Parameters Optimization for Degassing Treatment of Magnesium Alloy Melt
XU Si-xiang1, WU Shu-sen2, MAO You-wu2, XIAO Yi2
1. School of Mechanical Engineering, Anhui University of Technology, Ma'anshan 243002, Anhui, China; 2. State Key Lab of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract:Purging effects of Ar fluxing were investigated with an instrument for measuring hydrogen content in magnesium alloy melt,and the influence of three factors of Ar flow rate,degassing time and temperature of magnesium melt on purging effect were studied.The optimal parameters were obtained by experiment under conduction of orthogonal test design that Ar flow rate was 1-1.5L/min,degassing time 20-25min and temperature of magnesium melt 725-750℃.In addition,a series of parametric studies were conducted to demonstrate the influence of several key parameters on the effectiveness of purifying magnesium alloy melt.
[1] YUAN Guang-yin,LIU Man-ping,DING Wen-jiang,et al.Microstructure and mechanical properties of Mg-Zn-Si based alloys[J].Materials Science &Engineering A,2003,357(1-2):314-320. [2] DU Wen-wen,SUN Yang-shan,MIN Xue-gang,et al.Microstructure and mechanical properties of Mg Al based alloy with calcium and rare earth additions[J].Materials Science &Engineering A,2003,356(1-2):1-7. [3] YUAN Guang-yin,SUN Yang-shan,DING Wen-jiang.Effects of bismuth and antimony additions on the microstructure and mechanical properties of AZ91 magnesium alloy[J].Materials Science &Engineering A,2001,308(1-2):38-44. [4] HAN J W,KIM D J,YOU B D,et al.Effect of gas bubbling and impeller agitation on degassing kinetics during magnesium alloy(AZ91D)melt recycling-water model approach[J].Materials Science Forum,2003,439:192-199. [5] WATANABE T,HUANG Y C,KOMATSU R,et al.Study on degassing treatment for molten magnesium[J].Light Metals,1976,26(6):266-272. [6] BAKKE P,LAURITZEN J L,ENGH T A,et al.Hydrogen in magnesium absorption,removal and measurement[J].Light Metals,1991,1015-1023. [7] MIKUCKI B A,SHEAROUSE Ⅲ J D.The effects and removal of hydrogen gas in AZ91 alloy[J].IMA,1993,62-73. [8] 胡中潮,张二林,曾松岩.铸造镁合金旋转喷吹除气的试验研究[J].特种铸造及有色合金,2006,26(3):139-141. [9] XU Si-xiang,WU Shu-sen,MAO You-wu,et al.Establishment of a hydrogen measurement system for magnesium alloy melt[J].Trans Nonferrous Met Soc China,2006,S3:1677-1680. [10] 杨长贺,曹兴言,王甲运,等.多孔吹头通Ar精炼铝合金液的生产试验研究[J].大连工学院学报,1982,21(4):125-131. [11] 陆树逊,顾开道,郑来苏.有色铸造合金及其熔炼[M].北京:国防工业出版社,1983.