Effect of Annealing Time on the Formability of a Ultra Purified Ferritic Stainless Steel Containing Copper

Abstract:

For developing of a ultra-purified ferritic anti-bacterial stainless steel, 1.4 Cu % was added in 21% Cr ferritic stainless steel. The effect of annealing time on the formability was analyzed. The micro texture of steel was measured by using electron back scattering diffraction analysis. The Cu precipitates through different annealing periods were investigated by means of transmission electron microscopy. Average plastic strain ratio was calculated by the r values at 0, 45°and 90° directions measured by tensile testing. The results shows that with the extension of annealing time, the morphology of the Cu precipitates became into rod from spherical and the size increased. Average plastic strain ratio increased first and then decreased, while the change trend of anisotropy index was opposite. The higher formability is due to the {111} texture components increase significantly, while more {001}<110> component at 60 min was adverse for the formability. And anisotropy index was determined by γ components and {110}<110> components.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 566-570
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.566
• Online since: March 2016
• Authors: Hong Xiang Yin*, Ai Min Zhao, Zheng Zhi Zhao, Xu Ming Wang, Kai Chun Zhou, Shao Heng Sun
• Keywords: Annealing Time, Cu Precipitates, Ferritic Stainless Steel, Formability, Texture

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