Cu对高强高效无取向电工钢力学性能的影响  

Effect of Cu on the mechanical properties of non-oriented electrical steel with high strength and efficiency

作　　者：裴英豪[1] 王永强 李娜 丁西安 夏雪兰[1] PEI Yinghao;WANG Yongqiang;LI Na;DING Xi'an;XIA Xuelan(Technology Center,Maanshan Iron and Steel Co.,Ltd.,Maanshan 243000,Anhui,China;School of Materials Science and Engineering,Anhui University of Technology,Maanshan 243002,Anhui,China;School of Metallurgical Engineering,Anhui University of Technology,Maanshan 243002,Anhui,China)

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000 [2]安徽工业大学材料科学与工程学院,安徽马鞍山243032 [3]安徽工业大学冶金工程学院,安徽马鞍山243032

出　　处：《金属功能材料》2023年第4期49-58,共10页Metallic Functional Materials

基　　金：安徽省重点研究与开发计划项目(202104a05020021);国家自然科学基金(51604002);教育部重点实验室开放基金(GFST2020KF10)。

摘　　要：如何在保证磁性能的前提下获得高强度是驱动电机用高性能无取向电工钢研发需要解决的关键问题之一。利用Cu的析出强化是一种理想的手段,但是目前Cu对无取向电工钢的力学性能的影响研究尚不系统深入。设计并制备了含Cu高强高效无取向电工钢,利用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、万能电子拉伸试验机等系统地研究了Cu对新型高强度高效率无取向电工钢力学性能的影响。结果表明,随着Cu含量的增加,实验钢热轧板、常化板和退火板样品的屈服强度和抗拉强度均增加,而伸长率整体上呈逐渐下降趋势。Cu在样品中主要以纳米尺寸富Cu析出相的形式析出,一方面阻碍位错运动,发挥沉淀强化的作用;同时对磁性能的不利影响较小。Cu含量越高,富Cu析出相数量越多,强化效果越显著。适量的Cu(质量分数为1.24%)不仅使实验钢强度明显提升而且还可保持一定的塑性。How to obtain high strength of non-oriented electrical steel on the base of magnetic properties is one of the key topics.It is maybe one of optimal methods of strengthening by Cu precipitates,however,the research on the effect of Cu on mechanical properties of non-oriented electrical steel is not systematic and in-depth.The high strength and efficiency non-oriented electrical steel containing Cu element was designed and achieved.The role of Cu element on the mechanical properties of a new non-oriented electrical steel with high strength and efficient magnetic properties was investigated by the means of optical microscope(OM),scanning electron microscope(SEM),transmission electron microscope(TEM)and tensile testing machine.The results show that yield strength(YS)and ultimate tensile strength(UTS)of hot rolling,normalization and annealing specimens increased with the increasing of Cu containing,while elongation of those specimens after fracture decreased.Nano Cu-rich precipitated particles will form in experimental non-oriented steel specimens and inhibit dislocations moving and sliding which inducing improvement of YS and UTS of steel specimens.At the same time,the nano Cu-rich precipitated particles not brought magnetic properties reduction obviously.The higher the Cu element content in steel,the more the Cu-rich precipitated particles,so the higher the strength obtained.The higher strength and elongation can be achieved simultaneously in specimens with appropriate Cu content.Although the highest strength can be obtained in specimens with maximum Cu element,the ductility of them is very poor.

关 键 词：高强高效无取向电工钢 铜 力学性能 富Cu析出相 

分 类 号：TG142.1[一般工业技术—材料科学与工程]