沈阳工业大学学报2011，Vol.33Issue(6)：640-643,660,5.
工艺条件对镁合金中CaMgSn形态与硬度的影响
Effect of technological condition on morphology and hardness of CaMgSn phase in magnesium alloy
摘要
Abstract
With considering the great effect of the morphology of CaMgSn phase on the mechanical properties of Mg-Sn-Ca series alloys,the influence of slow cooling,rapid cooling and aging treatment on the morphology of CaMgSn phase was studied.The effect of different processing conditions on the microstructure,phase structure and hardness of Mg-3Sn-2Ca-3Cu alloy was comparatively analyzed with optical microscope,scanning electron microscope,X-ray diffractometer and microhardness tester,respectively.The analysis results show that the microstructure after slow cooling is mainly composed of α-Mg,CaMgSn,CuMg2,（Cu,Ca）Mg2 and Mg2Sn phases,and the CaMgSn phase is of coarse rod shape.After rapid cooling and aging treatment,the morphology of CaMgSn phase has an obvious change,and changes into the spheroid-like shape after aging for 48 h.After aging treatment,the microhardness of the alloy increases obviously,and reaches the maximum value of 77 HV after aging for 48 h.With prolonging the aging time,it is found that the hardness decreases and the second phases are detached from the matrix.关键词
镁合金/铸造条件/快冷/时效处理/组织/显微硬度/CaMgSn相/Mg2Sn相Key words
magnesium alloy/casting condition/rapid cooling/aging treatment/microstructure/microhardness/CaMgSn phase/Mg2Sn phase分类
矿业与冶金引用本文复制引用
邱克强,李荣华,王俊杰,杨君宝..工艺条件对镁合金中CaMgSn形态与硬度的影响[J].沈阳工业大学学报,2011,33(6):640-643,660,5.基金项目
沈阳市科技攻关资助项目 （）
