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of semi-continuous casting of AZ80 magnesium alloy billet under ultrasonic vibration condition used in this research consisted of a metallurgic ultrasonic system, a billet mold, a casting control system... Effect of high-intensity ultrasonic field on process of semi-continuous casting for AZ80 magnesium alloy billets ZHANG Zhi-qiang(张志强), LE Qi-chi(乐启炽), CUI Jian-zhong(崔建忠) Key Laboratory......
plays an important role at higher vibration frequencies. Key words: magnesium alloy; electromagnetic vibration; microstructure formation; grain refinement; solidification  .... The microstructure formation in these two alloys was examined as a function of vibration frequency, f, and the grains refinement mechanism was investigated when considering the vibration characteristic in the semi......
than 100 ?m. When the casting speed is 45-50 mm/min, the best grain refinement is obtained. Key words: 7050 aluminum alloy; ultrasonic power; casting speed; semi-continuous casting; solidification... in the preparation of aluminum products. Direct chill is a prevailing semi-continuous casting method in the production of aluminum alloy ingots [1-6]. The difficulties in the casting process of high......
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; semi-continuous casting; refinement 1 Introduction Magnesium alloy has advantages of low density, high specific strength and damping capacity, and nice electromagnetic shielding, etc[1-2... and refine microstructure[12]. Nowadays, it is a main way to obtain high quality wrought magnesium alloy billets using the fast cooling way of continuous or semi-continuous casting. In this experiment......
are improved. Key words: low frequency electromagnetic field; ultrasonic field; Mg alloy; DC casting 1 Introduction Grain refinement is an effective way to improve the workability and strengthening... and Technology, 2009, 25(7): 931-934 [12] XU J, MEEK T T, HAN Q. Refinement of eutectic silicon phase of aluminum A356 alloy using high-intensity ultrasonic vibration [J]. Scripta Materialia, 2006, 54(5......
. Key words: electromagnetic stirring; semi-solid; continuous casting; Al-6Si-3Cu-Mg alloy 1 Introduction The direct chill casting process has been used almost exclusively to produce aluminum ingots... or rosette-like, and homogeneous in the billet. References [1] VIVES C, RICOU R. Experimental study of continuous electromagnetic casting of aluminum alloy [J]. Metall Trans B, 1985, 16(2): 377-384......
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vibration treatment. The refine mechanism under electromagnetic vibration was discussed. Key words:Electromagnetic vibration; Grain refinement; Directional solidification; Mechanical property; [全文内容正在添加...Effects of electromagnetic vibration on the structure and mechanical properties of AI-6%Si alloy during directional solidification Yunbo ZHONG1,Kang DENG1,Weili REN1,Zhongming REN1,Jianbo YU1......