冷拉拔对镀锌钢丝组织及性能的影响  

Effect of Cold Drawing on Structure and Properties of Galvanized Steel Wire

作　　者：武阿林 陶曼桦 吴桂峰 沈爱红 乔文玮 WU Alin;TAO Manhua;WU Guifeng;SHEN Aihong;QIAO Wenwei(Jiangsu Huaneng Cable Co.,Ltd.,Gaoyou 225699,China;College of Electrical and Energy Power Engineering Yangzhou University,Yangzhou 225009,China)

机构地区：[1]江苏华能电缆股份有限公司,高邮225699 [2]扬州大学电力与能源动力工程学院,扬州225009

出　　处：《电线电缆》2024年第6期9-12,共4页Wire & Cable

摘　　要：通过扫描电子显微镜观察镀锌钢丝冷拉拔前后的组织形貌,并利用X射线衍射仪分析镀层的物相结构变化,最后进行电化学性能测试,以研究冷拉拔前后镀锌钢丝耐蚀性变化。结果表明,经二次冷拉拔后钢丝的抗拉强度由盘条的1 050 MPa提高到2 035 MPa,基体组织演变为沿拉拔方向的纤维状;镀层减薄显著,自腐蚀电位无明显变化,并保持在-1.04~-1.02 V范围内,但自腐蚀电流密度由6.080×10^(-5) A·cm^(-2)降低到0.861×10^(-5) A·cm^(-2),且阻抗弧明显变大;冷拉拔形变使得镀锌钢丝的强度和耐蚀性均得到了提高。Microstructure of galvanized steel wire before and after cold drawing was observed by scanning electron microscopy,phase structure changes of the coating were analyzed by X-ray diffraction,and corrosion resistance changes were also studied by electrochemical performance testing.Results showed that tensile strength of the steel wire increased from 1 050 MPa to 2 035 MPa after secondary cold drawing,and matrix structure evolved into a fibrous structure along drawing direction.Besides,coating thickness was significantly decreased,and the self corrosion potential showed no significant change,which remained within the range of-1.04 V and-1.02 V.However,corrosion current density reduced from 6.080×10^(-5) A·cm^(-2) to 8.607 × 10^(-6) A·cm^(-2),and impedance arc significantly increased.As a result,cold drawing deformation could not only enhance the strength of galvanized steel wire,but also enhance its corrosion resistance.

关 键 词：镀锌钢丝 冷拉拔 抗拉强度 耐蚀性 

分 类 号：TM247[一般工业技术—材料科学与工程] TG142[电气工程—电工理论与新技术]