摘要
在高强钢热浸镀铝硅合金中,通常会有一定量Mn溶解到镀液中,对镀层凝固组织产生影响。本文研究了热浸镀用Al-10Si-2Fe合金中Mn元素对凝固组织及富铁相的影响规律。结果显示,随着Mn含量的增加,铝硅合金中富铁相形貌转变过程如下:针状→汉字状→星状→多边形。借助Pandat软件在热力学层面解释了Mn添加后铝硅合金中β-Al_9Fe_2Si_2相向α-Al_8(Fe,Mn)_2Si相转变的原因。此外,给出了添加Mn后的渣量计算结果,认为铝硅熔液中最佳Mn含量(质量分数)应为0.8%～1.0%。
During hot-dip Al-Si alloy coating process,there will be a certain amount of Mn dissolved into the bath,which affects the solidification microstructure of the coating.In this paper,the influence of Mn addition on solidification structure and iron-rich phase in Al-10Si-2Fe alloy for hot-dip coating was studied.The results show that with the increasing of Mn,the transformation sequence of iron-rich phase in aluminum silicon alloy is as follows:needle-like→Chinese-script→star-like→polygon.The thermodynamically reasons for the transformation ofβ-Al9Fe2Si2 phase toα-Al8(Fe,Mn)2Si phase in Al-Si alloy after Mn addition were explained by means of Pandat software.Moreover,the variation of slag content with Mn addition was also calculated,which shows that the optimal Mn content in Al-Si melt should be 0.8%?1.0%.
作者
吴广新
张捷宇
WU Guang-xin;ZHANG Jie-yu(State Key Laboratory of Advanced Special Steel,Shanghai University,Shanghai,200072,China;Shanghai Key Laboratory of Advanced Ferrometallurgy,Shanghai University,Shanghai 200072,China;School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2019年第1期122-130,共9页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51674163)
上海市科委自然科学基金资助项目(16ZR1412000)~~
关键词
铝硅镀层
富铁相
渣量
hot-dip
Al-10Si-2Fe coating
iron-rich phase,dross amount
