半固态工艺制备纳米SiC颗粒增强AM60镁合金的研究  

Study on SiC Nanoparticles Reinforced AM60 Magnesium Alloys Fabricated by Semisolid Process

作　　者：康永林[1] 王朝辉[1] 

机构地区：[1]北京科技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S1期327-329,共3页Special Casting & Nonferrous Alloys

基　　金：国家863项目(2006AA03Z115);国家973项目(2006CB605203-2)

摘　　要：使用半固态复合工艺,制备了纳米SiC颗粒增强AM60镁合金材料。利用光学显微镜、布氏硬度计和MTS材料试验机等设备研究了纳米SiC颗粒对镁合金的显微组织、力学性能和硬度等的影响。结果表明,在镁合金中添加纳米SiC颗粒能够细化其组织,提高材料的综合力学性能。当纳米颗粒体积分数加入量为0.1%时,镁合金的综合性能达到最好,屈服强度、抗拉强度和伸长率分别较未添加纳米颗粒的镁合金提高了56.9%、19.2%和69.3%,其硬度和冲击功也分别提高了16.4%和18.8%。同时,对纳米SiC颗粒对镁合金的强韧化机理进行了探讨。The SiC nanoparticles reinforced AM60 magnesium alloys were fabricated by semisolid process.The effects of SiC nanoparticles on microstructure and mechanical properties of AM60 have been investigated by optical microscope,Brinell hardness tester and MTS material testing machine etc.The results show that the microstructure and mechanical properties of magnesium alloys can be improved withthe addition of SiC nanoparticles.In terms of mechanical properties,the optimal addition of SiC nanoparticles is 0.1%.Under this condition,theincrease extent of yield strength,tensile strength,elongation,hardness and impact energyof AM60 magnesium alloys are 56.9%,19.2%,69.3%,16.4% and 18.8% of those of original alloys,respectively.The mechanisms of strengthening and toughening of magnesium alloys with SiC nanoparticles are also discussed.

关 键 词：镁合金 纳米SIC颗粒 半固态 显微组织 力学性能 

分 类 号：TG249.9[金属学及工艺—铸造]