Hi-B电工钢长条状二次再结晶晶粒的形成(英文)  

Formation of elongated secondarily recrystallizedgrains in Hi-B electrical steels

作　　者：钱浩[1] 杨平[1] 汪玲玲[1] 毛卫民[1] 

机构地区：[1]北京科技大学材料学院,北京100083

出　　处：《中国体视学与图像分析》2011年第4期367-372,共6页Chinese Journal of Stereology and Image Analysis

基　　金：supported by the Chinese National Natural Science Foundation(51071024)~~

摘　　要：热轧是Hi-B电工钢生产中控制织构及析出的最重要环节之一。研究中观察到,与大生产热轧板相比,实验室热轧很容易导致二次再结晶退火后出现沿轧向生长很长的长条晶。为澄清其形成机制,本文对比研究了大生产和实验室热轧及退火后样品中的组织形貌、织构及析出。结果表明,初始粗大晶粒、低的热轧压下量及低的终轧温度导致析出提前发生并沿轧向分布造成二次再结晶退火后长条晶粒及细小的线晶的出现。Hot rolling is one of the most important steps of controlling texture and precipitation in the production of Hi-B electrical steels. It is observed that extremely elongated secondarily recrystallized grains present in laboratory-scale hot rolled sheets rather than in industrially hot roiled sheets. To understand the underlying mechanism, this work investigated the microstructures, the precipitates and the grain orientations of hot rolled plates and annealed sheets in both laboratory and industrially processed samples. The results show that due to the coarse original grains, the low total reduction ratio and the low finishing rolling temperature, early precipitation, distribution of precipitates along the roiling direction （RD） and the large grains in ihe group along RD in＇ primarily annealed samples lead to the formation of elongated grains together with small streak grains after secondary recrystallization.

关 键 词：长条晶粒 Hi-B电工钢 热轧 取向 析出 

分 类 号：TG111.7[金属学及工艺—物理冶金]