With analysis lo-Mg-Al alloy composition C5M4 and of reasonable smelting, heat treatment, permanentcasting and other technological measures qualified EMU motor cover can be produced.
通过对合金成分分析，采取合理的熔炼、热处理、金属型铸造等工艺措施，能生产合格的动车组用电机端盖。
2
Casting: Expendable mold and permanent mold.
铸造：一次性铸造和永久性铸造。
3
Through the adjustment of coating formula and thickness, the service life and the casting quality of permanent mould could be enhanced.