通过分析比较共晶硅和析出相的数量、尺寸、形貌变化,研究了均匀化温度、均匀化时间和均匀化后的冷却速率对A390铝合金微观组织演变及布氏硬度的影响规律.结果表明:析出相的析出数量增加是均匀化处理后A390铝合金布氏硬度降低的主要原因,而共晶硅尺寸、形貌的改变对其影响较小.合金中析出相的析出数量主要受均匀化处理后的冷却速率影响,同一均匀化温度和时间下,随均匀化冷却速率的减小,析出相数量增多,布氏硬度迅速降低.均匀化处理后,共晶硅熔断粒化,Al2 Cu相发生分解和球化,Al5Cu2Mg8Si6相数量增加.
参考文献
| [1] | Liao H C,Sun Y,Sun G X .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,2002,335:62-66.,2002. |
| [2] | Kilaas R,Radmilovic V .Structure determination and structure refinement of Al2 CuMg precipitates by quantitative high-resolution electron microscopy[J].Ultramicroscopy,2001,88(1):63-72.,2001. |
| [3] | Lasa L,Rodriguez-Ibabe J M .Wear behavior of eutectic and hypereutectic Al-Si-Cu-Mg casting alloys tested against a composite brake pad[J].Material Science and Engineering A,2003,363:193-202.,2003. |
| [4] | Lasa L,Rodriguez-Ibabe J M .Characterization of the dissolution of the Al2 Cu phase in two Al-Si-Cu-Mg casting alloys using calorimetry[J].Material Characterization,2002,48(5):371-378.,2002. |
| [5] | 陆树荪,顾开道,郑来苏.有色铸造合金及熔炼[M].北京:国防工业出版社,1983.,1983. |
| [6] | 梁博,张志峰,陈春生,徐骏.均匀化退火对过共晶Al-17Si合金组织和性能的影响[J].金属热处理,2009(12):18-22. |
| [7] | Mondolfo L F.Aluminum Alloys:Structure and Property[M].Metallurgical Industry Press,Beijing,China,1988.,1988. |
| [8] | 朱培钺,刘启阳,侯廷秀.共晶硅粒状化过程[J].特种铸造及有色合金,1985(6):1-7.ZHU Pei-yue,LIU Qi-yang,HOU Ting-xiu.Granulation process of eutectic silicon[J].Special Casting & Nonferrous Alloys,1985 (6):1-7.,1985. |
| [9] | Porter D A,Easterling K E.Phase Transformations in Metals and Alloys[M].New York:Van Nostrand Reinhold Co,1981:62-69.,1981. |
| [10] | 崔忠圻.金属学与热处理[M].哈尔滨:哈尔滨工业大学出版社,1989.,1989. |
| [11] | Emma S,Salem S .The heat treatment of Al-Si-Cu-Mg casting alloys[J].Journal of Materials Processing Technology,2010,210 |
| [12] | Eivani A.R,Zhou J,Duszczyk J.Recent Trends in Processing and Degradation of Aluminium Alloys[M].United States:InTech,2011.,2011. |
| [13] | Lasa L,Rodriguez-Ibabe J M .Characterization of the dissolution of the Al2 Cu phase in two Al-Si-Cu-Mg casting alloys using calorimetry[J].Mater Charact,2002,48 |
| [14] | 顾景诚.铝合金时效过程[J].轻合金加工技术,1985(3/4):25-28.GU Jing-cheng.Aging process of aluminum alloys[J].Light Alloy Fabrication Technology,1985 (3/4):25-28.,1985. |
| [15] | 金头男,尹志民,肖严庆 .LD10合金的时效特性[J].轻合金加工技术,1996,24 |
| [16] | Allen T,Lidcombe C A .Preaging effects in Al-7% Si-Mg foundry alloys aluminum[J].Jahragang,1990,11(2):1-83.,1990. |
| [17] | Kang H G,Kida M,Miyahara H,et al .Age-hardening characteristics of Al-Si-Cu-base cast alloys[J].AFS Trans,1999,107 |
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%