ABSTRACT

The effect of pouring temperature on microstructure and bonding properties of the Mg/aluminised steel bimetallic castings prepared by the solid–liquid compound casting process was investigated in this paper in order to improve the interface bonding of the Mg/aluminised steel bimetallic castings. The results show that the Mg/aluminised steel bimetallic castings produced with different pouring temperatures obtained a uniform interface layer that was mainly composed of the Fe₂Al₅, τ₁₀-Al₉Fe₄Si₃, FeAl₃ and Al₁₂Mg₁₇ phases. When the pouring temperature was low, the cracks were formed between the Mg and the interface layer. With increasing pouring temperature, a compact interface bonding was achieved. The bonding properties of the Mg/aluminised steel bimetallic castings increased with increasing pouring temperature. An optimised bonding of the Mg/aluminised steel bimetallic castings was obtained with a pouring temperature of 780°C.

摘要

本文研究了浇注温度对固液复合铸造工艺制得的镁/铝化钢双金属铸件的组织和结合性能的影响，以改善镁/铝化钢双金属铸件的界面结合。结果表明，用不同的浇注温度下产生的所述Mg /镀铝钢双金属铸件获得的主要由铁的均匀界面层₂的Al ₅，τ ₁₀ -Al ₉的Fe ₄的Si ₃，的FeAl ₃和Al ₁₂ Mg的₁₇阶段。当浇注温度低时，在Mg和界面层之间形成裂纹。随着浇注温度的升高，实现了紧密的界面粘合。镁/铝化钢双金属铸件的结合性能随浇铸温度的升高而增加。浇注温度为780°C时，Mg /铝化钢双金属铸件的优化结合。