通过数值模拟与试验研究的方法,采用软接触电磁铸造技术制备7050高强铝合金扁铸锭.模拟结果表明,施加软接触电磁场后,铸锭内部的流动场和温度场分布均发生改变.试验结果表明:采用电磁软接触铸造技术后,铸锭表面粗糙度由常规铸造时的101.1 (m降低至48.6 (m,平均晶粒由常规铸造时的80～85 (m细化至55～ 70 (m,晶粒尺寸不均匀度由常规铸造的21.69%降低至11.50%;此外,采用电磁软接触铸造工艺后,铸锭的合金化元素偏析得到抑制,Zn、 Mg、 Cu三元素的最大偏析率分别由常规铸造时的6.62%、9.54%、7.92%降低至3.87%、3.63%、1.36%,合金化元素分布更加均匀.
参考文献
| [1] | GETSELEV Z V .Casting in an electromagnetic field[J].Journal of Metals,1971,23(10):38-44. |
| [2] | Lavers J.D.;Biringer P.P. .Electromagnetic transport and confinement of liquid metals[J].IEEE Transactions on Industry Applications,1989(3):495-502. |
| [3] | 贾非,曹志强,张兴国,郝海,金俊泽.电磁铸造2024铝合金组织性能研究[J].大连理工大学学报,2001(05):572-577. |
| [4] | VIVES C .Electromagnetic refining of aluminum alloys by the CERM process (part Ⅰ):Working principle and metallurgical results[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1989,20:623-630. |
| [5] | VIVES C .Electromagnetic refining of aluminum alloys by the CREM process (part Ⅱ):Specific practical problems and their solutions[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1989,20:631-643. |
| [6] | 董杰,崔建忠,赵志浩.低频电磁铸造超高强高韧铝合金元素晶内固溶度和力学性能研究[J].航空材料学报,2003(01):16-20. |
| [7] | Cao ZQ.;Jia F.;Zhang XG.;Hao H.;Jin JZ. .Microstructures and mechanical characteristics of electromagnetic casting and direct-chill casting 2024 aluminum alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(2):133-137. |
| [8] | 段玉波,唐剑,刁文武,牟力强.化学成分对7050合金扁锭成型性能的影响[J].重庆大学学报(自然科学版),2004(04):100-102,117. |
| [9] | 李军;王同敏;蔡少武;许菁菁,王家淳,曹志强,李廷举.硬铝合金软接触电磁连铸矩形结晶器透磁性能模拟[J].特种铸造及有色合金,2008(z1):523-525. |
| [10] | 毕德显.电磁场理论[M].北京:电子工业出版社,1985:300-325. |
| [11] | 蔡圣善;朱耘.经典电动力学[M].上海:复旦大学出版社,1984:20-37. |
| [12] | STRATTON J A.Electromagnetic theory[M].New York:mcgraw-hill Book Company,inc,1987:273-279. |
| [13] | 韩至成.电磁冶金学[M].北京:冶金工业出版社,1996:145-146. |
| [14] | 曹志强,贾非,张兴国,金俊泽,郝海,金锡元.电磁铸造与普通连续铸造2024铝合金的组织性能对比[J].材料工程,2002(06):37-39. |
| [15] | 房灿峰,贾非,金俊泽,亓锋,李廷举.铝合金的软接触电磁连铸研究[J].铸造,2004(05):350-353. |
| [16] | YU H;GRANGER D A.Macrosegregation in aluminum alloy ingot cast by the semicontinuous direct chill (DC) method[A].UK:EMAS,1986:17-29. |
| [17] | DORWARD R C;BEERNTSEN D J.Effects of casting practice on macrosegregation and microstructure of 2024 alloy billet[J].Light Metals,1990:919-924. |
| [18] | Rerko RS.;de Groh HC.;Beckermann C. .Effect of melt convection and solid transport on macrosegregation and grain structure in equiaxed Al-Cu alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):186-197. |
| [19] | Christopher J. Vreeman;Matthew John M. Krane;Frank P. Incropera .The effect of free-floating dendrites and convection on macrosegregation in direct chill cast aluminum alloys part I: model development[J].International Journal of Heat and Mass Transfer,2000(5):677-686. |
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%