【摘 要】
：
We have experimentally determined the as-cast structures of semi-continuous casting 7075 aluminum alloy obtained in the pres-ence of dual-frequency electromagne
【机 构】
：
The Key Laboratory of the Ministry of Education of China for Electromagnetic Processing of Materials
论文部分内容阅读
We have experimentally determined the as-cast structures of semi-continuous casting 7075 aluminum alloy obtained in the pres-ence of dual-frequency electromagnetic field. Results suggest that the use of dual-frequency electromagnetic field during the semi-continuous casting process of 7075 aluminum alloy ingots reduces the thickness of the surface segregation layer, increases the height of the melt menis-cus, enhances the surface quality of the ingot, and changes the surface morphology of the melt pool. Moreover, low-frequency electromag-netic field was found to show the most obvious influence on improving the as-cast structure because of its high permeability in conductors.
其他文献
The isothermal reduction of the Panzhihua titanomagnetite concentrates (PTC) briquette containing coal under argon atmosphere was investigated by thermogravimet
A novel method was developed for extracting alumina (Al2O3) from fly ash using an ammonium hydrogen sulfate (NH4HSO4) roasting process, and the thermodynamics a
The mechanical properties of Al-Cu-Mn casting alloy mainly depend on the morphology,distribution,size,and number ofθ′(Al2Cu)precipitates.In this study,we have
Atomic oxygen(AO)is considered the most erosive particle to spacecraft materials in low earth orbit(LEO).Carbon fiber,carbon/carbon(C/C),and some modified C/C c
The effects of intermediate annealing (IA) on the microstructure and texture of Ni-9.3at%W substrates have been investigated by using electron backscattering di
Aluminium-based metal matrix composites were synthesized from Al-TiO2-Gr powder mixtures using the powder metallurgy technique and their forming characteristics
研究了不同的型壳保温温度对一种铸造单晶高温合金DD98铸态组织、热处理组织和持久性能的影响。结果表明,随着上下区型壳保温温度的升高,固液界面前沿的温度梯度增大,而糊状
以玉米淀粉和乙醛酸,三乙醇胺为主要原料,制备了改性淀粉膜.研究了不同乙醛酸用量对淀粉膜的力学性能、水溶性能、吸湿率的影响,并对乙醛酸淀粉膜进行了DSC热分析.确定出适宜
从人员素质、仪器设备、测试环境、分析方法及布点、采样、分析等环节分析了目前影响环境监测质量的几大因素,并从环境监测过程的实际出发提出质量控制和质量保证的方法和建议。
Brass ash from the industrial brass manufacturer in Turkey was leached using the solutions of ionic liquid(IL)1-butyl-3-methyl-imidazolium hydrogen sulfate([bmi