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Effect of compound field on horizontal continuous casting of Al-1wt.%Si alloy

China Foundry 2015年第2期12卷 123-128页

作者： Zhong-tao Zhang Hong-yun Yue Jian Zhang Shu-ting Yang Ting-ju Li School of Chemical Science Henan Normal University Golden Dragon Precise Copper Tube Group Beijing Self-creation Electric Company School of Materials Science and Engineering Dalian University of Technology

A travel ing magnetic field, a power ultrasonic field, and a compound field were used separately during the horizontal continuous casting process of Al-1wt.%Si al oy. The samples obtained were characterized using an optical microscope, a scanning electron microscope, a tensile testing machine, and an electron probe microscopic analyzer to test the microstructures, properties, and element distribution of the samples. The results show that the application of a single ifeld can enhance the mechanical properties and reduce the segregation of Si element in Al-1wt.%Si alloy to some extent. The application of a compound field can obtain the best reifnement and homogeneity of the Si element in the al oy, leading to the highest increase of tensile strength and elongation among the three applied ifelds. The mechanism of the action of external ifelds on the reifnement of microstructures and homogeneity of the Si element is discussed and the compound ifeld is considered to be an effective method to achieve high quality Al alloys.

关键词： ultrasonic vibration travelling magnetic field grain refinement nucleation compound field

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Microstructure evolution of 3003/4004 clad ingots under diverse physical fields

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Transactions of Nonferrous Metals Society of China 2013年第9期23卷 2496-2501页

作者：付莹接金川张宇博钟德水李继展李廷举大连理工大学材料科学与工程学院大连116024

In order to improve the quality of clad ingots, diverse physical fields including electromagnetic stirring, power ultrasonic and compound field of ultrasonic and electromagnetic stirring were attempted to prepare clad ingots of 3003/4004 alloys. The solidification structures near the interface in clad ingots were investigated. The experiment results indicate that the solidification structure of 4004 alloy changes from dendritic crystals to petal-like grains when the clad ingot is treated by electromagnetic stirring. With the effect of power ultrasonic, the solidified microstructure of 4004 alloy exhibits the refinement of both primary a（A1） and eutectic silicon. Under the compound field, the primary a（A1） is refined, the morphology of eutectic silicon has a transition from a coarse plate-like form without treatment or thin acicular-like form with power ultrasonic to fine coral-like form.

关键词： A1 alloy clad ingot power ultrasonic electromagnetic stirring compound field structure

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Effects of Ultrasonic Vibration and Electromagnetic Stirring on the Dispersion of TiB_2 Particles for AZ31 Magnesium Alloy

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Journal of Iron and Steel Research International 2012年第S1期19卷 359-362页

作者： FANG Can-feng WANG Lao-hu MENG Ling-gang HAO Hai ZHANG Ai-min ZHANG Xing-guo School of Materials Science and Engineering.Dalian University of Technology

In-situ TiB_2/AZ31 composites were prepared by utilizing the SHS reaction of Al-Ti-B system in the molten magnesium,and the effects of external physical fields on the dispersion of TiB_2 particles were *** results show that high-energy ultrasonic vibration could effectively break up the particle clusters and make the TiB2 particles uniformly distributed in the melt of TiB_2/AZ31 *** compound field(high-energy ultrasonic field coupling with electromagnetic field)could not only distribute the TiB_2 particles into the matrix uniformly,but also make the grains of α-Mg free and uniform further than the ultrasonic field *** average grain size of as-cast TiB_2/AZ31 composites was reduced from 173μm to 94μm.

关键词： TiB_2/AZ31 magnesium matrix composites ultrasonic vibration electromagnetic field compound field

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Effects of Ultrasonic Vibration and Electromagnetic Stirring on the Dispersion of TiB2 Particles for AZ31Magnesium Alloy

Effects of Ultrasonic Vibration and Electromagnetic Stirring...

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第七届冶金与材料电磁过程国际会议（EPM2012）

作者： FANG Can-feng WANG Lao-hu MENG Ling-gang HAO Hai ZHANG Ai-min ZHANG Xing-guo School of Materials Science and Engineering.Dalian University of Technology

In-situ TiB/AZ31 composites were prepared by utilizing the SHS reaction of Al-Ti-B system in the molten magnesium,and the effects of external physical fields on the dispersion of TiB particles were *** results show that high-energy ultrasonic vibration could effectively break up the particle clusters and make the TiB particles uniformly distributed in the melt of TiB/AZ31 *** compound field(high-energy ultrasonic field coupling with electromagnetic field) could not only distribute the TiB particles into the matrix uniformly,but also make the grains of α-Mg fine and uniform further than the ultrasonic field *** average grain size of as-cast TiB/AZ31 composites was reduced from 173 μm to 94 μm.

关键词： TiB2/AZ31 magnesium matrix composites ultrasonic vibration electromagnetic field compound field

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