主要相組成的影響
( 1. 南昌大學(xué) 材料科學(xué)與工程學(xué)院, 南昌 330047;
2. 中南大學(xué) 材料科學(xué)與工程學(xué)院, 長沙 410083;
3. 中國兵器科學(xué)院 寧波分院, 寧波 315103)
摘 要: 為了解冷卻速度對Al-Fe-V-Si合金耐熱相的形成規(guī)律, 采用光學(xué)顯微鏡、 X射線衍射儀、 透射電鏡檢測了幾種冷卻速度條件下的Al-8.5Fe、 Al-8.5Fe-1.7Si、 Al-8.5Fe-1.3V-1.7Si (質(zhì)量分?jǐn)?shù), %)合金的微觀組織結(jié)構(gòu)。 結(jié)果表明: V、 Si元素能影響平衡相Al13Fe4的形貌,冷卻速度對Al13Fe4的存在起著決定性作用, 要消除Al13Fe4相就必須采用大的冷卻速度(>103 K/s)。 在Al-8.5Fe-1.7Si-1.3V合金中全部得到α-Al和Al12(Fe, V)3Si相, 冷卻速度應(yīng)大于104 K/s。
關(guān)鍵字: 耐熱鋁合金; 微觀組織; 冷卻速度
WANG Ri-chu2, CHEN Wei3
( 1. School of Materials Science and Engineering,
Nanchang University, Nanchang 330047, China;
2. School of Materials Science and Engineering,
Central South University, Changsha 410083, China;
3. Ningbo Branch, China Ordnance Science, Ningbo 315103, China)
Abstract: In order to research the behavior of phases formation in Al-Fe-V-Si system alloy, the microstructures of Al-8.5Fe, Al-8.5Fe-1.7Si, Al-8.5Fe-1.3V-1.7Si (mass fraction, %) were examined by optical microscopy, X-ray diffractrometry and transmitting electron microscopy. The results show that, adding V, Si can affect the appearance of equilibrium Al13Fe4 phase. When cooling rate is higher than 103 K/s, there is no Al13Fe4 phase in Al-Fe-V-Si system alloy. If there are only α-Al and Al12(Fe, V)3Si, the cooling rate must be higher than 104 K/s。
Key words: heat-resistant aluminum alloy; microstructure; cooling rate


