稀土钇对不同处理状态镁-铝-钙-钛铸造镁合金组织和硬度的影响
Influence of Yttrium on Microstructure and Property of Different-treated Cast Magnesium Alloy
摘 要
用X射线衍射仪、光学显微镜检测和观察了铸态、固溶态和时效态镁-铝-钙-钛铸造镁合金的相结构和显微组织,并测试了不同状态镁合金的硬度,探寻稀土元素钇及不同热处理对铸造镁合金的相结构、显微组织和硬度的影响.结果表明：随钇元素加入增多,镁合金第二相的析出增加,分布更均匀,且晶粒尺寸减小;铸态显微硬度显著提高;时效和固溶处理对其显微组织有明显的影响,但对硬度影响不大.
稀土钇
固溶
时效
magnesium alloys
rare earth yttrium
solution treatment
ageing
Abstract
The phases and microstructure of the differently treated Mg-Al-Ca-Ti cast magnesium alloys were investigated by X-ray diffract meter and optical microscope and their Vickers’ hardness were measured.The influence of small amount additional yttrium in Mg-Al-Ca-Ti cast magnesium and the followed heat treatment on their phases,microstructure and Vickers’ hardness were studied.The results show that with the increase of the additional yttrium,the amount of the second phase increases and with more uniform distribution,the grain size decreases and the Vickers’ hardness increase significantly.Solution treatment plus aging clearly modify the microstructure of the studied cast magnesium alloys;though have no significant effect in increasing the Vickers’ hardness.
中图分类号 TG146
所属栏目
基金项目 江苏省常州市科技攻关计划资助项目(CE2004027)
收稿日期 2006/12/25
修改稿日期 2007/4/23
网络出版日期
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备注胡静(1966-),女,湖南长沙人,教授,博士.
引用该论文: HU Jing,XIE Fei,LIN Dong-liang,ZUO Xiao-qian. Influence of Yttrium on Microstructure and Property of Different-treated Cast Magnesium Alloy[J]. Materials for mechancial engineering, 2007, 31(9): 44～47
胡静,谢飞,林栋梁,左晓千. 稀土钇对不同处理状态镁-铝-钙-钛铸造镁合金组织和硬度的影响[J]. 机械工程材料, 2007, 31(9): 44～47
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参考文献
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【5】房灿峰,张兴国.镁合金的性能、成形技术及其应用研究[J].金属热处理,2006,31(3):12-16.
【2】Polmear I J.Recent development in light alloys[J].Mater Trans,JIM,1996,37(1):12-31.
【3】Ninomiya R,Ojiro T,Kubota K.Improved heat resistance of Mg-Al alloys by the Ca addition[J].Acta Metall Mater,1995,43(2):669-674.
【4】Socjusz-Podosek M,Lity′nska L.Effect of yttrium on structure and mechanical properties of Mg alloys[J].Materials Chemistry and Physics,2003,80:472-475.
【5】房灿峰,张兴国.镁合金的性能、成形技术及其应用研究[J].金属热处理,2006,31(3):12-16.
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