单道次热轧对Fe-1.5Si硅钢氧化层形貌的影响  

Effects of Single-Pass Hot Rolling on Oxide Scales Morphology of Fe-1.5Si Silicon Steels

作　　者：刘小江[1] 曹光明[1] 何永全[1] 刘振宇[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2013年第12期1730-1733,共4页Journal of Northeastern University(Natural Science)

基　　金："十二五"国家科技支撑计划项目(2011BAE13B04);国家自然科学基金资助项目(51204047)

摘　　要：将Fe-1．5Si硅钢试样分别在1000～1200℃空气条件下氧化30min，观察发现在1000℃和1100℃时，氧化层与基体界面处存在硅酸亚铁，而当温度为1200℃时，硅酸亚铁不但存在于界面处，同时也存在于氧化层中．将各温度F得到的带有氧化层的试样进行单道次热轧试验，压下率分别为10％和30％，发现1000℃和1100℃时，较高的压下率使氧化层破碎更加严重，但是单道次热轧未能改变氧化层的结构；当温度为1200℃时，由于液态的硅酸亚铁的出现，单道次热轧能够将界面处的液化的硅酸亚铁层挤压到氧化层中，消除了硅酸亚铁层的钉扎基体的效应，改善了氧化层与基体界面的平直度．Specimens of Fe-1.5 Si silicon steel were oxidized at 1 000 - 1 200 ℃in air for 30 min. At 1 000 ℃ and l 100 ℃ fayalite was observed at the scale/substrate interface. While at 1 200 ℃ fayalite was found both at the scale/substrate interface and at the outer oxide layer. Then after the single-pass hot rolling process, with the compression ratio of 10% and 30% , it was found that at 1 000 ℃ and 1 100 ℃, higher compression rate accelerated the broken of the scale layers, but the scale structure was not affected by the hot rolling process, while for the specimens oxidized at 1 200 ℃ because of the formation of liquefied fayalite, the fayalite was squeezed into the outer oxide layer in the single-pass hot rolling. Pinning effects were weakened at the scale/substrate interface, and flatness of the interface between the scales and the substrate was improved.

关 键 词：氧化层 硅钢 热轧 硅酸亚铁 形貌 

分 类 号：TG142.77[一般工业技术—材料科学与工程]