摘要
研究了低频电磁半连续铸造7A60合金铸锭的合金元素在晶内的固溶状况和力学性能。结果表明:适当降低电磁场频率和增强电磁场强度,有利于提高合金元素Zn、Mg和Cu在晶内的固溶度、锭坯的维氏硬度、抗拉强度和延伸率。频率为15Hz,安匝数为20kA·turn时,Zn、Mg和Cu元素相对溶质固溶百分数最高,分别为68.8%、76.0%和45.0%;频率为15Hz,安匝数为20kA·turn时,锭坯维氏硬度最高为Hv160;频率为25Hz,安匝数为20kA·turn时,抗拉强度最高为324MPa。
The intracrytalline solubility of alloy elements and mechanical properties of 7A60 Al alloy billets cast by low frequency electromagnetic casting were investigated. The results show that the relative intracrytalline solubility of alloy elements(Zn, Mg and Cu) and mechanical properties, Vicker hardness, ultimate tensile strength and elongation are increased with decreasing electromagnetic frequency and increasing electromagnetic intensity. When the frequency is 15Hz and number of ampere turns is 20kA·turn, relative intracrytalline solubility of alloy elements (for Zn, Mg and Cu the solubility are 68.8%, 76.0% and 45.0%, respectively) is the highest; when the frequency is 15Hz and number of ampere turns is 20kA·turn, Vicker hardness is the highest of Hv160; when the frequency is 25Hz and number of ampere turns is 20kA·turn, ultimate tensile strength is the highest of 324MPa.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2004年第1期117-121,共5页
The Chinese Journal of Nonferrous Metals
基金
十五863"项目(2001AA332030)
关键词
超高强铝合金
低频电磁铸造
固溶
力学性能
合金元素
low frequency
electromagnetic casting
intracrytalline solubility of alloy element
Al-Zn-Mg-Cu-Zr
