Cu对含Ce高强高效无取向硅钢磁性能的影响  

Effect of Cu on the Magnetic Properties of High Strength and Efficiency Non-oriented Silicon Steel Containing Ce Element

作　　者：李娜 丁西安[3] 王永强 陆勤阳[1] 郑成思 LI Na;DING Xi’an;WANG Yongqiang;LU Qinyang;ZHENG Chengsi(School of Metallurgical Engineering,Anhui University of Technology,Ma’anshan 243002,Anhui,China;Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials,Ministry of Education,Anhui University of Technology,Ma’anshan 243002,Anhui,China;School of Materials Science and Engineering,Anhui University of Technology,Ma’anshan 243002,Anhui,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243002 [2]安徽工业大学先进金属材料绿色制备与表面技术教育部重点实验室,安徽马鞍山243002 [3]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《材料导报》2024年第6期172-178,共7页Materials Reports

基　　金：教育部重点实验室开放基金(GFST2020KF10);国家自然科学基金(51604002)。

摘　　要：无取向硅钢作为新能源汽车电机系统的核心部件材料,要求其磁性能和力学性能同时优异,但两者往往不能兼顾。如何获得强度和磁性能的良好匹配是高性能无取向硅钢需要解决的关键问题之一。对此,本工作通过Cu、Ce合金化研制了高强高效无取向硅钢样品,但是,目前Cu在硅钢中的作用尤其是对磁性能的影响机理尚不十分明确。因此,本工作采用光学显微镜、扫描电镜、背散射电子衍射和透射电镜等方法研究了Cu对含Ce高强高效无取向硅钢磁性能的影响及机理。结果表明,适量Cu的添加在显著提高强度的情况下同时降低高频铁损,较多Cu的添加使磁感降低、铁损升高。这主要是因为,适量的Cu以富Cu相析出,具有尺寸小、分布分散等特点,一方面促使再结晶的发生,提高晶粒均匀性,并且高温再结晶退火过程中Cu以固溶形式存在不会明显阻碍晶粒长大,对磁性能有利;另一方面促使有利织构的产生,抑制不利织构出现,提高磁感,从而在一定程度上抵消富Cu析出相阻碍磁畴转动对磁性能的不利影响。Cu含量较高时,富Cu析出相不仅尺寸较大,而且形态呈长条状或短棒状,恶化了磁性能。Magnetic and mechanical property are the two most important properties of non-oriented silicon steel which as the core component material of motor.However,there is often mutually exclusive relationship between mechanical properties and magnetic properties.The one of most key problems for the development of high-performance non-orientated silicon steels is how to obtain the comprehensive properties of high strength,high magnetic induction and low iron loss simultaneously.On the base of our previous works,a kind of high strength and efficiency non-orientated silicon steel was achieved by Cu and Ce alloying.This steel present good magnetic properties and outstanding strength,but the mechanism of Cu in this steel especially on the effect of magnetic properties is not clearly.So,in this work,the effect of Cu element on the magnetic properties of high strength and efficiency non-oriented silicon steel containing Ce was investigated by the methods of optical microscope,scanning electron microscope,electron back-scattered diffraction and transmission electron microscope,etc.The results show that there is reduction of high-frequency iron loss in non-orientated silicon steel with significant high strength by appropriate content of Cu addition.While,magnetic induction was reduced and iron loss was increased when adding more Cu element in steel.Cu-rich precipitates characterized by fine,spherical(ellipsoidal)and dispersed will precipitate in hot-rolled plate with appropriate Cu content.These precipitates will hinder dislocation moving,bring more strain energy and provide more higher driving force of recrystallization nucleation.On one hand,the recrystallization was promoted and grain uniformity was improved.Moreover,the grain growth was not significantly impeded during high temperature recrystallized annealing due to the solid solution of Cu element.These factors are beneficial to the magnetic properties.On the other hand,the formation of favorable textures was promoted and unfavorable textures forming was suppressed,which l

关 键 词：CU 高强高效无取向硅钢 组织 织构 磁性能 

分 类 号：TG142.77[一般工业技术—材料科学与工程]