日本研制高强度无取向电工钢的新技术

NEWLY DEVELOPED HIGH-STRENGTH NONORIENTED ELECTRICAL STEEL IN JAPAN

为了适应新能源汽车——电动车（EV）和混合动力电动汽车（HEV）电机对高性能电工钢板的需求，日本住友金属工业有限公司应用位错强化方法，已经成功研制出一种具有高强度、低铁损的无取向电工钢，主要介绍新产品690～780MPa、0．35mm厚的高强度无取向电工钢的磁性能和力学性能都优于980MPa双相高强度钢，并且成本非常低，因此得到新能源电动车（EV）和混合动力电动汽车（HEV）用高效永磁（IPM）电机铁芯的广泛应用。

In order to meet the demand for new energy vehicles--electric vehicle （EV） and hybrid electric vehicle （HEV） motor for high performance non-oriented electrical steel. Non-oriented electrical steel featuring great strength and low core loss has been developed by Sumitomo Metal Industries Ltd.. The strengthening mechanism was mainly applied was dislocation strengthening. This paper introduces a the typical properties of developed steel of 0.35ram 690 and 780 MPa grades both in tensile strength and fatigue strength are superior to that of the 980-MPa grade dual-phase steel which costs could be minimized and have been widely applied in electric vehicle （EV） and hybrid electric vehicle （HEV） with high efficiency permanent magnet （IPM） motor core.