【摘要】 采用电阻炉熔炼、锂盐覆盖、氩气保护的工艺方法,在浇注温度为720℃,型温分别在100℃、200℃和300℃试验条件下,制备超轻Mg-12%Li-Al铸造镁合金并且均匀化退火。通过对显微组织和力学性能的分析,结果表明:超轻Mg-12%Li-Al铸造镁合金在型温为300℃浇注时,合金的铸态组织和性能比较好;合金经过450K×5h固溶后,组织十分均匀,力学性能良好。更多还原

【Abstract】 The experiment was adopted by means of lithium flux cover and argon protection in a electric resistance furnace,the ingots of super light Mg-12wt%Li-1wt%Al as-cast alloy has been melted and cast successfully in the condition of 720 ℃ casting temperature and 100 ℃?200 ℃ and 300 ℃ mould temperature,and was homogenized.Via the microstructures and mechanical properties analysis,the results indicate that the ingots of super light Mg-12wt%Li-1wt%Al as-cast alloy cast successfully in the condition of 300 ℃ mould temperature has the better casting microstructures and properties;the optimum condition of the treatment of the super light Mg-12wt%Li-1wt%Al as-cast alloy is 450 K×5 h,its microstructures are even and have better mechanical properties.更多还原