输电铁塔钢制件热浸镀锌工艺优化研究  

Study on optimization of hot-dip galvanizing process for steel parts of transmission tower

作　　者：胡林波 HU Lin-bo(China Power Construction Wuhan Iron Tower Co.,Ltd.,Wuhan 430000,China)

机构地区：[1]中电建武汉铁塔有限公司,湖北武汉430000

出　　处：《重型机械》2023年第2期121-125,共5页Heavy Machinery

摘　　要：对输电铁塔传统热浸镀锌工艺进行优化,主要包括对热浸镀锌过程中的锌液温度、起吊角度以及起吊速度的研究。对经过不同工艺参数试样的热浸镀锌层进行锌层厚度测量,并按照《输电线路铁塔制造技术条件》进行均匀性和附着性试验。通过对不同影响因素的试验结果分析,锌层厚度和均匀性的变化规律相似,主要由起吊角度和起吊速度共同影响,锌层附着性主要受起吊速度的影响。在镀锌过程中选择锌液温度为440℃,镀锌结束起吊时应尽量使镀件轴线与锌液面的夹角大于45°,起吊速度常选择为2.0 m/min,可在保证锌层质量的前提下,较大程度地减小锌层厚度,降低锌耗量。工艺优化后锌层厚度较均匀,防腐性能满足相关要求。The traditional hot-dip galvanizing process of transmission tower was optimized,mainly including the research on the temperature of zinc liquid,lifting angle and lifting speed during the hot-dip galvanizing process.The zinc coating thickness of the hot-dip galvanized coating samples with different process parameters were measured,and the uniformity and adhesion test are conducted according to Technical Conditions for Manufacturing of Transmission Line Tower.Through the analysis of the test results under different influencing factors,the change rule of zinc layer thickness and uniformity is similar,mainly affected by the lifting angle and lifting speed,and the zinc layer adhesion is mainly affected by the lifting speed.In the process of galvanizing,the temperature of the zinc solution is 440℃.When the galvanizing is finished and lifting,the angle between the axis of the galvanized part and the zinc liquid level should be greater than 45°.The lifting speed is usually 2.0 m/min,which can greatly reduce the thickness of the zinc layer and reduce the zinc consumption on the premise of ensuring the quality of the zinc layer.After process optimization,the zinc coating thickness is uniform,and the anti-corrosion performance meets relevant requirements.

关 键 词：热浸镀锌 热镀锌 输电铁塔 镀锌工艺 

分 类 号：TG174.4[金属学及工艺—金属表面处理]