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为研究Ti对55%Al-43.5%Zn-Si熔池中底渣相形成的影响,采用金相显微镜、扫描电镜(SEM)及能谱仪(EDS),对不同Ti含量(0.02wt%、0.05wt%、0.10wt%、0.20wt%)下熔池中产生的金属间化合物进行形貌、大小、分布及成分分析。结果表明:当Ti含量为0.02wt%时,镀液中析出少量底渣相,尺寸为50～70μm;随着Ti含量的增加,析出的底渣相尺寸变大,当Ti含量增加到0.20wt%时,镀液析出大量底渣相且聚集成大块状,尺寸为200～500μm。当熔池中Ti含量为0.02%和0.05wt%时,底渣中生成了Al_7Fe_2Si金属间化合物,当Ti含量达到0.20 wt%时,生成了Al_(20)Fe_5Si_2金属间化合物,还生成了TiAl_3金属间化合物。
In order to study the effect of Ti on the formation of bottom slag phase in 55% Al-43.5% Zn-Si molten pool, the microstructure of Ti alloy was characterized by means of metallographic microscope, scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) 0.05wt%, 0.10wt%, 0.20wt%) of the intermetallic compounds produced in the bath morphology, size, distribution and composition analysis. The results show that when the content of Ti is 0.02wt%, a small amount of bottom slag phase is precipitated in the bath with a size of 50-70μm. With the increase of Ti content, the size of precipitated bottom slag becomes larger. When the Ti content increases to 0.20wt% %, The bath precipitated a large number of bottom slag phase and aggregated into massive, size 200 ~ 500μm. Al_7Fe_2Si intermetallic compounds were formed in the bottom slag when the content of Ti in the molten pool was 0.02% and 0.05wt%. When the content of Ti was 0.20wt%, Al_ (20) Fe_5Si_2 intermetallic compounds were formed and TiAl_3 metal Compound.