Grain refining technique of AM60B magnesium alloy by MgCO3

doi:10.1016/S1003-6326(11)61352-6

	Grain refining technique of AM60B magnesium alloy by MgCO3
	Chen Ti-jun; Wang Rui-quan; Huang Hai-jun; Ma Ying; Hao Yuan
刊名	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
	2012-07
卷号	22 期号:7 页码:1533-1539
关键词	AM60B magnesium alloy grain refinement MgCO3
ISSN号	1003-6326
DOI	10.1016/S1003-6326(11)61352-6
英文摘要	The effects of grain refining parameters on microstructure of AM60B magnesium alloy with MgCO3 were investigated and then a refining technique was developed. Simultaneously, the corresponding mechanisms were discussed. The results indicate that increasing addition temperature of MgCO3 or pouring temperature is beneficial for obtaining fine grains. There is an optimal addition amount of 1.2% at the addition temperature of 790 degrees C. Prolonging holding time at 790 degrees C will increase grain size. The grain refining technique that 1.2% MgCO3 is added at 790 degrees C followed by holding for 10 min and pouring can decrease the grain size from 348 mu m of the un-refined alloy to 69 mu m. The nucleation substrates are actually the Al4C3 particles formed from reactions between the MgCO3 and alloying elements in the melt. Besides the heterogeneous nucleation regime, growth restriction of the Al4C3 particles agglomerated at growing front is the other mechanism.
资助项目	National Basic Research Program of China[G2010CB635106] ; Program for New Century Excellent Talents in University of China[NCET-10-0023]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000307819300001
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34880]
专题	材料科学与工程学院
通讯作者	Chen Ti-jun
作者单位	Lanzhou Univ Technol, Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Chen Ti-jun,Wang Rui-quan,Huang Hai-jun,et al. Grain refining technique of AM60B magnesium alloy by MgCO3[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2012,22(7):1533-1539.
APA	Chen Ti-jun,Wang Rui-quan,Huang Hai-jun,Ma Ying,&Hao Yuan.(2012).Grain refining technique of AM60B magnesium alloy by MgCO3.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,22(7),1533-1539.
MLA	Chen Ti-jun,et al."Grain refining technique of AM60B magnesium alloy by MgCO3".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 22.7(2012):1533-1539.