工程科学学报，第41卷，第1期：104-110,2019年1月 Chinese Joural of Engineering,Vol.41,No.I:104-110,January 2019 DOI:10.13374/j.issn2095-9389.2019.01.011;http://journals.ustb.edu.cn 终轧温度对600MPa级高钛高成型性铁素体-珠光体 酸洗带钢组织与织构的影响 王智权23)，郭子峰23)，尚成嘉)，张衍23)，冯军23)，陈斌23)，吕宝 锋+)，李玉鹏) 1)北京科技大学钢铁共性技术协同创新中心，北京1000832)首钢集团有限公司技术研究院薄板研究所，北京100043 3)首钢集团有限公司绿色可循环钢铁流程北京市重点实验室，北京1000434)首钢股份公司迁安钢铁公司，迁安064404 ☒通信作者，E-mail:cishang(@usth.edu.cn 摘要利用扫描电子显微镜(SEM)与电子背散射衍射技术(EBSD)研究了高T高成型性铁素体-珠光体型热轧酸洗带钢不 同终轧温度下的组织与织构特征.研究结果表明，终轧温度对显微组织的演变影响较小，但却引起了大角晶界密度的升高. 不同终轧温度时形成的组织均以铁素体为主，少量的珠光体弥散分布在铁素体基体之间.终轧温度的提高引起了织构类型的 显著改变，随着终轧温度的升高，织构强度整体增强，并形成了明显的对冲压成型性有利的近γ织构.当终轧温度为850℃ 时，近a织构与y织构强度均较弱，此时的织构类型主要为{001[110]、{113}[471]、114}[1i0]和223}[1i0]成型不利织 构，成型不利织构强度更高：当终轧温度升高至875℃时，织构类型主要为近y织构和{001}[110]旋转立方织构，近y织构体 积分数由19.9%升高至41%，成型有利织构强度显著增强 关键词热轧酸洗带钢；终轧温度显微组织；织构；大角晶界；成型性 分类号TG142.71 Effect of FDT on microstructure and crystallographic texture of 600 MPa grade high-titanium high-formability ferrite-pearlite pickling steel WANG Zhi-quan'23),GUO Zi-feng2.3),SHANG Cheng-jia,ZHANG Yan23),FENG Jun),CHEN Bin2),LU Bao-feng,LI Yu-peng) 1)Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China 2)Sheet Metal Research Institute,Shougang Research Institute of Technology,Shougang Group Co.,Ltd.,Beijing 100043,China 3)Beijing key Laboratory of Green Recyclable Process for Iron steel Production Technology,Shougang Group Co.,Ltd,Beijing 100043,China 4)Shougang Qian'an Iron Steel Co.Ltd,Qian'an 064404,China Corresponding author,E-mail:cjshang@ustb.edu.cn ABSTRACT Obtaining a near-y texture that parallels that of a rolling plane enhances the r value of steel,thereby improving its form- ability.A high-angle grain boundary with a misorientation greater than 45 degrees is another crucial factor contributing to the formability of steel.Steel's crack arrest capability is dramatically improved by increasing the density of the high-angle grain boundary.The primary factors associated with texture evolution include chemical composition,finishing delivery temperature(FDT),rolling speed,and cool- ing rate after final rolling,of which the FDT is the most critical.Previous studies,which emphasized only pipelines and interstitial-free steels,have suggested that there is a discrepancy in the relationship between FDT and texture,and this relationship remains unclear with respect to high-titanium high-formability ferrite-pearlite steel.In this study,the microstructure and crystallographic texture of a 收稿日期：2017-12-21工程科学学报,第 41 卷,第 1 期:104鄄鄄110,2019 年 1 月 Chinese Journal of Engineering, Vol. 41, No. 1: 104鄄鄄110, January 2019 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2019. 01. 011; http: / / journals. ustb. edu. cn 终轧温度对 600 MPa 级高钛高成型性铁素体鄄鄄 珠光体 酸洗带钢组织与织构的影响 王智权1,2,3) , 郭子峰2,3) , 尚成嘉1)苣 , 张 衍2,3) , 冯 军2,3) , 陈 斌2,3) , 吕宝 锋4) , 李玉鹏4) 1) 北京科技大学钢铁共性技术协同创新中心, 北京 100083 2) 首钢集团有限公司技术研究院薄板研究所, 北京 100043 3) 首钢集团有限公司绿色可循环钢铁流程北京市重点实验室, 北京 100043 4) 首钢股份公司迁安钢铁公司, 迁安 064404 苣 通信作者, E鄄mail: cjshang@ ustb. edu. cn 摘 要 利用扫描电子显微镜(SEM)与电子背散射衍射技术(EBSD)研究了高 Ti 高成型性铁素体鄄鄄珠光体型热轧酸洗带钢不 同终轧温度下的组织与织构特征. 研究结果表明,终轧温度对显微组织的演变影响较小,但却引起了大角晶界密度的升高. 不同终轧温度时形成的组织均以铁素体为主,少量的珠光体弥散分布在铁素体基体之间. 终轧温度的提高引起了织构类型的 显著改变,随着终轧温度的升高,织构强度整体增强,并形成了明显的对冲压成型性有利的近 酌 织构. 当终轧温度为 850 益 时,近 琢 织构与 酌 织构强度均较弱,此时的织构类型主要为{001}[110]、{113}[47 - 1]、{114}[11 - 0]和{223}[11 - 0]成型不利织 构,成型不利织构强度更高;当终轧温度升高至 875 益时,织构类型主要为近 酌 织构和{001}[110]旋转立方织构,近 酌 织构体 积分数由 19郾 9% 升高至 41% ,成型有利织构强度显著增强. 关键词 热轧酸洗带钢; 终轧温度; 显微组织; 织构; 大角晶界; 成型性 分类号 TG142郾 71 收稿日期: 2017鄄鄄12鄄鄄21 Effect of FDT on microstructure and crystallographic texture of 600 MPa grade high鄄titanium high鄄formability ferrite鄄pearlite pickling steel WANG Zhi鄄quan 1,2,3) , GUO Zi鄄feng 2,3) , SHANG Cheng鄄jia 1)苣 , ZHANG Yan 2,3) , FENG Jun 2,3) , CHEN Bin 2,3) , L譈 Bao鄄feng 4) , LI Yu鄄peng 4) 1) Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China 2) Sheet Metal Research Institute, Shougang Research Institute of Technology, Shougang Group Co. , Ltd. , Beijing 100043, China 3) Beijing key Laboratory of Green Recyclable Process for Iron & steel Production Technology, Shougang Group Co. , Ltd, Beijing 100043, China 4) Shougang Qian蒺an Iron & Steel Co. Ltd, Qian蒺an 064404, China 苣 Corresponding author, E鄄mail: cjshang@ ustb. edu. cn ABSTRACT Obtaining a near鄄酌 texture that parallels that of a rolling plane enhances the r value of steel, thereby improving its form鄄 ability. A high鄄angle grain boundary with a misorientation greater than 45 degrees is another crucial factor contributing to the formability of steel. Steel蒺s crack arrest capability is dramatically improved by increasing the density of the high鄄angle grain boundary. The primary factors associated with texture evolution include chemical composition, finishing delivery temperature (FDT), rolling speed, and cool鄄 ing rate after final rolling, of which the FDT is the most critical. Previous studies, which emphasized only pipelines and interstitial鄄free steels, have suggested that there is a discrepancy in the relationship between FDT and texture, and this relationship remains unclear with respect to high鄄titanium high鄄formability ferrite鄄pearlite steel. In this study, the microstructure and crystallographic texture of a