Effect of Ti content on recrystallization temperature and mechanical properties of IF steel

doi:10.13251/j.issn.0254-6051.2022.02.013

Abstract

Abstract: Effect of Ti content on recrystallization temperature and mechanical property change of the cold-rolled IF steel annealed at different temperatures was studied by means of hardness test, tensile test, field emission scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that the size, distribution and volume fraction of nano-precipitates in the IF steel decrease with the decrease of Ti content, and the pinning effect and recrystallization temperature decrease. After annealing at 630 ℃ for 10 h, the yield strength, tensile strength, elongation, strain hardening exponent (n value) and plastic strain ratio (r value) of the IF steel with lower Ti content are 198 MPa, 312 MPa, 36.78%, 0.25 and 2.42, respectively, which meet the performance requirements of ultra-deep drawing steels.

Key words: interstitial-free steel, Ti content, recrystallization, annealing, mechanical properties

CLC Number:

TG335

Feng Yundong, Zou Yuming, Ding Hua. Effect of Ti content on recrystallization temperature and mechanical properties of IF steel[J]. Heat Treatment of Metals, 2022, 47(2): 70-73.

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