Al-TiO2-C晶粒细化剂对工业纯铝细化效果的影响

以TiO2粉、C粉、Al粉为原料,利用放热弥散法制备Al-TiO2-C晶粒细化剂,采用XRD,SEM,EDS等研究不同C与TiO2比例的细化剂的显微组织,并对工业纯铝进行细化实验。结果表明：Al-TiO2-C晶粒细化剂析出相为Al3Ti,TiC和Al2O3。当C与TiO2摩尔比为1∶25~1∶20时,Al-TiO2-C细化剂组织中Al2O3颗粒数量适中且分布相对弥散。当C与TiO2摩尔比为1∶20,该细化剂添加量为0.2%（质量分数）时,可将工业纯铝细化到约142μm,且保温1h未出现细化衰退。...

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Bibliographic Details
Published in材料工程 Vol. 45; no. 10; pp. 65 - 70
Main Author 韩小伟 张瑞英 王鹏
Format Journal Article
LanguageChinese
Published 内蒙古工业大学 材料科学与工程学院,呼和浩特,010051 2017
Subjects
Al-TiO2-C细化剂
放热弥散法
晶粒细化
grain refinement
晶粒细化
exothermic dispersion method
Al-TiO2-C refiner
放热弥散法
Al-TiO2-C细化剂
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ISSN1001-4381
1001-4381
DOI10.11868/j.issn.1001-4381.2015.000521

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Summary:以TiO2粉、C粉、Al粉为原料,利用放热弥散法制备Al-TiO2-C晶粒细化剂,采用XRD,SEM,EDS等研究不同C与TiO2比例的细化剂的显微组织,并对工业纯铝进行细化实验。结果表明：Al-TiO2-C晶粒细化剂析出相为Al3Ti,TiC和Al2O3。当C与TiO2摩尔比为1∶25~1∶20时,Al-TiO2-C细化剂组织中Al2O3颗粒数量适中且分布相对弥散。当C与TiO2摩尔比为1∶20,该细化剂添加量为0.2%（质量分数）时,可将工业纯铝细化到约142μm,且保温1h未出现细化衰退。
Bibliography:The Al-TiO2-C grain refiners were synthesized by the in-situ exothermic dispersion method by using TiO2,C and Al powders as raw materials.The microstructure of Al-TiO2-C refiners with different C/TiO2 was investigated by SEM,XRD and EDS.Grain refining test was carried out on industrial pure aluminum.The results show that Al-TiO2-C refiners are composed of Al3 Ti,TiC and Al2 O3.When the mole ratio of C to TiO2 is between 1∶25 and 1∶20,the amount of Al2 O3 is moderate and its distribution is relatively dispersive.An excellent grain refining performance is obtained when adding 0.2%（mass fraction）Al-TiO2-C refiner with C/TiO2 is 1∶20,the average grain size is about 142μm and there is no refining recession when holding 1 h.
11-1800/TB
ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2015.000521