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李泽超,郭飞虎,时朋召,等. 低温HiB钢全流程组织、织构演变及成品磁性能[J]. 安徽工业大学学报(自然科学版),2024,41(4):1-9. doi: 10.12415/j.issn.1671-7872.24073
引用本文: 李泽超,郭飞虎,时朋召,等. 低温HiB钢全流程组织、织构演变及成品磁性能[J]. 安徽工业大学学报(自然科学版),2024,41(4):1-9. doi: 10.12415/j.issn.1671-7872.24073
LI Zechao, GUO Feihu, SHI Pengzhao, QIAO Jialong, QIU Shengtao. Microstructure, Texture Evolution and Magnetic Properties of the Whole Process Low-temperature HiB Steel[J]. Journal of Anhui University of Technology(Natural Science). DOI: 10.12415/j.issn.1671-7872.24073
Citation: LI Zechao, GUO Feihu, SHI Pengzhao, QIAO Jialong, QIU Shengtao. Microstructure, Texture Evolution and Magnetic Properties of the Whole Process Low-temperature HiB Steel[J]. Journal of Anhui University of Technology(Natural Science). DOI: 10.12415/j.issn.1671-7872.24073

低温HiB钢全流程组织、织构演变及成品磁性能

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

  • 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)方法,表征其组织与织构,分析低温HiB钢生产全流程中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*纤维织构、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B8≥1.89 T,P1.7/50≤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B8=1.83 T,P1.7/50=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B8=1.77 T,P1.7/50=1.48 W/kg。

     

    Abstract: 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), and the evolution law of microstructure and texture was analyzed to explore its impact on the magnetic properties of low-temperature HiB steel 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 a strong α fiber texture and γ fiber texture, and the texture strength of 111<110> is the highest, at 14.4. The decarburized and nitrided sheet is mainly composed of α* fiber texture and γ fiber texture, which are 114<481> and 111<112>,respectively. The grains around the Goss grain are mainly 114<481> and 111<112> oriented grains, with smaller sizes than other grains and no numerical and growth advantages. The finished sheet with magnetic properties B8≥1.89 T, P1.7/50≤0.97 W/kg has well-developed Goss grains,with grain sizes reaching centimeter level and serrated grain boundaries, and Goss texture is sharp. In the finished sheet with magnetic properties B8=1.83 T, P1.7/50=1.27 W/kg, there are mostly non-Goss grains and oriented grains with large deviation angles from Goss orientation with abnormal growth, and grain boundaries are smooth. The finished sheet microstructure without secondary recrystallization are fine grains, with magnetic properties B8=1.77 T, P1.7/50=1.48 W/kg.

     

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