Texture Evolution, Formability and Ridging Resistance of a Sn-bearing Ferritic Stainless Steel Under Different Hot Band Annealing Temperatures

• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2019,（11）
• 页码范围: 1362-1372
• 页数: 11页
• 语种: 英文

摘要

The microstructure,texture evolution and spatial orientation distribution during cold rolling and the subsequent annealing as well as formability and ridging of a Sn-bearing ferritic stainless steel under different hot band annealing temperatures were investigated.The four hot bands with annealing temperatures of 900,950,1000 and 1050 ℃ were all cold-rolled to 80％ reductions and then were annealed at the same temperature of 900 ℃.The results show that optimizing hot band annealing process is beneficial to reduce the amount of {001 } < 110> grains and weaken the texture intensity,and thus,to reduce ridging and improve formability.In the present study,the final sheets with hot band annealing temperature of 900 ℃ possess small and inhomogeneous grains with a large amount of { 001 } < 110> orientations,which deteriorates the formability and increases the ridging.In comparison,the final sheets with hot band annealing temperature of 950 ℃ are comprised of uniform and equiaxed < 111 >//ND (ND:normal direction) recrystallized grains with a high texture intensity favorable for the improvement in r value and surface quality.However,when hot band annealing temperature further increases to 1000 and 1050 ℃,it shows a sharp decrease in r value and a remarkable increase in ridging as a result of a reduction in γ-fiber texture intensity and an increase in grain size in the final sheets.Suitable controlling and optimizing hot band annealing process is essential to improve the formability and reduce the ridging.