Effect of Controlled Rolling and Cooling on Microstructure and Properties of Cold Heading Steel Containing Boron and Titanium

  • Shipeng Ruan
  • Aimin Zhao
  • Lijun Wang
  • Guangjie Han
  • Peng Zhang
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

The effect of controlled rolling and cooling on microstructure and mechanical properties of micro-alloyed cold heading steel 6AB-Ti and 35KB-Ti with diameter 6.5 mm was studied. The results showed that the controlled rolling and cooling process had a great effect on the microstructure and properties of 6AB-Ti than 35KB-Ti. For 6AB-Ti steel, the tensile strength value decreased from 460 to 360 MPa and the microstructure evolved from quasi-polygonal ferrite and pearlite to polygonal ferrite and pearlite when the finish rolling decreased from 920 to 850 °C (and the laying head temperature decreased from 900 to 800 °C). For 35KB-Ti steel, the tensile strength decreased from 630 to 610 MPa and the microstructure with ferrite net disappeared for controlled rolling and cooling process. The above phenomena are explained by the CCT curve of steel and the influence of boron and titanium on the phase transformation of steel.

Keywords

Controlled rolling and cooling Boron and titanium Microstructure Mechanical properties CCT 

References

  1. 1.
    S.P. Ruan, A.M. Zhao, J.L. Chen et al., Study on energy saving cold heading steel wire rod containing boron. Steel Rolling 32(Supplement 1), 30–34 (2015)Google Scholar
  2. 2.
    S.P. Ruan, A.M. Zhao, M.Y. Guo et al., Effect of boron and titanium on microstructure and properties of low carbon Al-killed steel. Iron Steel 51(7), 71–75 (2016)Google Scholar
  3. 3.
    S.P. Ruan, A.M. Zhao, J. Cui et al., Continuous cooling transformation behavior of 10B33 boron micro alloyed medium carbon steel for cold heading. Heat Treat. Met. 41(9), 18–21 (2016)Google Scholar
  4. 4.
    N. Tsuji, Y. Matsubara, T. Sakai et al., Effect of boron addition on the microstructure of hot-deformed Ti-added interstitial free steel. ISIJ Int. 37(8), 797–806 (1997)CrossRefGoogle Scholar
  5. 5.
    H. Hata, H. Yaguchi, M. Shimotsusa et al. Development of high quality wire rod through thermo mechanical control process. Kobe Steel Eng. Rep. 1, 29–32 (2000)Google Scholar
  6. 6.
    S.P. Ruan, L.J. Wang, J.L. Chen et al., Effect of control-rolling-cooling process on structure and properties of steel SCM435 rod coil. Spec. Steel 5, 45–47 (2016)Google Scholar
  7. 7.
    C. Camurri, C. Carrasco, I. Bello et al., Development of low carbon boron steel for wire drawing. Mater. Sci. Forum 539–543, 4238–4242 (2007)CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Shipeng Ruan
    • 1
    • 2
    • 3
  • Aimin Zhao
    • 1
  • Lijun Wang
    • 2
    • 3
  • Guangjie Han
    • 2
    • 3
  • Peng Zhang
    • 2
    • 3
  1. 1.Metallurgy Engineering Research InstituteUniversity of Science and Technology BeijingBeijingChina
  2. 2.Xingtai Iron and Steel Corp., Ltd.XingtaiChina
  3. 3.Hebei Engineering Research Center for Wire RodXingtaiChina

Personalised recommendations