
Jitai NIU, Zuyan LIU, Cheng JIN and Guangtao Zhou
G. Xu et al., "Study on Flow Stress Model of a Microalloyed High Strength Steel in CSP Hot Rolling", Materials Science Forum, Vols. 575-578, pp. 267-272, 2008