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材料研究学报  2012, Vol. 26 Issue (3): 267-273    
  研究论文 本期目录 | 过刊浏览 |
电磁搅拌频率对Pb--Sn过共晶合金凝固组织的影响
郭建设1,赵倩1,侯晓光2, 房灿峰1,张兴国1
1.大连理工大学材料科学与工程学院~~大连~116023
2.上海宝山钢铁集团~~上海~201900
Effects of Electromagnetic Stirring Frequency on the Solidification Structure of Pb–Sn Hypereutectic Alloy
GUO Jianshe1, ZHAO Qian1,  HOU Xiaoguang2, FANG Canfeng1,  ZHANG Xingguo1
1.School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023
2.Shanghai Baosteel Group, Shanghai 201900
引用本文:

郭建设 赵倩 侯晓光 房灿峰 张兴国. 电磁搅拌频率对Pb--Sn过共晶合金凝固组织的影响[J]. 材料研究学报, 2012, 26(3): 267-273.
, , , , , , , . Effects of Electromagnetic Stirring Frequency on the Solidification Structure of Pb–Sn Hypereutectic Alloy[J]. Chin J Mater Res, 2012, 26(3): 267-273.

全文: PDF(1008 KB)  
摘要: 对比分析了磁场和电磁搅拌频率对Pb--80%Sn过共晶合金铸锭凝固组织和宏观成分偏析的影响。结果表明:螺旋磁场可在合金熔体的更大区域内形成流动, 使熔体内溶质场、温度场分布更均匀。励磁电流一定时, 初生相晶粒尺寸随频率的增大而减小, 旋转磁场和螺旋磁场在频率分别为13 Hz和10 Hz时对铸锭凝固组织的改善效果最好, 晶粒尺寸由无磁场时的247.3 μm分别减小到142.5 μm、140.6 μm, 继续增大频率, 凝固组织反而出现粗化和不均匀化。旋转磁场和螺旋磁场均在频率为13 Hz时对成分偏析的改善效果最好, 由无磁场时的9.71%分别减小到1.14%、0.34%。
关键词 金属材料电磁搅拌磁场频率凝固组织Pb--Sn过共晶合金    
Abstract:The effects of electromagnetic stirring frequency on solidification structure and macro composition segregation of Pb–80%Sn hypereutectic alloy cast ingot were investigated and compared with that without magnetic field. The results show that the spiral magnetic field can make the distribution of solute and temperature field more uniform than that of rotating magnetic field for the formation of larger zone stirring in the ingot. For a fixed excitation current, the grains size of primary phase decreases with the increasing of frequency, and an optimal effect can be obtained when the frequency reaches 13 Hz for rotating magnetic field and 10 Hz for spiral magnetic field. The grains sizes can reduce to 142.5 μm and 140.6 μm from 247.3 μm in the absence of magnetic field respectively. However, the solidification structure will coarsen and non-homogenize as the frequency increases. The composition segregation can be the minimum when the frequency is 13 Hz for both rotating and spiral magnetic field, which are reduced from 9.71% under no magnetic field to 1.14% and 0.34% severally.
Key wordsmetallic materials    electromagnetic stirring    magnetic field frequency    solidification structure    Pb-Sn hypereutectic alloy
收稿日期: 2012-03-01     
ZTFLH: 

TG113

 
基金资助:

国家自然科学基金50875031和宝钢高新技术10K029ECES资助项目。

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