TiC对ZA84镁合金铸态组织和力学性能及凝固行为的影响  

Effects of TiC Particles on As-cast Microstructure,Mechanical Properties and Solidification Behavior of ZA84 Magnesium Alloy

作　　者：杨明波[1] 潘复生[2] 白亮[2] 杨慧[1] 

机构地区：[1]重庆工学院材料科学与工程学院 [2]重庆大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2007年第11期821-823,共3页Special Casting & Nonferrous Alloys

基　　金：重庆市科技攻关资助项目(CSTC-2006AA4012-9-6)

摘　　要：研究了TiC对ZA84(Mg-8Zn-4A1-0.25Mn)合金铸态组织、力学性能及凝固行为的影响。结果表明,添加0.5%的TiC对ZA84镁合金组织中相的组成没有影响,但可使合金组织细化,并使合金组织中的三元相从粗大半连续状变为细小断续状,且分布更加弥散均匀。此外,添加0.5%的TiC可使ZA84镁合金的力学性能、抗蠕变性能和铸造流动性提高,其中铸造流动性提高的原因可能与TiC添加影响了合金的凝固温度范围有关。Effects of TiC particle on the as-cast microstructure,mechanical properties and solidification behavior of ZA84 magnesium alloy(Mg-8Zn-4Al-0.25Mn)have been investigated.The results indicate that 0.5%TiC particle addition can refine the microstructure in the alloy,and convert thd ternary phase in the microstructure from the coarse quasi-continuous net into fine discontinuous net with more dispersive distribution,however,it cannot result in the formation of new phase in the alloy.Inaddition,the 0.5%TiC particle addition can improve the mechanical properties,creep resistance and castability of the magnesium alloy,in which the improvement of castability is possible attributed to the adjustment of solidified temperature range with TiC addition.

关 键 词：ZA84镁合金 TIC 凝固行为 Mg32(Al Zn)49相 

分 类 号：TG136.1[一般工业技术—材料科学与工程]