采用X射线能谱仪和X-ray Mapping对反应产物进行分析,由Al-Si合金中不同Sr,B含量时枝晶α和共晶Si形态与大小的变化,考察了Sr与B的交互作用.研究发现: Al-1B中间合金在经Sr变质处理的近共晶Al-Si合金中具有强的枝晶细化能力,而Sr的存在对B的枝晶细化效果起一定的促进作用; 但当合金中Sr和B含量较高时存在互毒化现象,这是由于Sr与B摩尔比接近3∶4的未知化合物形成时消耗了熔体中大量的Sr和B.Sr-B化合物的发现为Sr,B间互毒化机理提供了直接依据.
参考文献
| [1] | B. Kulunk;D.J. Zuliani .Applications for the Strontium Treatment of Wrought and Die-Cast Al[J].JOM,1996(10):60-63. |
| [2] | Mahmoud H F;Toshiro K .Mechanical properties of modified and nonmodified eutectic Al-Si alloys[J].Japanese Journal of Institute of Light Metals(Japan),1994,44(01):28-34. |
| [3] | Yilmaz F;Atasoy O A;Elliott R .Growth structures in aluminium-silicon alloys(Ⅱ): the influence of strontium[J].Journal of Crystal Growth,1992,118:377-384. |
| [4] | M. Djurdjevic;H. Jiang;J. Sokolowski .On-line prediction of aluminum-silicon eutectic modification level using thermal analysis[J].Materials Characterization,2001(1):31-38. |
| [5] | Shan-Noon Yie;Sheng-Long Lee;Yu-Huan Lin;Jing-Chie Lin .Mechanical properties of Al-11%Si casting alloys containing trace Be and Sr[J].Materials transactions,1999(4):294-300. |
| [6] | Dong J X;Karnezis P A;Durrant G et al.Effect of Sr and Fe additions on the microstructure and mechanical properties of a direct squeeze cast Al-7Si-0 3Mg alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1999(30):1341-1356. |
| [7] | 廖恒成 .近共晶Al-Si合金组织细化与力学性能的研究[D].东南大学,2000. |
| [8] | 廖恒成,丁毅,孙国雄.Sr对近共晶Al-Si合金中α枝晶生长行为的影响[J].金属学报,2002(03):245-249. |
| [9] | LIAO Heng-cheng;DING Yi;SUN Guo xiong .Correlation between mechanical properties and amount of dendritic α(Al) phase in as-cast near-eutectic Al-11 6%Si alloys modified with strontium[J].Materials Science and Engineering A,A335:62-66. |
| [10] | 廖恒成;丁毅;孙国雄 .Sr变质近共晶Al--Si合金力学性能与枝晶α数量之间的相关性[J].铸造,51(03):148-152. |
| [11] | LIAO Heng-cheng;DING Yi;SUN Guo xiong .Effect of strontium on the crystallization of Mg2Si phase in Al-Si-Mg casting alloys[J].Transactions of Nonferrous Metals Society of China,12(03):409-413. |
| [12] | Lu H T;Wang L C;Kung S K .Grain refining in A356 alloys[J].Journal of Chinese Foundryman's Association,1981,29(01):10-18. |
| [13] | Sigworth G K;Guzowski M M .Grain refining of hypoeutectic Al-Si alloys[J].AFS Transactions,1985,93:907-912. |
| [14] | Apelian D;Cheng J A .Al-Si processing variables: effect on grain refinement and modification[J].AFS Transactions,1986,94:797-808. |
| [15] | Sritharan T;Li H .Influence of Ti to B ratio on the ability to grain refine Al-Si alloy[J].Journal of Materials Science and Technology,1997,63(1-3):585-580. |
| [16] | 廖恒成.Al-5%Ti-1%B对Sr变质Al-13.0%Si合金组织影响的研究[J].铸造,2000(05):251. |
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