摘要
不锈钢/碳钢复合钢筋作为一种复合材料,其开发和生产对耐蚀工程应用具有重大意义。以S22053双相不锈钢为覆层,使用碳当量分别为0.450(1号碳钢)和0.297(2号碳钢)的两种碳钢作为基材,进行了不锈钢/碳钢复合钢筋的工业制备,对复合钢筋的宏观形貌、覆层均匀性、碳钢组织均匀性进行了观察,对力学性能和耐腐蚀性能进行了测试。结果表明:不锈钢/碳钢复合钢筋覆层厚度达到国标要求,基材为1号碳钢和2号碳钢的不锈钢/碳钢复合钢筋均具备高伸长率、低屈强比,其中1号碳钢基材的复合钢筋抗拉强度更高,2号碳钢基材的复合钢筋最大力伸长率更大,直径较小的复合钢筋的基材碳钢组织更为均匀;覆层S22053双相不锈钢的表面经过铜-硫酸铜-16%(质量分数)硫酸溶液煮沸20 h后,未发生晶间腐蚀倾向。所制备的不锈钢/碳钢复合钢筋的力学性能和耐腐蚀性能均满足GB/T 36707—2018要求。
The development and production of stainless steel/carbon steel composite bars as a composite material have significant implications for corrosion-resistant engineering applications.The industrial preparation of stainless steel/carbon steel composite bars was carried out using S22053 duplex stainless steel as the cladding layer and two types of carbon steels with carbon equivalents of 0.450(No.1 carbon steel)and 0.297(No.2 carbon steel)as base materials.The macroscopic morphology,cladding layer uniformity,and carbon steel microstructure uniformity of the composite bars were observed,and the mechanical properties and corrosion resistance were tested.The results showed that the cladding layer thickness of the stainless steel/carbon steel composite bars met the national standard requirements.The stainless steel/carbon steel composite bars with base materials of No.1 carbon steel and No.2 carbon steel both had high elongation and low yield strength ratio.Among them,the composite bars with base materials of No.1 carbon steel had higher tensile strength,while the composite bars with base materials of No.2 carbon steel had a larger maximum force elongation.The microstructure of the carbon steel of composite bars with smaller diameters is more uniform.After boiling S22053 duplex stainless steel with a copper-copper sulfate-16%(mass fraction)sulfuric acid solution for 20 h,there was no tendency for intergranular corrosion on the surface.The mechanical properties and corrosion resistance of the prepared stainless steel/carbon steel composite bars meet the requirements of GB/T 36707—2018.
作者
孔伟
闫博
焦四海
KONG Wei;YAN Bo;JIAO Sihai(Baosteel Central Research Institute,Baoshan Iron and Steel Co.,Ltd.,Shanghai 200900,China;Xinyu Iron and Steel Group Co.,Ltd.,Xinyu 338000,China)
出处
《轧钢》
北大核心
2025年第3期121-126,共6页
Steel Rolling
关键词
不锈钢/碳钢复合钢筋
显微组织
力学性能
耐蚀性能
stainless steel
carbon steel composite bar
microstructure
mechanical properties
corrosion resistance
