Influence of Annealing Heating Rate on Nb Ferritic Stainless Steel Microstructure and Texture

Abstract:

The cold rolled band of the niobium stabilized type ASTM 430 ferritic stainless steel with 85 % thickness reduction was annealed with heating rates of 0.10, 6.8, 23.5 and 41.5 °C/s and a soaking time of 24 s. The changes in microstructure and texture were followed by interruptions in the annealing cycle at temperatures of 780, 830 and 880 °C. Annealing at the lower heating rate was more effective for the development of γ-fiber than the annealing performed with high heating rate. The increased rate of heating provided an increase in the onset recrystallization temperature, a reduction in average grain diameter and a more homogeneous distribution throughout the thickness. The specimens with higher volume fraction of the γ-fiber annealed with low heating rate showed a high average coefficient of anisotropy R =1.99.

• Periodical: Materials Science Forum (Volume 753)
• Pages: 217-220
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.753.217
• Online since: March 2013
• Authors: Daniella Gomes Rodrigues, Tarcísio Reis Oliveira, Dogoberto Brandão Santos, Berenice Mendonça Gonzalez
• Keywords: Anisotropy, Ferritic Stainless Steel (FSS), Heating Rate, Texture

References

[1] M. –Y. HUH, O. ENGLER, MATERIALS SCIENCE AND ENGINEERING A. 308 (2001) 74-78.

[2] D. Wei, J. Lai-zhu, S. Quan-she, L. Zhen-yu, Z. Xin, Journal of Iron and Steel Research. 17 (2010) 47-52.

[3] J. T. Park, J. A. Szpunar, S. Y. Cha, ISIJ International. 43(2003)1611-1614.

[4] T. Senuma, K. Kawasaki, Y. Takemoto, Materials Transactions. 47(2006)1769-1775.