中文摘要：

分别在无磁场和12 T强磁场条件下,研究了冷却速度对高纯Fe-0.36C合金铁素体转变的影响。结果表明12 T强磁场显著抑制针片状先共析魏氏组织铁素体的形成,并演变为沿磁场方向形成伸长且呈链状排列的先共析铁素体形貌,但随退火冷却速度的提高,针片状魏氏组织铁素体含量呈不断增加的趋势。这是由于强磁场引起的两相自由能的改变与界面能和弹性应变能共同作用所致。

英文摘要：

The influences of cooling rate on transformation of Ferrite in high purity Fe-0.36 C alloy without or with a 12 T high magnetic field were studied. The results show that the high magnetic field of 12 T can significantly inhibit the formation of proeutectoid Widmanst覿tten ferrite. The evolution to the proeutectoid ferrite grains is elongated and aligned along the field direction. The amount of acicular proeutectoid Widmanst覿tten ferrite in the specimens transformeed under the magnetic field increases with the increase of cooling rate. The reasons for the observed phenomena are discussed on the basis of free energy,interfacial energy and elastic strain energy of the involved phases transformed under the high magnetic field.