真空预热处理对氮气保护高温退火取向硅钢30Q140冷轧板组织和磁性能的影响  

Effect of Vacuum Conditioning Heat Treatment on Structure and Magnetic Properties of High Temperature Annealing Oriented Silicon Steel 30Q140 Cold Rolled Sheet by Nitrogen Protection

作　　者：张辉 付勇军 杨玲 张静 李莉 Zhang Hui;Fu Yongjun;Yang Ling;Zhang Jing;Li Li(School of Materials Science and Engineering,Hubei Polytechnic University,Huangshi 435000;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093;Huangshi Product Quality Supervision and Inspection Institute,Huangshi 435000;Technology Center Angang Steel Company Lim让ed,Anshan 114021)

机构地区：[1]湖北理工学院材料科学与工程学院,黄石435000 [2]昆明理工大学冶金与能源工程学院,昆明650093 [3]黄石市产品质量监督检验所,黄石435000 [4]鞍钢股份有限公司技术中心,鞍山114021

出　　处：《特殊钢》2021年第5期60-64,共5页Special Steel

基　　金：湖北省自然基金面上项目(2018CFB759);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)资助。

摘　　要：研究了真空预热处理温度(800、825、850、875、900℃)对取向硅钢30Q140(/%:0.035C,3.25Si,0.08Mn,0.010P,0.025S,0.023Al,0.0065N)0.3 mm冷轧板初次再结晶组织、二次再结晶组织及磁性能的影响。结果表明,真空预热处理采用快速升温方式时,利用涂覆在钢板表面MgO涂层中Mg(OH)_(2)的分解水可以实现取向硅钢部分脱C的目的。真空预热处理温度增加,真空预热处理+1200℃高温退火30Q140钢平均晶粒直径先变大后变小,磁性能先变好后变差。二次再结晶组织最完善且磁性能最优的真空预热处理温度为850℃。The effect of vacuum conditioning heat treatment temperature(800,825,850,875,900 ℃) on the primary recrystallization microstructure,secondary recrystallization structure and magnetic properties of 0.3 mm cold-rolled sheel of grain-oriented silicon steel 30 Q140(/%:0.035 C,3.25 Si,0.08 Mn,0.010 P,0.025 S,0.023 Al,0.006 5 N) is studied.The results show that the partial decarburization of grain-oriented silicon steel can be achieved by using the decomposition water of Mg(OH)2 in MgO coating on the steel sheet surface in rapid heating in vacuum conditioning heat treatment.With increasing vacuum conditioning heat treatment temperature,the average grain diameter of vacuum conditioning heat treatment temperature+1 200 ℃ high-temperature annealing steel 30 Q140 first increases and then decreases,and the magnetic properties first become better and then worse.The vacuum conditioning heat treatment temperature of the most perfect secondary recrystallization structure and the best magnetic property of steel is 850℃.

关 键 词：取向硅钢30Q140 金相组织 再结晶 磁性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG156[金属学及工艺—金属材料]