温轧温度对Cr-Ti-B系低碳钢组织与织构的影响  

Effect of Warm-rolled Temperature on Microstructure and Texture in Cr-Ti-B Low Carbon Steel

作　　者：袁强强 汪志刚[1] 江永芳 张迎晖[1] 黄安康 叶洁云[1] YUAN Qiangqiang;WANG Zhigang;JIANG Yongfang;ZHANG Yinghui;HUANG Ankang;YE Jieyun(Department of Materials Metallurgy Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学材料冶金化学学部,赣州341000

出　　处：《材料研究学报》2022年第2期81-89,共9页Chinese Journal of Materials Research

基　　金：国家自然科学基金(5170040846);江西省重点研发计划(909171403002)。

摘　　要：使用扫描电镜、电子背散射衍射、透射电子显微镜和固体内耗仪研究了温轧温度对Cr-Ti-B系低碳钢组织和织构的影响。结果表明,温轧后钢的组织由变形铁素体和少量珠光体所组成,随着温轧温度的提高铁素体晶内剪切带的含量呈现先提高后降低的趋势,在450℃温轧剪切带的含量最高。剪切带的形成,与Ti和B元素的偏聚密切相关。在350℃和550℃温轧的温轧板中以{001}<110>和{223}<110>为主织构组分,而在450℃温轧的剪切带明显促进γ纤维织构的形成。温轧温度对{001}<110>密度的影响较小而对γ纤维织构的影响较大,{111}<112>组分较为稳定;位错密度和内耗的结果间接表明,低温阶段固溶C原子与位错的交互作用以及高温阶段的动态回复是抑制剪切带和减弱γ纤维织构的主要原因。The effect of warm rolling temperature on deformation microstructure and texture of C-CrTi-B low carbon steel were analyzed by means of scanning electron microscopy, electron backscatter diffraction, transmission electron microscopy and internal friction measurement. The results show that the microstructure after warm rolling was composed of deformed ferrite and a few of pearlite, while the ferrite content in-grain shear band increased first and then decreased with the increase of warm rolling temperature, which reaches the maximum when warm rolling at 450℃. The information of shear bands is closely related to the segregation of Ti and B elements. {001}<110> and {223}<110> textures are the main components at 350℃ and 550℃ respectively, and the shear band formed during rolling at 450℃ favors the formation of the γ-fiber texture obviously. The rolling temperature had little effect on the intensity of the{001}<110> but more effect on the γ-fiber, and the {111}<112> component was the stable texture. The results of dislocation density and internal friction test indirectly indicate that the strong interaction between solid solution C atom and dislocation is the reason to inhibit the formation of shear band at low temperature, whereas, the dynamic recovery leads to weak γ-fiber texture at high temperature.

关 键 词：金属材料 微合金低碳钢 温轧 形变织构 晶内剪切带 固溶碳原子 

分 类 号：TG142.1[一般工业技术—材料科学与工程]