Nb含量对取向硅钢抑制剂析出行为和组织演变的影响  

Effect of Nb content on inhibitor precipiation behaviour and microstructural evolution of grain-oriented silicon steel

作　　者：肖颖 朱诚意[1,2] 刘玉龙 高洋 郭小龙 李光强[1,2] Xiao Ying;Zhu Chengyi;Liu Yulong;Gao Yang;Guo Xiaolong;Li Guangqiang(State Key Laboratory of Refractories and Metallurgy,Wuhan 430081,China;Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan 430081,China;Wuhan Branch of Baosteel Central Research Institute(R&D Center of Wuhan Iron&Steel Co.,Ltd.),Wuhan 430080,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [3]宝钢股份中央研究院武汉分院武钢有限技术中心,湖北武汉430080

出　　处：《武汉科技大学学报》2023年第1期1-9,共9页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金资助项目(51674180).

摘　　要：本文研究了在未渗氮工序下,Nb含量对取向硅钢抑制剂析出行为、初次再结晶组织、织构演变以及成品板磁性能的影响。结果表明,Nb含量分别为0.028%和0.050%的取向硅钢初次再结晶试样中抑制剂类型均以Nb(C,N)为主,析出物数量密度依次为8.23×10^(5)、13.51×10^(5)个/mm^(2),析出物平均尺寸分别为44、35 nm;两种钢初次再结晶试样的平均晶粒尺寸相差不大,分别为11、12μm,主要织构类型均为{114}<418>、{111}<112>和{111}<110>织构。当Nb含量由0.028%增至0.050%,钢中抑制剂数量密度增加、尺寸减小,初次再结晶组织均匀性变差,有利织构含量降低,经高温退火后,0.050%Nb取向硅钢二次再结晶不完善,组织更细小,磁性能相对较差。In this paper,the effects of Nb content on the precipitation behaviour of inhibitors,primary recrystalline microstructure,texture evolution and magnetic properties of grain-oriented silicon steels without nitriding treatment were investigated.The results show that Nb(C,N)is the main type of inhibitor in the primary recrystallization samples of two Nb-bearing steels.The number densities of precipitates in 0.028%Nb-containing and 0.050%Nb-containing steels are 8.23×10^(5) and 13.51×10^(5) pcs/mm^(2),with average size of 44 nm and 35 nm respectively.The average primary recrystallized grain sizes of two steels are close,which are 11μm and 12μm respectively,and the main texture types are{114}<418>、{111}<112>and{111}<110>.As Nb content increases from 0.028%to 0.050%,the number density of inhibitors increases,the average size of inhibitors decreases,the uniformity of primary recrystallization microstructure deteriorates,and the favorable texture content decreases.After high-temperature annealing,the obtained secondary recrystallization microstructure of 0.050%Nb-containing steel is imperfect with finer grain size,which leads to undesirable magnetic properties.

关 键 词：取向硅钢 NB含量 抑制剂 初次再结晶 微观组织 织构 磁性能 

分 类 号：TG142.7[一般工业技术—材料科学与工程]