2010•Heat treatment of metalsRequires access
Effects of annealing temperature on microstructure and properties of ultra-low-carbon cold-rolling Ti-Nb IF steel
HU Yin-ping
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Abstract
The effects of annealing temperature on microstructure and mechanical properties of automobile ultra-low-carbon cold-rolling Ti-Nb IF steel were studied.The experimental results show that the tested steel can not finish recrystallization process when the annealing temperature is lower than 760 ℃.However, in the temperature range of 780 ℃ to 840 ℃, the tested steel can finish recrystallization process and the final crystal grain level is I9.5.With increasing the annealing temperature, the strength of the steel decreases and its plasticity increases, and then rate of strain hardening, rate of plastic strain and rate of elongation also increase.