采用光学金相显微镜、扫描电镜、X射线、DSC等分析手段研究了1973高强铝合金铸态和均匀化态的显微组织和成分分布.结果表明:合金铸态组织为枝晶结构,主要存在α-Al,MgZn2(η相)和Al2CuMg(S相),还存在少量的Al13(FeCu)4相.其中MgZn2相中固溶部分Al原子和Cu原子,Al2CuMg相中固溶分布Zn原子.该合金合适的均匀化处理工艺为470℃/24h.均匀化后,原铸态合金中的MgZn2(η相)和Al2CuMg(S相)回溶到基体,仅残留少量Al13(FeCu)4相和Al7Cu2Fe相,晶内析出大量弥散分布的球形Al3Zr粒子.
参考文献
| [1] | 王洪,付高峰,孙继红,李兴杰,姜澜.超高强铝合金研究进展[J].材料导报,2006(02):58-60. |
| [2] | 贺永东,张新明,游江海.7A55合金均匀化处理[J].中国有色金属学报,2006(04):638-644. |
| [3] | 田福泉,李念奎,崔建忠.超高强铝合金强韧化的发展过程及方向[J].轻合金加工技术,2005(12):1-9. |
| [4] | 钟皓,韩逸,陈琦,邓祯祯,翁文凭,乐永康.7150铝合金铸态组织中第二相的形貌及相组成[J].特种铸造及有色合金,2008(02):106-108. |
| [5] | Robson JD. .Optimizing the homogenization of zirconium containing commercial aluminium alloys using a novel process model[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):219-229. |
| [6] | STILLER K;WARREN P J;HANSEN V et al.Investigation of precipitation in an Al-Zn-Mg alloy after two step aging treatment at 100℃and 150℃[J].Materials Science and Engineering A,2001,270:55-63. |
| [7] | PURDY G R;KIRKALKY J S .Homogenization by diffusion[J].Metallurgical Transactions,1971,2(02):371-378. |
| [8] | COLEG S .In homogeneities and their control via solidification[J].Metallurgical Transactions,1971,2(02):357-370. |
| [9] | FAN Xi-gang,JIANG Da-ming,MENG Qing-chang,LI Nian-kui,SUN Zhao-xia.Evolution of intermetallic phases of Al-Zn-Mg-Cu alloy during heat treatment[J].中国有色金属学会会刊（英文版）,2006(z3):1247-1250. |
| [10] | Mondal C;Mukhopadhyay AK .On the nature of T(Al2Mg3Zn3) and S(Al2CuMg) phases present in as-cast and annealed 7055 aluminum alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):367-376. |
| [11] | MUKHOPADHYAYA K .On the nature of the second phase particles present in as-cast Al-Cu-Mg-Ag alloy[J].Scripta Materialia,1999,41:667-672. |
| [12] | Fanyou Xie;Xinyan Yan;Ling Ding .A study of microstructure and microsegregation of aluminum 7050 alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):144-153. |
| [13] | MUKHOPADHYAY A K .Compositional characterization of Cu rich phase particles present in as-cast Al-Cu-Mg(-Li) alloys containing Ag[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1999,30:1693-1704. |
| [14] | 贺永东,张新明.微量Cr、Mn、Ti、Zr细化7A55铝合金铸锭组织的效果与机理[J].中国有色金属学报,2005(10):1594-1601. |
| [15] | FAN X G;JANG D M .The microstructure evolution of an Al-Zn-Mg-Cu alloy during homogenization[J].Materials Letters,2006,60:1475-1479. |
| [16] | LI Y J;ARNBERG L .A eutectoid phase transformation for the primary intermetallic particle form Alm(Fe,Mn) to Al3(Fe,Mn) in AA5182 alloy[J].Acta Materialia,2004,52:2945-2952. |
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%