混合稀土对Cu-30Ni-20Fe-5Al微观组织及流动性的影响

王飞超; 彭伟平; 肖阳; 杨建红; 关绍康

doi:10.15980/j.tzzz.2012.05.027

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混合稀土对Cu-30Ni-20Fe-5Al微观组织及流动性的影响
Effect of MM（Mistchmetal） Element on Microstructure and Fluidity of Cu-30Ni-20Fe-5Al Alloy
2012年32卷第5期页码：485-488
纸质出版日期： 2012 ，
DOI： 10.15980/j.tzzz.2012.05.027

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[1]王飞超,彭伟平,肖阳,杨建红,关绍康.混合稀土对Cu-30Ni-20Fe-5Al微观组织及流动性的影响[J].特种铸造及有色合金,2012,32(05):485-488.

Wang Feichao1, Peng Weiping2, Xiao Yang2, et al. Effect of MM（Mistchmetal） Element on Microstructure and Fluidity of Cu-30Ni-20Fe-5Al Alloy[J]. Special Casting & Nonferrous Alloys, 2012,32(5):485-488.
[1]王飞超,彭伟平,肖阳,杨建红,关绍康.混合稀土对Cu-30Ni-20Fe-5Al微观组织及流动性的影响[J].特种铸造及有色合金,2012,32(05):485-488. DOI： 10.15980/j.tzzz.2012.05.027.

Wang Feichao1, Peng Weiping2, Xiao Yang2, et al. Effect of MM（Mistchmetal） Element on Microstructure and Fluidity of Cu-30Ni-20Fe-5Al Alloy[J]. Special Casting & Nonferrous Alloys, 2012,32(5):485-488. DOI： 10.15980/j.tzzz.2012.05.027.

摘要

采用真空熔炼制备不同稀土含量的Cu-30Ni-20Fe-5Al合金

研究了稀土含量对铸态Cu-30Ni-20Fe-5Al合金组织和流动性能的影响及内在机制。结果表明

铸态Cu-30Ni-20Fe-5Al合金由α-Cu和NiAl化合物两相组成

NiAl相以不规则环状分布

其不规则环状内外两侧存在较大的Fe元素偏析;加入混合稀土后

随混合稀土含量的增加

铸态合金中NiAl相变为球状、棒状独立存在

晶界处出现富稀土相的析出;当混合稀土含量达到0.78%时

不规则环状NiAl相球化效果最好;在流动性试验中

加入0.78%混合稀土元素与不加混合稀土元素比较

自制螺旋试样长度增加25%

合金的流动性能最好。

Abstract

Effects of MM on the microstructure and fluidity of Cu-30Ni-20Fe-5Al alloy

which was prepared by vacuum melting with various MM content

were investigated by SEM（scanning electron microscope）and XRD（X-ray diffraction）.The results show that as-cast Cu-30Ni-20Fe-5Al alloy is composed of α-Cu and NiAl phase

where NiAl phase is distributed in form of irregular ring-shape with Fe enrichment at the both inner and outer sides.The NiAl phase becomes spherical and rod-like structure with the addition of MM addition

and MM-enrichment phase is segregated at the grain boundary.NiAl phase exhibits the desirable spherical structure in the alloy with 0.78% MM addition.Compared to the alloy without MM element addition

the length of spiral samples is increased by 25%

showing the best fluidity.