摘要
低温加热渗氮型取向硅钢二次再结晶完全、磁性能却不高是一种常见的现场质量问题,其成因的判断及问题的解决对降低生产成本至关重要。本文对两组企业生产中存在上述现象的低温渗氮钢的一次再结晶板进行高温退火中断实验,确定其二次再结晶温度及基体晶粒和二次晶粒的取向分布特征,探索其成因。结果表明,磁性能下降的原因是二次晶粒取向度偏差大,主要向{110}<227>取向偏转;其本质是一次晶粒尺寸偏小,二次再结晶温度提前了约50℃;高斯晶粒以外的偏高斯取向晶粒优先形成。两组样品的差异不在于其二次再结晶温度不同,而是二次晶粒的偏差度不同。这种差异又反映出两组样品微小的一次退火组织织构和抑制剂的差异或成分波动性。
It is a frequently observed quality problem for new producers that the low temperature heating and subsequent nitriding grain oriented silicon steel products show a full abnormally grown grain structure but with a low magnetic property and its reason and solution are crucial to reduce production costs.In this work the products with above-mentioned phenomenon in two groups of grain oriented silicon steels were analyzed by determining their corresponding grain orientations in primary recrystallized sheets,in the interrupted samples during secondary recrystallization annealing including matrix grains and secondary grains and detecting their secondary recrystallization temperatures.Results showed that the reason for the decrease in magnetic properties lay in the higher scattering of Goss orientation mainly towards to{110}<227> which was related with a smaller average grain size of primary recrystallized sheets leading to low starting secondary recrystallization temperature by about 50℃.The earliest secondary grains showed large orientation scattering to Goss orientation.The difference in magnetic properties of the two group sheets were not related to their starting secondary recrystallization temperature,but to their degree in orientation scattering,which were ascribed to the slight differences in primary recrystallization textures and inhibitors as well as the turbulence in key elements contents.
作者
杨平
李洋
顾新福
李观军
恽建刚
YANG Ping;LI Yang;GU Xinfu;LI Guanjun;YUN Jiangang(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083?China;Yinyi Scientific and Creative New Materials Limited Company,Ningbo 315204,China)
出处
《电工钢》
2022年第3期1-11,共11页
ELECTRICAL STEEL
基金
国家自然科学基金重点项目(51931002)。
关键词
渗氮型取向硅钢
二次再结晶
织构
磁性能
low temperature heating and nitriding grain oriented silicon steel
secondary recrystallization
texture
magnetic properties
