低温HiB钢全流程组织、织构演变及成品磁性能  

Whole Process Microstructure,Texture Evolution of Low-temperature HiB Steel and Its Finished Magnetic Properties

作　　者：李泽超 郭飞虎 时朋召 仇圣桃[1] LI Zechao;GUO Feihu;SHI Pengzhao;QIU Shengtao(National Engineering Research Center of Continuous Casting Technology,Iron and Steel Research Institute Co.,Ltd,Beijing 100081,China;210 Converter Plant,Hunan Valin Lianyuan Iron&Steel Co.Ltd,Loudi 417000,China)

机构地区：[1]钢铁研究总院有限公司连铸技术国家工程研究中心,北京100081 [2]湖南华菱涟源钢铁有限公司210转炉厂,湖南娄底417000

出　　处：《安徽工业大学学报（自然科学版）》2024年第4期432-440,共9页Journal of Anhui University of Technology（Natural Science）

基　　金：江西省重大科研专项(20213AAE01009)。

摘　　要：以低温高磁感取向硅钢(HiB钢)全流程生产过程中各工序段的热轧板、常化板、冷轧板、脱碳渗氮板和成品板为研究对象,采用光学显微镜、X射线衍射仪(XRD)和电子背散射衍射仪(EBSD)表征其组织与织构,分析低温HiB钢生产全流程组织与织构的演变规律,探究其对低温HiB钢成品板磁性能的影响。结果表明:低温HiB钢热轧板、常化板的组织和织构在厚度方向上存在显著差异,Goss晶粒起源于热轧板1/4次表层,热轧板与常化板的织构种类相同,仅织构强度存在差异,中心层主要织构为{118}<110>;冷轧板为纤维状变形组织,形成了较强的α纤维织构和γ纤维织构,{111}<110>的织构强度最高,为14.4;脱碳渗氮板以α^(*)纤维和γ纤维织构为主,分别集中在{114}<481>和{111}<112>处,Goss晶粒周围主要为{114}<481>和{111}<112>取向晶粒,尺寸小于其他晶粒,不具有数量和生长优势。磁性能为B_(8)≥1.89 T,P_(1.7/50)≤0.97 W/kg的成品板Goss晶粒发展完善,晶粒尺寸达到厘米级,晶界呈锯齿状,Goss织构锋锐;磁性能为B_(8)=1.83 T,P_(1.7/50)=1.27 W/kg的成品板中多为异常长大的非高斯与高斯位向偏离角较大的取向晶粒,且晶界光滑;大部分晶粒未发生二次再结晶的成品板组织为细晶组织,磁性能B_(8)=1.77 T,P_(1.7/50)=1.48 W/kg。Taking the hot-rolled sheet,normalized sheet,cold-rolled sheet,decarburized and nitrided sheet and finished sheet of low-temperature HiB steel in the whole production process as the research object,the microstructure and texture of low-temperature HiB steel were characterized by optical microscopy,X ray diffractomer(XRD)and electron back scatter diffraction(EBSD).The evolution law of microstructure and texture throughout the production process of low-temperature HiB steel was analyzed to explore its impact on the magnetic properties of the finished sheet.The results show that the microstructure and texture of hot-rolled sheet and normalization-annealed sheet of low-temperature HiB steel are significantly different in thickness direction.Goss grain originates from the 1/4 surface layer of hot-rolled sheet,and the texture types of hot-rolled sheet and normalization-annealed sheet are the same,with only differences in the texture strength,and the main texture of the center layer is{118}<110>.The cold-rolled sheet has a fibrous deformation structure,forming strongαfiber texture andγfiber texture,and the texture strength of{111}<110>is the highest,at 14.4.The decarburized and nitrided sheet is mainly composed ofα^(*)fiber andγfiber textures,which are{114}<481>and{111}<112>,respectively.Goss grains are mainly surrounded by{114}<481>and{111}<112>oriented grains,which are smaller in size than other grains and do no numerical and growth advantage.The finished sheet with magnetic properties of B_(8)≥1.89 T and P_(1.7/50)≤0.97 W/kg has well-developed Goss grains,with grain size reaching centimeter level,serrated grain boundaries,and Goss texture is sharp.The finished sheet with magnetic properties of B_(8)=1.83 T and P_(1.7/50)=1.27 W/kg is mostly composed of abnormally grown non-Gaussian and Gaussian oriented grains with large deviation angles,and the grain boundaries are smooth.The microstructure of the finished plate without secondary recrystallization of most grains is fine grain structure,with magnetic properti

关 键 词：高磁感 取向硅钢 微观组织 织构 磁性能 新能源 

分 类 号：TG142.77[一般工业技术—材料科学与工程]