DU Wei
,
JIANG Lai-zhu
,
SUN Quan-she
,
et al
钢铁研究学报(英文版)
The effect of hot band annealing processes, namely simulated batch annealing and continuous annealing, on microstructure, texture, grain boundary character and r-value of ferritic stainless steel was investigated. The hot band displayed a highly elongated ribbon-like structure and a pronounced deformation texture. The fully recrystallized grains were observed after continuous annealing while the “typical” hot-rolled structure was remained after batch annealing. Also, the α-fibre texture formed during hot rolling almost disappeared after continuous annealing and a weak γ-fibre texture was obtained. By contract, the α-fibre texture remained very stable after batch annealing. After cold rolling and recrystallization annealing, the favorable γ-fibre texture was achieved in the continuous annealed steel. Instead of forming the γ-fibre texture, the recrystallization texture was notably shifted toward {223}<582> in the batch annealed steel. Finally, the improvement in drawability with high r-value and low △r-value were also displayed in sheet through the initial continuous annealing process.
关键词:
microstructure;texture;grain boundary character;drawability;hot band annealing
DU Wei
,
et al
钢铁研究学报(英文版)
The microstructure, texture and formability of Nb+Ti stabilized high-purity ferritic stainless steel were investigated. The interstitial elements C and N could be fully stabilized with Nb and Ti, and the precipitates were mainly composed of TiN and NbC. By analyzing texture at the various thermomechanical processes, the intensity of α-fiber obtained during hot rolling was reduced greatly after annealing and a non-uniform γ-fiber was achieved. The favorable γ-fiber was displayed in cold rolled and annealed sheet, whereas the texture maximum located at (554)<225>. The formation of this shifted texture mainly attributed to the influence of “Zener” drag and selective growth. Finally, the obtained mean r-value was notably higher, mean r=1.70, compared with traditional ferritic stainless steels.
关键词:
texture;microstructure;formability;dual stabilization
