冷轧压下率对Fe-3% Si低温取向硅钢组织的影响  

Effect of Cold Rolled Reduction on Microstructure of Fe-3% Si Low Temperature-oriented Silicon Steel

作　　者：侯冰[1] 冯运莉[1] 刘琳琳[1] 

机构地区：[1]河北联合大学现代冶金技术重点实验室,河北唐山063009

出　　处：《热加工工艺》2015年第4期39-43,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51274083)

摘　　要：对低温Fe-3%Si取向硅钢在二次冷轧工艺中不同冷轧压下率下的显微组织进行了分析。结果表明,当第一次冷轧总压下率为42%和52%时,冷轧板显微组织形变度小,冷轧板中的储存能小,再结晶驱动力小,使中间退火后得到的再结晶晶粒粗大,粗大的晶粒遗传给第二次冷轧工艺,不利于高温退火过程中二次再结晶晶粒长大而获得粗大的成品晶粒;当第一次冷轧总压下率为61%和71%时,冷轧板显微组织形变严重,晶粒内畸变能高,冷轧板中的储存能大,再结晶的驱动力大,使中间退火后得到的再结晶晶粒变细,有利于高温退火中二次再结晶晶粒吞并初次晶粒而长大,获得粗大的成品晶粒;当第一次冷轧总压下率为81%时,冷轧板显微组织形变度过大,使中间退火后再结晶晶粒出现二次再结晶现象,晶粒异常长大,显微组织不均匀,不能获得满意的成品晶粒。The microstructure of low-temperature Fe-3% Si grain oriented silicon steel under different cold rolling reduction ratio in the cold rolling process was analyzed. The results show that when the first cold rolling reduction rate is 42%and 52%, the microstructure deformation of the cold-rolled sheet is small, the stored energy in the cold rolled sheet is small,and the driving force for recrystallization becomes weak, then the recrystallization grains in the intermediate annealing become coarse, and the coarse grains inheriting to the second cold rolling are not conductive to growth during annealing at high temperature. When the first cold rolling reduction rate is 61% and 71%, the microstructure deformation of the cold-rolled sheet is large, the stored energy in the cold rolled sheet becomes high, the stored energy in the cold rolled sheet becomes large, and the driving force for recrystallization become stronger, then the recrystallization grains in the intermediate annealing becomes thinning, and the thinning grains are conductive. The second recrystallization grains which can swallow up the initial grain can obtain the coarse grains. When first cold rolling reduction rate is 81%, the microstructure deformation of the cold-rolled sheet is too large, the recrystallized grains generate the phenomenon of secondary recrystallization in the intermediate annealing, the grains abnormally grows, so it can not get the satisfactory microstructure grains.

关 键 词：低温取向硅钢 二次冷轧法 冷轧压下率 组织 

分 类 号：TG113.1[金属学及工艺—物理冶金]