摘要
研究了工频电磁场对水平连铸10mm的Al-1Si合金键合线铸坯表面质量、凝固组织、溶质偏析和力学性能的影响。试验结果表明,在工频电磁场作用下,铸坯的表面质量得到了改善,当励磁电流达到100A时,表面粗糙度由未施加电磁场时的40μm降为20μm;凝固组织得到了细化,晶粒尺寸均匀;溶质偏析得到了抑制,Si元素在α(Al)基体中的固溶度及其分布的均匀性得到提高;并且力学性能得到了改善,抗拉强度和伸长率分别提高了16·5%和36%。
Effects of industrial frequency electromagnetic field on surface quality,solidification structure,solute segregation and mechanical properties of Al-1Si alloy wire billets with 10 mm in diameters in horizontal continuous castings have been investigated.The results show that the surface quality of the billets can be greatly improved,where the surface roughness is decreased from 40 μm to 20 μm with exciting current of 100 A.The microstructure of the Al-1Si alloy can be refined with uniform grain size.The solid solution degree of Si element and its distributed uniformity in α(Al) matrix can be improved as a result of restraining solute segregation.Based on above reasons,the tensile strength and elongation of the Al-1Si alloy wire billets are increased by 16.5% and 36% respectively.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第6期462-464,共3页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50474055)
关键词
水平连铸
工频电磁场
Al-1Si合金
Horizontal Continuous Casting,Industrial Frequency Electromagnetic Field,Al-1Si Alloy
