Transactions of Materials and Heat Treatment

Title：Influence of coiling temperature on microstructure，magnetic properties and surface quality for non-oriented silicon steel

Authors： Li Hui Lu Jiadong Wu Shengjie Yue Chongxiang

Unit： Institute of Research of Iron and Steel Sha-Steel

KeyWords： non-oriented silicon steel coiling temperature hot rolling texture magnetic properties

ClassificationCode：TG142.7

year,vol(issue):pagenumber：2022,47(11):165-171

Abstract：

The influences of different hot rolling coiling temperatures on the microstructure, magnetic properties and surface quality of non-oriented silicon steel were compared and analyzed under industrial production condition. The results show that when coiled at a higher temperature of 700 ℃, the surface layer and core of hot-rolled coil are both recrystallized microstructure, but when coiled at a lower temperature of 650 ℃, the core occurs incompete recrystallization, and the annealed product microstructure is relatively fine. Under the different coiling temperatures, the textures of hot-rolled coil are similar, the core is {001} <110> rotated cubic texture and a small amount of {111} surface texture, and the surface layer is {110} <001> Goss texture and {110} <112> texture and a small amount of {100} and {111} textures. The textures of annealed products are mainly {111} plane textures. When coiled at a lower temperature of 650 ℃, the magnetic induction value of finished product is slightly increased, but the iron loss value is also slightly increased, and the overall magnetic properties are not significantly different. At the same time, the oxide scale on the surface of hot-rolled coil is thinner, and it is easier to clean during pickling. Therefore, in industrial production, on the basis of ensuring that the magnetic properties fluctuate little, the pickling effect and finished surface quality of hot-rolled silicon steel coil can be improved by appropriately decreasing coiling temperature.

Funds：

沙钢集团产品开发项目（IRIS-CR2013）

作者简介：李慧(1987-), 女，博士，高级工程师，E-mail：lihuizyy@126.com；通信作者：岳重祥（1982-），男，博士，研究员级高级工程师，E-mail：chongxiang39@163.com

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