东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (3): 356-359.DOI: -

• 材料与冶金 • 上一篇    下一篇

SCM435钢奥氏体连续冷却转变行为

徐东1，朱苗勇1，唐正友1，刘振民2   

  1. (1东北大学材料与冶金学院，辽宁沈阳110819；2邢台钢铁有限责任公司，河北邢台054027)
  • 收稿日期:2012-06-07 修回日期:2012-06-07 出版日期:2013-03-15 发布日期:2013-01-26
  • 通讯作者: 徐东
  • 作者简介:徐东(1984-)，男，河南信阳人，东北大学博士研究生；朱苗勇(1965-)，男，浙江诸暨人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学青年基金资助项目(51004030，50901014).

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
  • About author:-
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摘要： 利用热模拟试验机对SCM435钢的奥氏体连续冷却转变(CCT)曲线进行了测定和分析.结果表明:SCM435钢对冷速极为敏感，在冷却速度为005℃/s时，可以得到铁素体、珠光体及少量贝氏体组织；当冷速增加到1℃/s时，铁素体转变结束，同时开始产生少量马氏体组织.在实际生产中，通过与模拟预测相结合来控制冷却，抑制块状先析铁素体的生成，同时避免马氏体的大量产生，生产出冷镦性能及球化效果较为理想的基体组织.

关键词: 热模拟, 奥氏体, CCT曲线, 冷却速度, SCM435钢

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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