Mn对Al-Ti-B、 Al-Ti-C中间合金细化铝晶粒效果的影响.pdf
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Mn对Al—Ti—B、A1一Ti—C中问合金
细化铝晶粒效果的影响
李建国1,孙雪迎1,荼国吉1,陈学敏2
(1.清华大学材料科学与工程系教育部先进材料实验室,北京100084;
2.新星化工冶金材料(深圳)有限公司,广东深圳518106)
程度的破坏作用。微量Mn元素不会影响铝熔体中形核基底的活性,Mn元素加人铝熔体后的生长限制因子很小,不
能有效阻止小尺寸晶粒的长大和相互融合,添加Mn元素所导致的熔体过热对晶粒细化的破坏作用占主导地位,最
终导致中间合金的晶粒细化效果被削弱。
关键词:铝;中间合金;晶粒细化;锰,熔体过热
文献标识码:A
中图分类号:TGl46.21;TG292 文章编号:1007—7235(2012)03—0025—06
ofMnon of
Influence refinement AI·-Ti--B
grain efficiency
andAl—Ti-Cmaster
alloys
LI Xue—min2
Jian—gu01,SUNXue—yin91,CHAGuo—jil,CHEN
ofAdvancedMaterialsof of of Science
Materials
(1.KayLaboratory MimstryEducation,Department
and
Engineering,TsinghIlia.’University,Beijing100084,China;
ChemicalMetallurgicalMaterials(Shenzhen)Co.Ltd.,Shenzhen518106,China)
2.Sunxing
influenceofMnon refinement ofA1一Ti—BandA1一Ti—Cmas—
Abstract:The grain efficiency
ter usedinAlmelt the of
was mechanismoftheinfluenceMnwas
alloys investigated.And
resultshowedthatMncanweakentherefinement ofthetwomaster
analyzed.The efficiency
traceofMnwon’treducethe ofnucleationsubstrates.Therestric—
alloys.A activity growth
tionfactorinducedMnwastoosmalltorestrictthe andcombinationofgrains.The
by growth
melt causedMn
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