4GPa压力处理对T8钢在加热过程中固态相变动力学的影响  

Effect of 4 GPa pressure treatment on the solid state transformation kinetics of T8 steel in heating process

作　　者：谌岩[1,2] 李雅莉[3] 刘建华[1] 张瑞军[1] 

机构地区：[1]燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛066004 [2]燕山大学环境与化学工程学院,秦皇岛066004 [3]唐山职业技术学院,唐山063000

出　　处：《物理学报》2012年第19期388-393,共6页Acta Physica Sinica

基　　金：河北省留学回国人员科研启动基金资助的课题~~

摘　　要：本文通过差示扫描量热分析(DSC)法测试了经4 GPa压力处理前后,T8钢在加热过程中固态相变温度和转变时间,计算其相变激活能和.Avrami指数,并结合金相组织观察,探讨了4 GPa压力处理对T8钢在加热过程中固态相变动力学的影响.结果表明:4 GPa压力处理能使T8钢组织中形成奥氏体的温度向低温移动,相变时间和Avrami指数减小,相变激活能增大,有利于形成尺寸细小的晶粒,但对其相变机理的影响不大.The transformation temperatures and durations of solid state transformation in T8 steel before and after 4 GPa pressure treatment are measured using differentia/scanning calorimetry, and the transformation activation energy and Avrami exponent are also calculate. Then the effects of 4 GPa pressure treatment on solid state transformation kinetics in T8 Steel are investigated based on the kinetic parameters and the observation of microstructure. The results show that the solid state transformation in T8 steel shifts toward the low temperature region after 4 GPa pressure treatment. The high pressure treatment can reduce the phase transformation time and Avrami exponent and enhance the phase transformation activation energy, which is favorable for refining the grains but has little effect on the phase transformation mechanism.

关 键 词：高压处理 T8钢 固态相变 

分 类 号：TG142.1[一般工业技术—材料科学与工程]