热轧螺纹钢筋抗锈蚀性能研究  

Research on the corrosion resistance of hot-rolled rebar

作　　者：楚少康 张龙 张宝富 赵根社 郑亚旭 邱贵宝[3] Chu Shaokang;Zhang Long;Zhang Baofu;Zhao Genshe;Zheng Yaxu;Qiu Guibao(School of Materials Science and Engineering,Hebei University of Science and Technology,Hebei Provincial Key Laboratory of Materials Near-Net Forming Technology,Hebei Short Process Steelmaking Technology Center,Shijiazhuang 050018,Hebei;Yancheng Lianxin Iron&Steel Co.,Ltd.,Yancheng 224003,Jiangsu;School of Materials Science and Engineering,Chongqing University,Chongqing 400045)

机构地区：[1]河北科技大学材料科学与工程学院,河北省材料近净成形技术重点实验室,河北省短流程炼钢技术中心,河北石家庄050018 [2]盐城市联鑫钢铁有限公司,江苏盐城224003 [3]重庆大学材料科学与工程学院,重庆400045

出　　处：《河北冶金》2025年第1期19-28,共10页Hebei Metallurgy

基　　金：国家自然科学基金(52204341);中国博士后科学基金(2023M740415)。

摘　　要：利用光学显微镜、X射线衍射及电子背散射衍射技术分析了HRB400E热轧螺纹钢筋表面氧化铁皮形貌、厚度及结构组成,并通过电化学实验和大气腐蚀实验检测表面氧化铁皮抗锈蚀性能,研究了终轧温度和冷速对螺纹钢筋表面氧化铁皮性质的影响,并分析了其对锈蚀性能的影响机理。同时,还对钢筋基体组织和力学性能进行了检测,研究了终轧温度和冷速对螺纹钢筋组织和力学性能的影响。结果表明,不同终轧温度和不同冷速下钢筋基体组织和力学性能变化不大,钢筋表面氧化铁皮均由Fe_(3)O_(4)和FeO组成。终轧温度为920℃时,氧化铁皮较完整,厚度和Fe_(3)O_(4)含量增加,且钢筋的抗锈蚀性能增强;相比气雾冷,空冷下氧化铁皮的厚度增加,Fe_(3)O_(4)含量增加,能够对钢筋基体起到较好的保护作用,故在保证钢筋力学性能的基础上,应提升终轧温度至920℃且轧后采用空冷。Optical microscopy,X-ray diffraction and electron backscatter diffraction techniques were used to observe and analyze the morphology,thickness and structural composition of iron oxide scale on the surface of HRB400E hot-rolled rebars,and the anti-corrosion properties of iron oxide scale on the surface were detected by electrochemical experiments and atmospheric corrosion experiments,and the effects of final rolling temperature and cooling rate on the properties of iron oxide scale on the surface of rebar were studied,and the influence mechanism of iron oxide scale on the surface of rebar was analyzed.At the same time,the matrix structure and mechanical properties of the rebar were also tested,and the effects of the final rolling temperature and cooling rate on the microstructure and mechanical properties of the rebar were studied.The results show that the matrix structure and mechanical properties of the steel bars do not change much under different final rolling temperatures and different cooling speeds,and the iron oxide scale on the surface of the steel bars is composed of Fe_(3)O_(4) and FeO.When the final rolling temperature is 920℃,the iron oxide scale is more complete,the thickness and Fe_(3)O_(4) content increase,and the corrosion resistance of the steel bar is enhanced.Compared with aerosol cooling,the thickness of iron oxide scale and the content of Fe_(3)O_(4) increase under air cooling,which can play a better protective role in the steel matrix.Therefore,on the basis of ensuring the mechanical properties of steel bars,the final rolling temperature should be increased to 920℃and air cooling should be adopted after rolling.

关 键 词：螺纹钢筋 冷速 终轧温度 氧化铁皮 抗锈蚀性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]