Micro-textures and mechanical properties of Fe–21Cr–15Ni–6Mn–Mo–Nb austenitic stainless steel plate in asymmetric hot rolling

Micro-textures and mechanical properties of Fe–21Cr–15Ni–6Mn–Mo–Nb austenitic stainless steel during asymmetric hot rolling were studied. The results show that the shear texture is the dominant texture on the upper surface of steel sheet when the specific velocity ratio is 1.1, and the orientation of γ-Fiber was beneficial to recrystallization and nucleation. The texture strength of the central layer of the steel plate was concentrated in the Cube orientation. When the velocity ratio increases to 1.2, the complete recrystallization of the upper and central layers of the plate was more likely to occur under the condition of high deformation energy, and the structure of the steel sheet had tended to homogenize. Under the conditions of low reduction (20%) or low finishing temperature (860 °C), the steel sheet was partially recrystallized or non-recrystallized, and there were a lot of deformation textures during rolling. In the process of asymmetric hot rolling, the crystal rotates around the direction of TD, and the initial texture of weak γ-Fiber and Copper deviates from the ideal position and gradually approaches to the direction of γ-Fiber. Based on the research, the tested austenitic stainless steel had high strength and toughness (the yield strength, the tensile strength and the elongation is 710.1 MPa, 1010.2 MPa and 46.7%) under the rolling process with specific speed ratio 1.2, the initial rolling temperature 1100 °C and the reduction 60%.