【摘要】：利用光學(xué)顯微鏡和電導(dǎo)率測(cè)試儀對(duì)3104鋁合金不同均勻化條件下的彌散相析出情況進(jìn)行研究。結(jié)果表明,3104鋁合金鑄錠中只有存在少量Al_(12)Mn_3Si彌散相,均勻化后基體中析出大量Al_(12)Mn_3Si彌散相,呈點(diǎn)狀或短棒狀,合金電導(dǎo)率升高。隨時(shí)均勻化溫度升高,彌散相發(fā)生粗化和回溶,密度減小,尺寸增大,并且合金電導(dǎo)率逐漸降低。因此,經(jīng)600℃×10 h均勻化彌散相的密度最低,尺寸最大,為400~500 nm。均勻化升溫降溫速率對(duì)彌散相析出有影響,均勻化升溫速率減慢,彌散相數(shù)量增加,尺寸減小;均勻化冷卻速率增加,數(shù)量減少,尺寸略有減小;而樣品重新在500℃保溫2 h后,彌散相數(shù)量明顯增加,電導(dǎo)率升高,但相互之間差別不大。因此,3104鋁合金鑄錠在較高溫度下(580℃以上)保溫較長時(shí)間,有利于獲得合理的彌散相粒子分布。
[Abstract]:Dispersion phase precipitation of 3104 aluminum alloy under different homogenization conditions was studied by optical microscope and conductivity tester. The results show that there is only a small amount of Al_ (12) Mn_3Si dispersion phase in 3104 aluminum alloy ingot. After homogenization, a large number of Al_ (12) Mn_3Si dispersion phases are precipitated in the matrix, and the alloy electrical conductivity is increased. With the increase of homogenization temperature, coarsening and remelting of the dispersed phase occur, the density decreases, the size increases, and the electrical conductivity of the alloy decreases gradually. Therefore, the density of homogenized dispersion phase at 600 鈩，

本文編號(hào)：2337447