强磁场下保温时间对Fe-1.1%C钢中“反常”组织的影响  

Effect of holding time on abnormal microstructure in Fe-1.1%C alloy under high magnetic field

作　　者：宫明龙[1] 刘凤芳[1] 赵骧[2] 左良[2] 

机构地区：[1]东北大学秦皇岛分校资源与材料学院,河北秦皇岛066004 [2]东北大学材料各向异性与织构教育部重点实验室,辽宁沈阳110819

出　　处：《材料热处理学报》2013年第4期100-103,共4页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助项目(50901015;50771026);教育部长江学者和创新团队发展计划项目(IRT0713)

摘　　要：研究了12 T磁场下910℃保温不同时间(5,10,30和60 min)对高纯Fe-1.1%C钢中"反常"组织形貌及宏观硬度的影响。结果表明:强磁场下"反常"组织面积分数随保温时间的延长而减小;这是由于保温时间的延长扩散较充分,析出时二次渗碳体析出较慢所致。宏观硬度随保温时间的延长而增加。在相同奥氏体化保温时间下,强磁场热处理样品与无磁场热处理样品相比,"反常"组织面积分数明显增加,样品宏观硬度值下降。It was investigated that the effect of holding time （5, 10, 30 and 60 min） at 910 ℃ on abnormal microstructure and hardness of a high pure Fe-1. 1% C alloy under 12 T magnetic field. The results show that the area fraction of the abnormal microstructure decreases with the increase of holding time under magnetic field, which is due to the carbon diffusion is promoted with longer holding time leading to a slow precipitation of secondary cementite. Meanwhile, the hardness increases with longer holding time. With the same holding time, the area fraction of abnormal microstructure in the specimens heat treated with 12 T magnetic field is larger than that without magnetic field. However, the hardness of the specimen heat treated with magnetic field is lower.

关 键 词：强磁场 保温时间 Fe-1 1%C合金 “反常”组织 

分 类 号：TG115.5[金属学及工艺—物理冶金]