【摘要】 研究了Al5TiB对Mg 8Zn 4Al 0.3Mn铸造镁合金显微组织的影响。结果表明,Mg 8Zn 4Al 0.3Mn铸造镁合金的显微组织主要由Mg相、(Al2Mg5Zn2)相、τ(Mg32(Al,Zn)49)相组成。加入0.5%的Al5TiB可显著细化合金的铸态组织,晶粒大小由120～130μm减少到30～40μm。随着Al5TiB加入量的增加,合金的共晶α(Mg)相数量和合金的显微硬度均呈增加趋势。更多还原

【Abstract】 The effects of Al5TiB on microstructure of casting magnesium alloys Mg8Zn4Al0.3Mn have been studied. The results show that the microstructure of Mg8Zn4Al0.3Mn casting magnesium alloys mainly contain Mg matrix, eutectic α(Mg), (Al2Mg5Zn2)phase and τ(Mg32(Al,Zn)49) phase. Casting microstructure of Mg8Zn4Al0.3Mn magnesium alloys can be refined by addition of 0.5%wt Al5TiB. The grains size decreases from 120～130μm to 30～40μm. The eutectic α(Mg)quantity and microhardness of Mg8Zn4Al0.3Mn magnesium alloys increase with the increase of Al5TiB addition. 更多还原