空冷状态下金属相变温度的实测判定

钢铁研究学报, 2008, 20(2): 37-0.

空冷状态下金属相变温度的实测判定

陈连生 , 狄国标 , 赵金锋 , 齐建军 , 诸葛铭毅 , 刘相华

1.1. 东北大学轧制技术及连轧自动化国家重点实验室, 辽宁沈阳 110004

2.2. 河北理工大学冶金与能源学院,河北唐山 063009

3.3. 石家庄钢铁公司技术中心, 河北石家庄 050031

 2. College of Metallurgy and Energy Resources, Hebei Polytechnic University, Tangshan 063009, Hebei, China

 3. Research and Development Center, Shijiazhuang Iron and Steel Co Ltd, Shijiazhuang 050031, Hebei, China

关键词：空冷;相变潜热;相变点;CCT曲线

Predication Method of Transformation Temperature of Metal Under Air Cooling Condition

CHEN Liansheng , DI Guobiao , ZHAO Jinfeng ,  QI Jianjun , ZHUGE Mingyi , LIU Xianghua

Keywords： air cooling;transformation potential heat;transformation point;CCT curve

实测了空冷条件下金属的温度，分析了相变潜热释放引起的温降速度变化规律，并通过冷却速度曲线畸变特征点对实际工况下的金属相变开始温度和结束温度以及相变持续时间进行了判定。结果表明：该判定方法能够准确判断非恒速缓慢冷却时金属的相变特征点，解决了热模拟CCT曲线在实际应用中的局限性，是一种适合于实际生产应用的相变特征点的数值判定方法。

Metal transformation temperature under air cooling condition was actually measured. The variation of cooling rate caused by the released transformation potential heat was analyzed. The starting temperature, finish temperature and time of transformation were determined by using cooling rate distorted characteristic points of metal. Comparison indicated that the method can exactly judge the transformation characteristic points. The limitation of CCT curves used in practice has been settled and the method is adapted to practice production.

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