EVOLUTION OF RECRYSTALLIZATION MICROSTRUCTURE AND TEXTURE IN LOW CARBON CSP STEEL DURING ANNEALING

摘要

Microstructure evolution and texture formation in low carbon CSP steel were observed by means of metallgruphic, TEM, and SEM equipped with electron back scattered diffraction (EBSD) system. The influence of large particles and fine carbonitrides precipitates on recrystallization and texture formation during the annealing procedure was analyzed with Small Angle X-ray Scattering (SAXS) technique in the steel. It was found that the fine precipitates present in the steel have shown ability to stimulate recrystallization nucleation and transformation during deformation, but hard to accelerate recrystallization growth because of grain boundary pinning effects in the steel. Compared with the conventional low carbon steel, the recrystallization texture and microstructure of the CSP steel show distinct character, and thus modify the mechanical behaviour of the final products.