常化及冷轧压下率对Hi-B钢初次再结晶织构影响  

Influence of cold-rolling reduction ratio and normalizing process on primary recrystallization texture of Hi-B steel

作　　者：徐永[1,2] 赵刚[1,2] 肖欢[1,2] XU Yong ZHAO Gang XIAO Huan(School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China)

机构地区：[1]武汉科技大学材料与冶金学院,湖北武汉430081 [2]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081

出　　处：《钢铁》2016年第12期65-69,102,共6页Iron and Steel

基　　金：国家自然科学基金资助项目(51274155)

摘　　要：为了研究Hi-B钢的常化工艺(二段式常化)及不同冷轧压下率(63.8%、75.2%及87.1%)对其初次再结晶退火(820℃,5 min)后织构的影响,采用CSP工艺试制以Cu2S和Al N作为抑制剂的方法进行模拟。利用NOVA400Nano SEM场发射扫描电子显微镜对初次再结晶退火后的微观织构进行EBSD数据采集,从晶粒取向、ODF分析以及特征取向线分析3个方面对织构进行分析。结果表明,经常化后再冷轧初次退火后Hi-B钢的组织更加均匀,高斯织构和有利的{111}〈112〉织构相对较多,织构间发生了转变,对产生高斯织构有利的{111}〈112〉织构为主要转变产物。在压下率为87.1%时,有良好的晶粒取向以及合适的取向线分布。The influences of different cold-rolling reduction ratios（63.8%,75.2%,87.1%） and normalizing（two-stage normalizing） process on primary recrystallization（820 ℃,5 min） of Hi-B steel which took Cu2 S and Al N as inhibitor manufactured by stimulating CSP process were studied by electron back-scattered diffraction NOVA400 Nano field emission scanning electron microscope（SEM） and electron back-scattered diffraction（EBSD）（EBSD）. The analysis of texture was based on three aspects：grain-oriented,PDF cross section of φ2=45 and density of orientation lines. The results show that the micro-structure of specimens which has been primary recrystallization annealed after normalizing is more even,{111}〈112〉and Goss textures are more relatively. Textures transforms,and the conversion products are mainly{111}〈112〉texture which benefits the formation of Goss texture. When the reduction ratio is 87.1%,the structure has favorable grain orientation and suitable orientation line distributed.

关 键 词：Hi-B钢 常化 压下率 初次再结晶 织构 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG337.3[金属学及工艺—金属材料]