摘要
采用差示扫描量热仪分别对未添加稀土和添加稀土的30Mn钢进行连续加热实验,利用Kissinger和JMA方程计算了材料的相变激活能和动力学因子。结果表明,添加0.2%(质量分数)的稀土硅铁合金使30Mn钢奥氏体化的起始温度A_(c1)和结束温度A_(c3)提高,相变激活能增加了186 k J/mol,相变动力学因子n值减小。未添加稀土和添加稀土的30Mn钢的奥氏体化过程均可分为2个阶段,并且不同阶段具有不同的晶粒长大机制。
30Mn steel with and without rare earth addition was continuously heated by differential scanning calorimetry（DSC）. The transformation activation energy and kinetic factor were obtained by Kissinger and JMA equation. The results show that the values of the starting temperature A_（c1） and the end temperature A_（c3） are raised by adding 0.2%（mass fraction） rare earth ferrosilicon alloy. The activation energy can be increased by 186 kJ/mol, and the value of kinetic factor n is decreased. The austenitic transformation process of 30 Mn steel with and without rare earth addition have been described as two stages, and different stages have different grain growth mechanisms.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第7期1912-1919,共8页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51405325
51135007)
高等学校科技创新项目(2014144)
校博士科研启动基金(20162024)
关键词
稀土
差示扫描量热法
连续加热
奥氏体化
相变
rare earth
differential scanning calorimetry
continuous heating
Austenitizing
transformation
作者简介
闫红红，女，1978年生，博士，副教授，太原科技大学机械工程学院，山西太原030024，电话：0351-6998115，E-mail：yhhtyust@1163．com
