采用X射线衍射(XRD)、扫描电镜(SEM)、光学显微镜(0M)等实验手段研究重熔过程中Al-5Ti-B合金的微观组织演变及其对纯铝的晶粒细化作用.结果表明:在730℃时,随着重熔体保温时间的增加,原来弥散分布的TiB2发生偏聚,并被α-Al推向晶界处.在1000℃时,随着保温时间的增加,不仅TiB2发生偏聚,而且TiAl3的大小和形态均发生显著变化,TiAl3的形貌由块状转变为粗大的长条状和针片状.重熔后的Al-5Ti-B合金仍具有较好的晶粒细化作用.
参考文献
| [1] | Pourkia, N.;Emamy, M.;Farhangi, H.;Ebrahimi, S.H.S. .The effect of Ti and Zr elements and cooling rate on the microstructure and tensile properties of a new developed super high-strength aluminum alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(20):5318-5325. |
| [2] | Sigworth G K.Fundamentals of grain refining in aluminum alloys castings[J].Light Metals,1998:75-85. |
| [3] | Cahoon J R;Tandon K N;Chatarued M C.Effect of gravity level on grain refinement in Al alloys[J].METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,1992:233399-233404. |
| [4] | 王正军,刘莲香.Al-Ti-C中间合金晶粒细化剂的制备[J].热加工工艺,2009(23):76-78. |
| [5] | He Y D;Zhang X M;Cao Z Q .Effect of minor Cr,Mn,Zr,Ti and B on grain refinement of as-cast Al-Zn-Mg-Cu alloys[J].Rare Metal Mater Eng,2010,39:1135-1141. |
| [6] | 胡咏梅,刘政.Al-5Ti-B和稀土Y复合添加对A356合金半固态凝固组织的影响[J].铸造,2011(09):869-874. |
| [7] | 肖政兵,邓运来,唐建国,陈祺,张新明.Al-Ti-C与Al-Ti-B晶粒细化剂的Zr中毒机理[J].中国有色金属学报,2012(02):371-378. |
| [8] | LI Jian-guo,HUANG Min,MA Mo,YE Wei,LIU Dong-yu,SONG Dong-ming,BAI Bing-zhe,FANG Hong-sheng.Performance comparison of AlTiC and AlTiB master alloys in grain refinement of commercial and high purity aluminum[J].中国有色金属学会会刊（英文版）,2006(02):242-253. |
| [9] | 王淑俊 .含Zr铝合金的细化“中毒”现象及其细化新工艺研究[D].山东大学,2009. |
| [10] | D. QIU;J.A. TAYLOR;M.-X. ZHANG .Understanding the Co-Poisoning Effect of Zr and Ti on the Grain Refinement of Cast Aluminum Alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2010(13):3412-3421. |
| [11] | 任峻,陶钦贵,马颖.Al-Ti-B合金晶粒细化剂及细化机理的发展与现状[J].铸造技术,2007(01):69-73. |
| [12] | Guzowiki M M;Sigworh G K;Sentner D A .The role of boron in the grain refinement of aluminum with titanium[J].Metallurgical Transactions,1987,18A(04):603-619. |
| [13] | 许春香,张金山.AlTiC中间合金组织遗传性的研究[J].材料科学与工艺,2001(02):166-168,174. |
| [14] | 陈小番,王义仁.Al-Ti-B晶粒细化剂的研究进展[J].南方金属,2010(05):5-8,25. |
| [15] | 刘相法,边秀房.TiAl3在铝熔体中结构遗传的动力学研究[J].机械工程学报,1999(03):67. |
| [16] | 丁万武,夏天东,赵文军.TiAl3对TiC粒子在铝熔体中沉淀特性的影响机理[J].材料工程,2013(03):10-15. |
| [17] | 夏天东,丁万武,赵文军,王晓军,徐仰涛.TiAl_3对TiC粒子在铝基体中分布及α（Al）晶粒形核的影响[J].中国有色金属学报,2009(11):1948-1955. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%