RE对Al-5Ti-0.25C细化性能的影响  

Effects of rare earth on refining capability of Al-5Ti-0.25C

作　　者：张保丰[1] 岳金胜[2] 李中伟[2] 赵红亮[2] 

机构地区：[1]黄河科技学院,河南郑州450063 [2]郑州大学,河南郑州450002

出　　处：《轻合金加工技术》2013年第1期33-36,共4页Light Alloy Fabrication Technology

基　　金：郑州市科技创新团队资助项目(10CXTD159);河南省教育厅科学技术研究重点项目(12B450001)

摘　　要：采用光学显微镜(OM)和X射线衍射仪(XRD)等分析手段,研究了RE对Al-5Ti-0.25C细化性能的影响,并对其细化机制进行了分析探讨。结果表明,加入质量分数为0.5%的Al-5Ti-0.25C中间合金能将3003铝合金晶粒尺寸细化至403μm,而Al-5Ti-0.25C-2RE中间合金中由于RE元素的加入,w(Al-5Ti-0.25C-2RE)=0.5%的中间合金可将3003铝合金晶粒尺寸细化至172μm。RE元素能够促进TiC粒子和TiAl3相生成,并促进TiC粒子在基体中均匀弥散分布,改变TiAl3形貌,还能与熔体发生反应生成Ti2Al20Ce相。The effect of rare earth on the refining capability has been studied by optical microscopy （OM） and X-ray diffraction （XRD）, and the refining mechanism has been investigated as well. The results show that during 3003 alloy refining experiment the grain size has been refined to 403 μm by 0.5 （wt） % addition of Al-STi-0.25C master alloy. But the grain size of 3003 has been refined to 172 μm by addition of 0.5 （wt） % Al-STi-0.25C-2RE master alloy,because the rare earth has been mixed into the Al-STi-0.25C master alloy. The rare earth element can promote the production of TiC and TiAl3 particle phases, and promote the TiC particles homogeneously distributed in the matrix, change the morphology of TiAl3, and generate Ti2Al20Ce phases by reacting with the melt.

关 键 词：AL-TI-C中间合金 稀土元素 晶粒细化 细化性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]