PREDICTION METHOD OF TRANSFORMATION TEMPERATURE AND MICROSTRUCTRES OF HOT ROLLED PLATE

摘要

The present invention discloses a rolled steel is transformed when the transformation of the cooling termination temperature and the phase fraction by prediction, transformation and transformation heat expansion can be used in the plate-like prediction, and, after a suitable transformation starting temperature and the transformation time to control the mechanical properties of the steel product based on the final microstructure of a method for predicting the microstructure. ; This invention provides a method of predicting a transformation start temperature and the cooling after the microstructure of the steel plate cooling, predicting a transformation starting temperature from before the microstructure transformation of the steel plate; Predicting the ferrite volume fraction after the cooling of the steel plate; The transformation starting temperature, and a transformation curve obtained via the ferrite volume fraction, and the transformation rate constant, obtaining a volume fraction of each phase and the mean transformation temperatures; Transformation temperature to provide a fine structure and the prediction method, including; and using the value to predicting the ferrite grain size.