采用氧气雾化法制备出Ti6Al4V预合金粉末,并对粉末的粒度分布、形貌和微观结构进行了研究.结果表明:所制备的粉末颗粒细小,粒度呈正态分布.粉末大部分为球形或近球形,粉末表面为近似六边形胞状组织,大颗粒粉末表面相对较为粗糙,并伴有少量的卫星颗粒,小颗粒粉末表面光滑,并且没有黏附卫星颗粒.粉末的内部组织呈现为胞状结构,组织细小均匀.粉末主要由α相胞晶和细针状马氏体α ′组成,这都是快速凝固所形成的；随着粉末粒度的减小,针状相数量和尺寸减小,并且部分发生球化形成细小的球化相.粉末表面存在一定的成分偏析以及碳、氧元素污染,氧化膜的厚度约为30μm.
参考文献
| [1] | Y. Liu;L.F. Chen;H.P. Tang;C.T. Liu;B. Liu;B.Y. Huang .Design of powder metallurgy titanium alloys and composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):25-35. |
| [2] | 黎俊初,王晗,张国光,陈同彩.固溶时效对热等静压制得的TC4钛合金组织与性能的影响[J].热加工工艺,2007(10):65-67. |
| [3] | F.H. Froes;S.J. Mashl;V.S. Moxson .The Technologies of Titanium Powder[J].JOM,2004(11):46-48. |
| [4] | Schulz G.Some applications of ultrafine,gas atomized metal powder beyond classical powder metallurgy[A].Japan:The Japan society of powder and powder metallurgy,2000:475. |
| [5] | Mitkov M;Bozic D .Hydride-dehydride conversion of solid Ti6A14V to powder form[J].Materials Characterization,1996,37(2-3):53-60. |
| [6] | C.R.F. Azevedo;D. Rodrigues;F. Beneduce Neto .Ti-Al-V powder metallurgy (PM) via the hydrogenation-dehydrogenation (HDH) process[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2003(1/2):217-227. |
| [7] | A.G.Dowson .Atomization dominates powder production[J].Metal Powder Report,1999(1):15-17. |
| [8] | Moll J H;Yolton C F;Mctiernan B J .PM processing of titanium aluminides[J].International Journal of Powder Metallurgy,1990,26(02):149-155. |
| [9] | Lavernia E J;Ayers J D .Rapid solidification processing with specific application to aluminum alloys[J].International Materials Reviews,1992,37(01):1-40. |
| [10] | Rao P .Shape and other properties of gas atomized metal powders[D].Philadelphia:Drexel University,1973. |
| [11] | Jones H. .A perspective on the development of rapid solidification and nonequilibrium processing and its future[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2001(0):11-19. |
| [12] | Dunkley J J;Palmer J D .Factors affecting particle size of atomized metal powder[J].Powder Metallurgy,1986,29(04):287-290. |
| [13] | Strauss J T;Miller S A.Effect of melt superheat on powder charateristics produced by close-coupled gas atomization[J].Advanced Powder Metallurgy & Particulate Materials,1996(part 1):55-65. |
| [14] | Uslan I;Saritas S;Davies T J .Effect of variables on size and characteristics of gas atomized aluminium powders[J].Powder Metallurgy,1999,42(02):157-160. |
| [15] | Dreshfied R L;Miner R V Jr .Effect of thermally induced porosity on an as-HIP powder metallurgy superalloy[J].Powder Metallurgy International,1980,12(02):83-87. |
| [16] | Miner R V;Dreshfield R L .Effect of fine porosity on fatigue of a powder metallurgy superalloy[J].Metallurgical and Materials Transactions,1981,12A:261-267. |
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%