摘要
分别采用计算法、膨胀法和差示扫描量热(DSC)法对热轧态Q345钢的临界点进行了测定与分析,系统讨论了3种测定方法的准确性、一致性和适用性。结果表明:计算法、膨胀法、DSC法所测定的临界点结果具有一致性,热轧态Q345钢的临界点Ac1和Ac3分别约为730℃和860℃;对于热轧态Q345钢临界点的测定,如使用膨胀法推荐依据YB/T 5127-1993的方法进行测定,如使用DSC法推荐以10～20℃·min^(-1)的升温速率进行测定。
The critical points of hot rolled Q345 steel were determined and analyzed by calculation method,expansion method and differential scanning calorimetry(DSC)method,respectively.The accuracy,consistency and applicability of the three measuring methods were discussed systematically.The results show that the critical points determined by calculation method,expansion method and DSC method were consistent.The critical points of Ac1 and Ac3 of hot rolled Q345 steel were about 730 and 860℃,respectively.For the determination of the critical points of hot rolled Q345 steel,the expansion method is recommended to be based on YB/T 5127-1993,and the DSC method is recommended to be used at the heating rate of 10-20℃·min^-1.
作者
史学星
鞠新华
蔡宁
其其格
王文昌
SHI Xuexing;JU Xinhua;CAI Ning;QI Qige;WANG Wenchang(Research Institute of Technology, Shougang Group Co., Ltd., Beijing 100043, China)
出处
《理化检验（物理分册）》
CAS
2019年第5期311-314,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
临界点
计算法
膨胀法
差示扫描量热法
critical point
calculation method
expansion method
differential scanning calorimetry method
作者简介
史学星(1981-),女,高级工程师,主要从事冶金理化检验和钢铁材料基础研究,sxxkmlg@163.com.
