热浸镀锌基合金流动性研究及组织分析  

Investigation on fluidity of hop-dip galvanizing zinc-based alloys and microstructure analysis

作　　者：于波涛[1] 何明奕[1] 王胜民[1] 赵晓军[1] 宋丹[1] 

机构地区：[1]昆明理工大学材料保护研究所,云南昆明650093

出　　处：《钢铁研究》2011年第2期30-32,42,共4页Research on Iron and Steel

摘　　要：采用金属型螺旋线模具测量了4种常用热浸镀合金液的流动性,并对螺旋线试样的组织进行观察、分析和讨论。测量结果显示:在445℃时,4种合金液的流动性随着Al质量分数的增加呈先降低后增加的趋势,当Al质量分数低于0.2%时,合金液的流动性下降;而当Al质量分数增加到5%时,合金液的流动性又增加。研究发现引起这种变化的原因是由于随着Al质量分数的增加,凝固过程的组织中出现了树枝晶、沉淀相和共析反应中产生的"自热"现象。The fluidity of four kinds of typical hot-dip galvanizing alloy liquid is measured with spiral mould test apparatus and the microstructure of the samples are analyzed.The result shows that the fluidity of the four alloys tends to decrease firstly and then increases with the Al content increasing.When the Al content added is less than 0.2 % for the Zinc-Aluminum composite,the fluidity will decrease,and when the Al content added is between 0.2 % and 5 %,the fluidity will increase.The metallographic analysis reveals that dendrite,deposit phase and latent heat of crystallization on eutectoid reaction can be observed in cooling process.

关 键 词：热浸镀锌 流动性 AL 合金液 沉淀相 

分 类 号：TG174.4[金属学及工艺—金属表面处理]