低温普通取向硅钢高温退火过程中高斯晶粒的演变  

Evolution of Goss Texture in Annealing Process at High Temperature of CGO Silicon Steel with Slab Reheating at Low Temperature

作　　者：樊立峰[1,2] 凌晨[1,2] 付兵[1,2] 项利[1,2] 唐广波[3] 仇圣桃[1,2] 

机构地区：[1]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081 [2]钢铁研究总院连铸技术国家工程研究中心,北京100081 [3]钢铁研究总院特殊钢研究所,北京100081

出　　处：《西安交通大学学报》2013年第11期81-86,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(50934009)

摘　　要：对低温加热工艺生产的普通取向（common grain-oriented,CGO）硅钢的高温退火过程进行了中断实验,材料为含3.0％ Si、0.5％ Cu、0.009 8％ S（均为质量分数）的以Cu2S为主抑制剂的普通取向CGO钢.原始板坯厚度为230 mm,于1 200℃均热后经4道次粗轧、7道次精轧至2.3 mm;热轧板采用两次冷轧法轧至0.3 mm,中间完全脱碳退火,最后于1 200℃高温退火.最后样品的磁性能：铁损P17/50为1.182 W/kg,磁感应强度B8为1.897 T.借助配有EDAX OIM电子背散射衍射（EBSD）系统的ZEISS SUPRA 55VP扫描电子显微镜,对高温退火过程中高斯晶粒的演变进行了研究,结果表明：升温过程中晶粒尺寸增长缓慢,650℃时取向分布函数（ODF）图出现高斯织构组分,但强度很弱,高斯晶粒偏离角小于9°;950℃时高斯晶粒平均生长速度超过其他晶粒;950～1 000℃时高斯晶粒异常长大,偏离角降至约3°;在950℃之前高斯取向晶粒相比于其他晶粒没有尺寸优势.The high-temperature annealing process of common grain-oriented （CGO） silicon steel was investigated by interrupting test.The samples were rolled from CGO silicon steel slab under low reheating temperature.The CGO silicon steel,taking Cu2S as the main inhibitor,contains 3.0％Si,0.5％Cu,and 0.0098％S.The original casting slab is 230 mm in thickness.After 1 200 ℃ reheating,four-pass rough rolling and seven-pass finish rolling were conducted to make the thickness of the slab get to 2.3 mm.Then the hot rolled plate was cold-rolled twice to 0.3 mm with intermediate decarburizing annealing and final 1 200 ℃ annealing.The final iron loss P17/50 is 1.182 W/kg,and magnetic remanence B8 reaches 1.897 T.The evolution of Goss texture in the high-temperature annealing process was analyzed by ZEISS SUPRA 55VP SEM with EBSD system.The results show that：Grains grow up slowly with the increase in temperature; Goss texture appears in ODF of the sample annealed at 650 ℃,its intensity is very weak and the deviation angles of Goss grains are smaller than 9°; The average growth rate of Goss grains is higher than that of other grains at 950 ℃ ; Goss grains grow abnormally within 950～1 000 ℃,and the deviation angles decrease to about 3°; Goss grains have no size advantage before abnormal growth.

关 键 词：取向硅钢 高斯织构 二次再结晶 晶粒尺寸 

分 类 号：TG142.77[一般工业技术—材料科学与工程]