Journal of Northeastern University ›› 2013, Vol. 34 ›› Issue (3): 356-359.DOI: -

• Materials & Metallurgy • Previous Articles     Next Articles

Continuous Cooling Transformation Behavior of Subcooling Austenite of SCM435 Steels

XU Dong1, ZHU Miaoyong1, TANG Zhengyou1, LIU Zhenmin2   

  1. 1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China; 2. Xingtai Iron and Steel Company Limited, Xingtai 054027, China.
  • Received:2012-06-07 Revised:2012-06-07 Online:2013-03-15 Published:2013-01-26
  • Contact: XU Dong
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Abstract: The continuous cooling transformation (CCT) curves of SCM435 steels were determined and analyzed using a thermal simulation testing machine. The results showed that SCM435 steels were very sensitive to the cooling rates. Ferrite, pearlite and small amount of bainite were observed when the cooling rate was 005℃/s. When the cooling rate increased to 1℃/s, ferrite began to end its phase transformation, and a little amount of martensite began to appear. In the actual production, the cooling rates were controlled by combining with the modeling predict so that the production of massive ferrite primaryprecipitated was suppressed, the appearance of a large amoun of martensite was avoided and the desirable microstructure for good cold heading property and the spheroidization effect was obtained.

Key words: thermal simulation, austenite, CCT curve, cooling rate, SCM435 steels

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