淬火温度对Fe-3Mn合金γ→α转变过程的影响  

Influence of quenching temperature on austenite-ferrite phase transformation behavior of Fe-3Mn alloy

作　　者：张哲平[1,2] 韩雅静[3,2] 高志明[3,2] 刘永长[3,2] 杨留栓[4] 

机构地区：[1]天津钢管集团有限公司管加工厂技术科,天津300301 [2]天津市材料复合与功能化重点实验室,天津300072 [3]天津大学材料科学与工程学院,天津300072 [4]平顶山工学院,河南平顶山467001

出　　处：《材料热处理学报》2009年第1期50-54,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(No.50401003);全国优秀博士论文作者专项基金(No.200335);天津市自然科学基金(No.033608811;07JCZDJC01200);河南省国际合作项目(No.0546620015)资助

摘　　要：采用高精度线膨胀仪研究置换型Fe-2.72at%Mn中γ→α的转变行为,对其转变动力学过程为进行了分析。通过在冷却过程中选取不同的淬火温度进行研究表明,选取的淬火温度点越高,奥氏体向铁素体开始转变的温度就越低,完成相变过程所需时间就越短,铁素体生成速率的绝对值也越优先达到最大值;转变后试样室温晶粒组织分析表明,转变过冷度的增大将伴随晶粒明显细化,为相变过程组织控制提供了新思路。The austenite transformed to ferrite （γ→α） behavior and the kinetic process in substitutional Fe-2.72 at % Mn ahoy were investigated by high-resolution differential dilatometer. Different quenching temperatures were chosen to study the phase transformation behavior during cooling process. The results show that the onset temperature of austenite to ferrite （γ→α） transformation decreases with increasing the quenching temperature and the transformation process finished in a short time, as well as the feiTite formation rate （dfo/dt） has the absolute maximum priority. Additionally, the microstructure observation and analysis show that the grain size decreases with increasing of the degree of undercooling, which provide a new idea for microstructure controlling during phase transformation process.

关 键 词：固态相变 线膨胀 过冷度 晶粒直径 

分 类 号：TG142.2[一般工业技术—材料科学与工程]