(中南工业大学粉末冶金研究所，长沙410083)
摘 要: 研究了Al-Si合金粉末热锻密实工艺和合金性能。结果表明，当合金含硅量不超过30%时，锻坯的密度可达到理论密度的99%以上。合金组织中初晶硅分布均匀，没有针状或大块片状组织出现。添加Cu、 Mg的Al-10Si-2Cu-1Mg和Al-15Si-2Cu-1Mg合金性能比相应的Al-Si二元合金明显提高，拉伸强度分别达到284~324M Pa和304~333M Pa，布氏硬氏124~128和122~124。
关键字: Al-Si合金 粉末热锻 机械性能 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
