摘要
研究了AZ91HP镁合金在不同变质、精炼条件下铸件的组织和力学性能。结果表明：变质、精炼处理后，镁合金铸件晶粒得到细化，力学性能提高。其中CzCls变质结合氩气吹洗精炼效果最好，在此条件下，铸件T6状态力学性能达到了σ0.2=132．6MPa、σb=250．5MPa和δ—4．93％。进一步分析表明晶粒细化的机理为含C、A1化合物的异质形核作用。
The microstructures and mechanical properties of AZ91 HP magnesium alloys under different modifying and refining treatments have been studied. The results show that the grain sizes of modified and/or refined magnesium alloys decreased and the properties increased. The method of modifying with C2C16 and refining with argon gas have the best effect on the mechanical properties of Mg-A1 series magnesium alloys, and the yield strength, ultimate strength and elongation in T6 status are 132.6MPa, 250.5MPa and 4.93 % respectively. Farther research shows that the heterogeneous nucleation effect of compound containing C and A1 is the grain refinement mechanism.
出处
《中国材料科技与设备》
2007年第6期93-95,共3页
Chinese Materials Science Technology & Equipment
基金
国家863计划项目（2002AA336080）
国家973计划项目（G2000067202）
江西省教育厅资助项目
关键词
镁合金
变质
精炼
晶粒细化
异质形核
Magnesium alloy
Modifying
Refining
Grain refinement
Heterogeneous nucleation
