摘要
研究了机械剪板加工和激光切割两种加工方式对高牌号无取向电工钢铁损的影响。结果表明:无论20组平行数据对比,还是单组样品在不同励磁条件下对比,激光切割样条的矫顽力和铁损均高于机械剪板加工。通过电子背散射衍射(EBSD)技术对晶粒内应力分析发现,剪板加工样条切断面存在应力集中区,而激光切割样条切断面附近则无明显应力集中区。但通过切断面能谱仪(EDS)分析发现,激光切割样条在切断面处包裹一层厚度为1μm的氧化层。该氧化层导致激光切割样条在磁感应强度为1.0 T条件下,磁滞损耗增加,且随加载频率的升高,影响呈放大趋势。但当磁感应强度增加至1.5 T后,氧化层对磁滞损耗的影响降低,反常损耗影响增加。
Effects of two sample processing methods,mechanical punching and laser cutting,on iron loss of high-grade non oriented electrical steel were studied.The results show that the coercivity and iron loss of laser cutting samples are higher than those of mechanical punching,regardless of the comparison of 20 groups of parallel data or a single group of samples under different excitation conditions.Through the analysis of the internal stress in the grain by electron backscatter diffraction(EBSD)technique,it is found that there is a stress concentration area in the cutting section of punching sample,while there is no obvious stress concentration area near the cutting section of laser cutting sample.However,through the energy dispersive spectrometer(EDS)analysis of the cutting surface,it is found that the laser cutting sample wraps an oxide layer with thickness of 1μm.The oxide layer causes the hysteresis loss of laser cutting sample to increase when the magnetic induction intensity is 1.0 T,and the influence increases with the increase of loading frequency.However,when the magnetic induction intensity increases to 1.5 T,the influence of oxide layer on hysteresis loss decreases and the influence of abnormal loss increases.
作者
吴圣杰
金传伟
钱红伟
詹东方
WU Sheng-jie;JIN Chuan-wei;QIAN Hong-wei;ZHAN Dong-fang(Institute of Research of Iron and Steel,Shagang,Jiangsu Province,Zhangjiagang 215600,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2022年第9期147-154,共8页
Transactions of Materials and Heat Treatment
关键词
无取向电工钢
激光切割
磁滞损耗
反常损耗
non-oriented electrical steel
laser cutting
hysteresis loss
abnormal loss
