Effects of Sn microalloying on cold rolling and recrystallization textures and microstructure of a ferritic stainless steel

Journal Article · Thu Mar 15 04:00:00 EDT 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2018.01.022· OSTI ID:22804924

Bai, Yang ^[1]; He, Tong ^[2]; Liu, Yandong ^[1]

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1. Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education, Northeastern University, Shenyang 110004, Liaoning (China)
2. Research Academy, Northeastern University, Shenyang 110004, Liaoning (China)

Highlights: • Sn microalloying contributes to the enhancement in cold rolling texture intensity and the acceleration in cold rolling texture transformation. • Sn microalloying promotes the recrystallization process, and recrystallization occurs preferentially in steel with Sn compared with Sn-free steel. • Sn microalloying inhibits the growth of recrystallized grains, and the finer grains are obtained in steel with Sn. - Abstract: We investigated the effects of Sn microalloying on cold rolling and recrystallization textures and microstructure of a ferritic stainless steel. The as-received hot rolled sheets were cold rolled at 10%–90% reductions; the sheets cold rolled up to an 80% reduction were annealed at 740–880 °C for 5 min. For comparison, the cold rolling and recrystallization textures of the steel sheets with and without Sn were determined with the conventional X-ray diffraction method. The cold rolling and recrystallization metallographic microstructures were measured by scanning electron microscope and optical microscope, and the crystal orientation maps of the cold rolled and annealed samples were observed by electron backscattered diffraction. The micro-hardness was determined using a digital micro-hardness tester. Our results show that Sn microalloying in a medium chromium ferritic stainless steel plays multiple roles in the cold rolling and recrystallization processes. Sn micrcoalloying contributes to the enhancement in cold rolling texture intensity and the acceleration in cold rolling texture transformation. Sn microalloying is beneficial in promoting the recrystallization process. Recrystallization occurs preferentially in the ferritic stainless steel with Sn. Sn microalloying plays an important role in inhibiting the growth of recrystallized grains. The finer grains are obtained in ferritic stainless steel with Sn when annealing at high temperatures.

• OSTI ID: 22804924
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 137; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
ANNEALING
CRYSTALS
DIFFRACTION METHODS
FERRITIC STEELS
HARDNESS
METALLOGRAPHY
MICROSTRUCTURE
RECRYSTALLIZATION
ROLLING
SCANNING ELECTRON MICROSCOPY
STAINLESS STEELS
TIN COMPOUNDS
X-RAY DIFFRACTION