强磁场对Fe-0．12C合金在顺磁居里温度以上先共析铁素体等温转变的影响  

Effect of Proeutectoid Ferrite Isothermal Transformation Above Paramagnetic Curie Temperature in Fe-0.12C Alloy Under a high Magnetic Field

作　　者：王守晶[1] 赵骧[1] 左良[1] 

机构地区：[1]东北大学材料各向异性和织构教育部重点实验室,辽宁沈阳110004

出　　处：《中国材料科技与设备》2008年第1期79-81,88,共4页Chinese Materials Science Technology & Equipment

基　　金：国家自然科学基金杰出青年基金资助项目（50325102）;国家自然科学基金资助项目（50571024）

摘　　要：利用光学显微镜研究了强磁场对高纯度Fe—0．12C合金在顺磁居里温度以上先共析铁素体等温转变的影响。结果表明：在铁素体呈顺磁性且磁化率很低的顺磁居里温度以上进行等温转变，强磁场能够显著促进Fe-0．12C合金的块状先共析铁素体的转变，增加块状先共析铁素体的转变量。在顺磁居里温度以上，随等温转变温度的降低，块状先共析铁素体晶粒沿磁场方向伸长且呈链状形式排列。这是因为强磁场作用下先共析铁素体在较低温度等温转变时的磁偶极子相互作用增强所致。The effect of high magnetic field on proeutectoid ferrite isothermal transformation in high purity Fe-0.12C alloy has been studied by using optical microscope. The results show that： above the paramagnetic Curie temperature, magnetic susceptibility of paramagnetic ferrite is very low. At this temperature to carry out the isothermal transformation, high magnetic field could obviously accelerate the transformation of massive proeutectoid ferrite and increase the quantity of massive proeutectoid ferrite. With the decrease of isothermal transformation temperature, massive proeutectoid ferrite is prolonged along the magnetic field direction and aligned chain. This is due to the interacting enhancement of magnetic doublet at a relative low temperature under a high magnetic field.

关 键 词：强磁场 铁碳合金 顺磁居里温度 先共析铁素体 等温转变 

分 类 号：TG111.5[金属学及工艺—物理冶金]