残余碳对取向硅钢初次和二次再结晶的影响

doi:10.11901/1005.3093.2019.346

材料研究学报

2020, Vol. 34

Issue (2): 118-124 DOI: 10.11901/1005.3093.2019.346

研究论文

本期目录 | 过刊浏览

残余碳对取向硅钢初次和二次再结晶的影响

付勇军,雷家柳(

),廖庆玲,赵栋楠,张玉成

湖北理工学院材料科学与工程学院黄石 435000

Effect of Residual Carbon on Primary and Secondary Recrystallization of Grain-oriented Silicon Steel

FU Yongjun,LEI Jialiu(

),LIAO Qingling,ZHAO Dongnan,ZHANG Yucheng

School of Materials Science and Engineering, Hubei Polytechnic University, Huangshi 435000，China

引用本文:

付勇军,雷家柳,廖庆玲,赵栋楠,张玉成. 残余碳对取向硅钢初次和二次再结晶的影响[J]. 材料研究学报, 2020, 34(2): 118-124.
Yongjun FU, Jialiu LEI, Qingling LIAO, Dongnan ZHAO, Yucheng ZHANG. Effect of Residual Carbon on Primary and Secondary Recrystallization of Grain-oriented Silicon Steel[J]. Chinese Journal of Materials Research, 2020, 34(2): 118-124.

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摘要:

研究了脱碳退火样品中的残余碳对取向硅钢初次和二次再结晶的组织和磁性能的影响。结果表明：随着脱碳退火样品中残余碳含量的提高，初次再结晶的平均晶粒尺寸减小，表层和中心层的晶粒尺寸差增大；初次再结晶的强{111}<110>或{111}<112>织构向强{112}<110>织构转变，部分1/4层的Goss晶粒或{111}<112>晶粒转变为其他取向的晶粒；残余碳含量超过0.0200%后，高温退火样品二次再结晶不完善，磁性能较差。相变是导致上述现象的主要原因。

关键词 ：金属材料, 取向硅钢, 脱碳退火, 碳含量, 磁性能, 织构

Abstract：

The effect of residual carbon on the microstructure of the primary and secondary recrystallization of the grain-oriented silicon steel was investigated, whereas, the carbon content of the steel was controlled via varying the steam amount in the gas mixture 25%H₂+75%N₂ for the annealing process. The results show that the average grain size of primary recrystallization decreased and the grain size difference between the surface portion and the center portion increase with the increase of residual carbon content in the steel subjected to decarburization annealing. The texture of primary recrystallization changed from strong {111}<110> or {111}<112> into strong {112}<110> , while the texture of some Goss grains in 1/4 layer or {111}<112> grains was also altered. The steel subjected to high temperature annealing had imperfect secondary recrystallization and bad magnetic properties when the carbon content in the sample was higher than 0.0200%. Phase transformation is the main reason that led to the above phenomena.

Key words： metallic materials grain-oriented silicon steel decarburization annealing carbon content magnetic properties texture

收稿日期: 2019-07-15

ZTFLH:

TG142.77

基金资助:国家自然科学基金(51704105);国家高技术研究发展计划项目(2012AA03A505);湖北省中央引导地方科技发展专项(2019ZYYD006);湖北省教育厅科学技术研究计划指导性项目(B2019227);湖北理工学院校级科研项目(18xjz05R)

作者简介: 付勇军，男，1977年生，博士，高级工程师

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https://www.cjmr.org/CN/10.11901/1005.3093.2019.346 或 https://www.cjmr.org/CN/Y2020/V34/I2/118

表1 取向硅钢冷轧样品主要元素的含量

图1 取向硅钢的脱碳退火示意图

图2 高温退火工艺方案

图3 在不同水浴温度下取向硅钢脱碳退火样品的脱碳量和残余碳含量

图4 不同残余碳含量取向硅钢脱碳退火样品的金相组织

图5 不同残余碳含量取向硅钢脱碳退火样品的平均晶粒尺寸

图6 不同残余碳含量取向硅钢高温退火样品的金相组织

图7 不同残余碳含量取向硅钢的二次再结晶率和晶粒尺寸

图8 残余碳含量对高温退火取向硅钢样品磁性能的影响

图9 取向硅钢中间退火后的金相组织

图10 不同残余碳含量取向硅钢脱碳退火样品的EBSD取向成像图

图11 退火温度对C=0.0265%样品中γ相含量的影响

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