(1. 上海大學 省部共建高品質(zhì)特殊鋼冶金與制備國家重點實驗室，上海 200072；
2. 上海大學 上海市現(xiàn)代冶金與材料制備重點實驗室，上海 200072；
3. 上海大學 材料科學與工程學院，上海 200072)
摘 要: 在高強鋼熱浸鍍鋁硅合金中，通常會有一定量Mn溶解到鍍液中，對鍍層凝固組織產(chǎn)生影響。本文研究了熱浸鍍用Al-10Si-2Fe合金中Mn元素對凝固組織及富鐵相的影響規(guī)律。結(jié)果顯示，隨著Mn含量的增加，鋁硅合金中富鐵相形貌轉(zhuǎn)變過程如下：針狀→漢字狀→星狀→多邊形。借助Pandat軟件在熱力學層面解釋了Mn添加后鋁硅合金中β-Al9Fe2Si2相向α-Al8(Fe,Mn)2Si相轉(zhuǎn)變的原因。此外，給出了添加Mn后的渣量計算結(jié)果，認為鋁硅熔液中最佳Mn含量(質(zhì)量分數(shù))應為0.8%~1.0%。
關(guān)鍵字: 鋁硅鍍層，富鐵相，渣量
（1. State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai, 200072, China;
2. Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University, Shanghai 200072, China;
3. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China）
Abstract: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 of β-Al9Fe2Si2 phase to α-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%.
Key words: hot-dip; Al-10Si-2Fe coating; iron-rich phase, dross amount
