Influence of Hot Plastic Deformation Modes on the Structure and Properties of Quenched Hot Rolled Economically Alloyed High-Strength Steel
Abstract—The peculiarities of the structure formation of low-carbon high-strength economically alloyed steel with guaranteed yield strength of 750 MPa are studied using EBSD analysis after hot plastic deformation an various temperatures simulated on a GLEEBLE 3800 plastometer. A comprehensive approach includes the estimation of the size of hardness austenite grains and their heterogeneity, as well as the construction of size distribution histograms of structural elements and angles of misorientations between them. The relative extent of small-angle boundaries is analyzed as well. The results are confirmed by study of sheet metal of thickness up to 40 mm manufactured under industrial conditions.
Keywords:high-strength economically alloyed steel guaranteed yield strength of 750 MPa GLEEBLE 3800 plastometer static austenite recrystallization grain size bainitic-martensitic structure structural element size misorientations EBSD analysis
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