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Heat transfer and grain refining mechanism during melt treatment by cooling sloping plate
查看参考文献14篇
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文摘
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Heat transfer of flow melt and grain refining mechanism during melt treatment by the cooling sloping plate were investigated.The results show that the cooling sloping plate can refine not only grains of alloys but also can obviously refine pure metal.Cooling ability of the plate is the key factor that induces grain refining,the plate material and the flow amount can affect cooling rate of the melt and thus affect refining effectiveness.The cooling rate of the melt on the cooling sloping plate is much faster than that of the conventional casting process,which can reach 1000 K/s and belongs to meta-rapid solidification scope.The thickness of the temperature boundary layer is much larger than that of the velocity boundary layer on the sloping plate,but the temperature gradient is small in the temperature boundary layer.Under strong cooling action by the cooling plate,most parts of the melt on the plate surface can form undercooling,which causes continuous eruptive nucleation,this is the main grain refining mechanism,and the heterogeneous nucleation on the plate surface is a helpful supplement for the nucleation. |
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来源
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Acta Metallurgica Sinica
,2012,25(4):320-328 【核心库】
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关键词
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Grain refining
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Nucleation
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Cooling rate
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Sloping plate
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Temperature boundary layer
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地址
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College of Materials and Metallurgy,Northeastern University, Shenyang, 110819
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语种
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英文 |
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ISSN
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1006-7191 |
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学科
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金属学与金属工艺 |
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基金
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国家973计划
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the Fok Ying Tong Education Foundation
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国家自然科学基金
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文献收藏号
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CSCD:4621353
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参考文献 共
14
共1页
|
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1.
Flemings M C.
Metall Trans A,22(1991):957
|
CSCD被引
1
次
|
|
|
|
|
2.
Brabazon D.
Mater Sci Eng A,326(2002):370
|
CSCD被引
1
次
|
|
|
|
|
3.
Jaworski M A.
Phys Rev Lett,104(2010):094503
|
CSCD被引
1
次
|
|
|
|
|
4.
Haghayeghi R.
J Alloy Compd,502(2010):382
|
CSCD被引
1
次
|
|
|
|
|
5.
Liu Z.
Trans Nonferrous Met Soc China,20(2010):805
|
CSCD被引
1
次
|
|
|
|
|
6.
Kapranos P.
Di?us Defect Data Part B,141/143(2008):115
|
CSCD被引
1
次
|
|
|
|
|
7.
Grimmig T.
Di?us Defect Data Part B,116/117(2006):484
|
CSCD被引
1
次
|
|
|
|
|
8.
Haga T.
J Mater Process Technol,153/154(2004):42
|
CSCD被引
1
次
|
|
|
|
|
9.
Jiang J F.
Trans Nonferrous Met Soc China,22(2012):555
|
CSCD被引
1
次
|
|
|
|
|
10.
Kirkwood D H.
Int Mater Rev,39(1994):173
|
CSCD被引
1
次
|
|
|
|
|
11.
Canyook R.
Trans Nonferrous Met Soc China,20(2010):1649
|
CSCD被引
1
次
|
|
|
|
|
12.
Mehrara H.
Di?us Defect Data Part B,141/143(2008):785
|
CSCD被引
1
次
|
|
|
|
|
13.
Yang S M.
Heat Transfer (in Chinese),2006:140
|
CSCD被引
1
次
|
|
|
|
|
14.
Ruhl R C.
Mater Sci Eng,1(1967):313
|
CSCD被引
1
次
|
|
|
|
|
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