高温退火气氛N_2含量对低温加热取向硅钢薄板磁性能的影响  

Effect of N_2 Content in High-Temperature Annealing Atmosphere on Magnetic Properties of Low-Temperature Heating Oriented Silicon Steel Sheet

作　　者：谢力[1] 林媛[2] 张文康[3] 侯鹏飞[2] 马光 杨富尧 

机构地区：[1]山西太钢不锈钢股份有限公司,太原030003 [2]山西太钢不锈钢股份有限公司技术中心,太原030003 [3]山西太钢不锈钢股份有限公司冷轧硅钢厂,太原030003 [4]国网智能电网研究院,北京102211

出　　处：《特殊钢》2017年第2期67-70,共4页Special Steel

基　　金：国家电网公司科技项目资助(项目编号SGRI-WD-71-13-002)

摘　　要：试验的取向硅钢冷轧板(/%:0.050C,3.20Si,0.15Mn,0.003S,0.023Als,0.009 0N)的轧制流程为220 mm连铸板坯-热轧至1.8 mm饭-l 120℃2.4 min常化-冷轧至0.23 mm和0.18 mm板,再经850℃5 min脱碳和700℃2 min渗氮处理,处理后钢板C含量为0.002 0%,N含量为0.018 0%、试验研究了600~1 200℃,17℃/h退火升温过程中,气氛中N_2比例(25%,50%,75%,90%)对0.23 mm和0.18 mm冷轧薄板低温加热取向硅钢磁性能的影响。结果表明,600~1 200℃升温区间,采用50%N_2和75%N_2时,0.23 mm薄板低温加热取向硅钢具有较好的磁性能,其铁损为0.9 W/kg;采用75%N_2时,0.18 mm薄板低温加热取向硅钢磁性能最佳,其铁损为0.8W/kg,采用25%N,时,0.18 mm薄板铁损为1.63 W/kg,磁性能最差。The rolling flow sheet for tested oriented silicon steel cold-rolled sheet （/% ： 0. 050C, 3.20Si, 0. 15Mn, 0. 003S, 0. 023A1s, 0. 009 ON） is 220 mm cast slab-hot rolled to 1.8 mm plate- normalized at 1 120 ℃ for 2.4 min- cold- rolled to 0. 23 mm and 0. 18 mm sheet, then decarburized at 850 ℃ for 5 min and nitriding at 700 ℃ for 2 min, after trea- ted the C content in sheet is 0. 002 0% and the N content in sheet is 0.018 0%. The effect of N2 content （25% , 50% , 75% and 90% ） in atmosphere during 17 ℃/h annealing heating up period at 600 - 1 200 ℃ on magnetic performance of 0. 23 mm and 0. 18 mm cold-rolled sheet of low-temperature heating oriented silicon steel has been tested and studied. Re- sults show that during 600 - 1 200 ℃ heating up period with using 50% N2 and 75% N2 atmosphere the 0. 23 mm sheet of low-temperature heating oriented silicon steel has better magnetic performance, its iron loss is 0. 9 W/kg, and with using 75% N2 atmosphere the 0. 18 mm sheet of low-temperature heating oriented silicon steel has optimum magnetic performance, its iron loss is 0. 8 W/kg, and with using 25% N2 the magnetic performance of 0. 18 mm sheet is poorest i. e. iron loss 1.63 W/kg.

关 键 词：低温加热取向硅钢 冷轧薄板 高温退火气氛 磁性能 

分 类 号：TM275[一般工业技术—材料科学与工程] TG161[电气工程—电工理论与新技术]