Ultra-low-carbon steel spheroidization and torsion
Yan-jun Yin1 . Ji-quan Sun . Ai-min Zhao . Jin Gou1
1 Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, China 2 Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
Ultra-low-carbon steel spheroidization and torsion
Yan-jun Yin1 . Ji-quan Sun . Ai-min Zhao . Jin Gou1
1 Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, China 2 Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
摘要 In this work, the study of spheroidization annealing and torsion tests of 0.027wt% carbon steel rod was carried out. The spheroidization kinetic behavior at 943 K (670 °C) under deformed and non-deformed state was measured furthermore the kinetic curves were predicted by JMAK equation and agree well with experimental ones. After performing the spheroidization process twice the spherical cementite and precipitated carbides were smaller and the distribution more uniform. The comparison of materials subjected to single and double spheroidization annealing showed the difference in grain size, and the torsion performance was greatly improved under twice spheroidization, especially, the maximum torque with tiny variations.
Abstract：In this work, the study of spheroidization annealing and torsion tests of 0.027wt% carbon steel rod was carried out. The spheroidization kinetic behavior at 943 K (670 °C) under deformed and non-deformed state was measured furthermore the kinetic curves were predicted by JMAK equation and agree well with experimental ones. After performing the spheroidization process twice the spherical cementite and precipitated carbides were smaller and the distribution more uniform. The comparison of materials subjected to single and double spheroidization annealing showed the difference in grain size, and the torsion performance was greatly improved under twice spheroidization, especially, the maximum torque with tiny variations.
YIN -Yanjun,GUO -Jin. Ultra-low-carbon steel spheroidization and torsion[J]. Journal of Iron and Steel Research International, 2018, 25(9): 968-974.
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2018, Vol. 25 
