测试分析新型电磁搅拌器内螺旋磁场和旋转磁场的磁感应强度、分布和作用规律,研究螺旋磁场对Pb-80％Sn过共晶合金凝固组织影响的作用机理,并与无磁场和旋转磁场条件下合金凝固组织的形貌特征及成分分布进行对比分析.结果表明:螺旋磁场相比于旋转磁场可以在铸锭内部更大区域内形成均匀搅拌,更易于破碎和细化枝晶组织,既能促进椭球或球状晶的生成,又能更好地改善宏观偏析;在频率一定的情况下,初生相晶粒尺寸随着励磁电流的增大而减小；当励磁电流为125 A时,旋转磁场和螺旋磁场细化晶粒的效果最好；继续增大电流,晶粒产生粗化；螺旋磁场可基本消除成分偏析,并在较小励磁电流(100A)下达到采用旋转磁场(125A)时的最佳搅拌效果.
参考文献
| [1] | VIVES C .Solidification of tin in the presence of electric and magnetic field[J].Journal of Crystal Growth,1986,76(01):170-184. |
| [2] | 毛大恒;严宏志 .电磁搅拌对铝及其合金凝固和铸态组织的影响[J].轻合金加工技术,1991,19(04):10-16. |
| [3] | GARNIER M .Electromagnetic processing of liquid materials in Europe[J].ISIJ International,1990,30(01):1-7. |
| [4] | Willers, B;Eckert, S;Michel, U;Haase, I;Zouhar, G .The columnar-to-equiaxed transition in Pb-Sn alloys affected by electromagnetically driven convection[J].Materials Science & Engineering. A, Structural Materials: Properties, Microstructure and Processing,2005(1-2):55-65. |
| [5] | ECKERT S;WILLERS B;NIKRITYUK P A;ECKERT K MICHEL U .Application of a rotating magnetic field during directional solidification of Pb-Sn alloys:Consequences on CET[J].Materials Science and EntgineeringA,2005,413/414:211-216. |
| [6] | Zhao Chen;XiaoLi Wen;ChangLe Chen .Fluid flow and microstructure formation in a rotating magnetic field during the directional solidification process[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(1/2):395-401. |
| [7] | METAN V;EIGENFELD K;RABIGER D;LENOHARDT M ECKERT S .Grain size control in Al-Si alloy by grain refmement and electromagnetic stirring[J].Jonrnal of Alloys and Compounds,2009,487(1/2):163-172. |
| [8] | ZHOU Shu-cai,BAI Chen-guang,LEI Ya,REN Zheng-de,CAO Peng-jun,YANG Zhi-li.Effect of low-frequency rotary electromagnetic-field on solidification structure of continuous casting austenitic stainless steel[J].中南大学学报（英文版）,2009(03):360-364. |
| [9] | 张琦,金俊泽,王同敏,李廷举,郭庆涛.金属液在旋转电磁搅拌器作用下的流动分析[J].中国有色金属学报,2007(01):98-104. |
| [10] | 吴存有,周月明,侯晓光.电磁搅拌技术的发展[J].世界钢铁,2010(02):36-41. |
| [11] | 王宝峰,李建超.电磁搅拌技术在连铸生产中的应用[J].鞍钢技术,2009(01):1-5. |
| [12] | Hideyuki YASUDA;Takehiko TOH;Kazuhiko IWAI;Kazuki MORITA .Recent Progress of EPM in Steelmaking, Casting, and Solidification Processing[J].ISIJ International,2007(4):619-626. |
| [13] | 邢文彬;许诚信;房彩刚;毛斌 王世郁 .新型螺旋磁场电磁搅拌的冶金效果[J].北京科技大学学报,1991,13(02):110-115. |
| [14] | 赵倩,房灿峰,侯晓光,韩彦博,张楠,张兴国.螺旋磁场对金属凝固过程中成分偏析的影响[J].特种铸造及有色合金,2011(06):495-500. |
| [15] | 王红霞,许春香,徐林,梁伟,韩富银.旋转磁场对Pb-Sn-Sb合金组织及性能的影响[J].材料科学与工艺,2009(01):70-74. |
| [16] | Dong J;Cui JZ;Ding WJ .Theoretical discussion of the effect of a low-frequency electromagnetic vibrating field on the as-cast microstructures of DC Al-Zn-Mg-Cu-Zr ingots[J].Journal of Crystal Growth,2006(2):179-187. |
| [17] | 许广济,尹建军,丁雨田,寇生中,胡勇,王志华.方波脉冲电流对ZA27合金凝固组织的影响[J].机械工程学报,2006(01):47-51. |
| [18] | 周亮,唐萍,李永祥.小方坯结晶器电磁搅拌磁场测试与分析[J].钢铁钒钛,2006(04):10-13. |
| [19] | 谢辉,丁雨田,郭学锋,许广济.电磁搅拌对Al-5 wt%Cu初生相形貌的影响[J].热加工工艺,2000(06):5-7. |
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%