【摘要】 经研究分析 ,铸造铝合金RR35 0经淬火时效后 ,其主要合金相由细小初生相 (α +θ″)、二次相TMn和TNi、过剩相AlCuNi、Al9FeNi以及NiAl3 、TiAl3 等相组成。这些合金相大多以复合相形式分布于晶界上 ,阻止晶界的扩展。结果表明 ,采用成分多元少量、合金相复合多样 ,合理分布于铝合金中 ,可提高铸造铝合金RR35 0的热强性、耐蚀性等性能。更多还原

【Abstract】 The casting aluminium alloy RR350, which was harden by using quenching and aging process, consists of the fine first phases (α+θ″), quadratic phases T Mn and T Ni, surplus phase AlCuNi and Al 9FeNi , as well as NiAl 3 and TiAl 3 etc. The alloy phases are mostly distributed over the grain boundary in the form of compound phases, and they can hold back grain boundary migration. The test results confirm the microstructures, many fine compound phases being dispersively distributed in the aluminium alloy matrix, can increase the calorific in tensity and the corrosion resistance of alloy RR350.更多还原