连续冷却过程中微合金钢铁素体相变测量方法研究  

Investigation on the Ferrite Transformation Measurement Methods During Continuous Cooling

作　　者：张淑兰[1] 李红[2] 俆李军 王昌[1] ZHANG Shulan 1, LI Hong 2, XU Lijun 1, WANG Chang 1(1 Central Iron＆Steel Research Institute, Beijing 100081; 2 Advanced Technology ＆ Materials Co., Ltd, Beijing 10008)

机构地区：[1]钢铁研究总院,北京100081 [2]安泰科技股份有限公司,北京100081

出　　处：《材料导报》2018年第A01期419-422,438,共5页Materials Reports

摘　　要：本工作分别利用热膨胀法、差示扫描量热法以及高温激光共聚焦原位观察法分析检测微合金钢在连续冷却过程中产生的铁素体相变以研究各种测试方法的适用性。实验结果表明,热膨胀法、差示扫描量热法及高温激光共聚焦原位观察法均可用于铁素体相变起始温度测量,但差示扫描量热法测得的珠光体相变热信号较热膨胀法测量的珠光体相变体积信号强,且实验结果重复性好;热膨胀法能更直观地表现相变过程中的体积变化;高温激光共聚焦原位观察法尤其适合于观察能够引起表面浮凸的相变及其对应的相变过程,包括相变起始形核位置及相变所需时间等。差示扫描量热法与高温激光共聚焦原位观察法相结合可全面描述相变动力学过程。The hot dilation,DSC method and high temperature confocal laser scanning microscope（CLSM）observation methods were used to measure the ferrite transformation temperature during continuous cooling in order to find the appropriate method to measure transformation.The experiment results show that the three methods all can be used to measure ferrite transformation temperature.In addition,the DSC has more sensitive hot signal to measure the pearlite transformation compared with the hot dilation method with volume signal.What＇s more,the ferrite transformation temperatures measured by DSC method have good repeatability.The experiment results prove that the hot dilatation method adapt to measure the transformation with obvious volume change.The high temperature CLSM observation method can be used to measure different kinds of transformation,particularly adapt to measure the transformation with surface relief and record the transformation course,including the nucleation location and transformation time.Furthermore,combing DSC method and high temperature CLSM observation method can describe the dynamic transformation course completely.

关 键 词：热膨胀法 差示扫描量热法 高温激光共聚焦 铁素体相变 

分 类 号：TG142.1[一般工业技术—材料科学与工程]