(中南工業(yè)大學(xué)粉末冶金研究所，長沙410083)
摘 要: 研究了Al-Si合金粉末熱鍛密實(shí)工藝和合金性能。結(jié)果表明，當(dāng)合金含硅量不超過30%時(shí)，鍛坯的密度可達(dá)到理論密度的99%以上。合金組織中初晶硅分布均勻，沒有針狀或大塊片狀組織出現(xiàn)。添加Cu、 Mg的Al-10Si-2Cu-1Mg和Al-15Si-2Cu-1Mg合金性能比相應(yīng)的Al-Si二元合金明顯提高，拉伸強(qiáng)度分別達(dá)到284~324M Pa和304~333M Pa，布氏硬氏124~128和122~124。
關(guān)鍵字: Al-Si合金 粉末熱鍛 機(jī)械性能 耐磨性能
（Powder Metallurgy Research Institute,Central South University of Technology,Changsha 410083）
Abstract:A Thermal forging for a series of Al-Si alloy powder preforms was investigated, and the mechanical properties and wear resistance of the alloys were presented. The results showed that the forging billet might reach 99 per cent theoretical density when silicon content was not beyond 30%. Primary silicon crystal had fine and homogeneous distribution without needle or large plate shape. Tensile strength of Al-10Si-2Cu-1Mg and Al-15Si-2Cu-1Mg were 284~324MPa and 304~333MPa, hardness (HB) 124~128 and 122~124, respectively, higher than relative alloys without Cu and Mg.
Key words: Al-Si powder thermal powder forging mechanical property wear resistance
