首页|Fe含量对粉末冶金Cu-Fe合金显微组织与性能的影响

Fe含量对粉末冶金Cu-Fe合金显微组织与性能的影响

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研究Fe含量对粉末冶金Cu-Fe合金显微组织及性能的影响.采用电火花等离子烧结、冷轧以及时效处理工艺制备4种不同铁含量(5％、10％、20％和40％,质量分数)的Cu-Fe合金.研究结果表明,随着Fe含量从5％(质量分数)增加到40％(质量分数),Fe相由离散球形分布演变为连续交错分布,Fe相尺寸从0.29 μm增加到1.20 µm;时效态的Cu-Fe合金的屈服强度从411.5 MPa提高到788.8 MPa,电导率从62.5％(IACS)降低到42.0％(IACS).在以上结果的基础上,提出一种混合法则计算Cu基体、初级Fe相和次级Fe相对屈服强度的贡献,可较好地预测Fe含量高于10％(质量分数)合金的力学性能.
Influence of Fe content on microstructure and performance of powder metallurgy Cu-Fe alloys
The influence of various Fe contents(5,10,20,and 40 wt.％)on the microstructure and properties of powder metallurgy Cu-Fe alloy by spark plasma sintering,subjected to cold rolling and aging treatments,was explored.The results showed that,with increasing Fe content from 5 wt.％to 40 wt.％,the distribution of Fe phase evolved from the discrete spheroid to the continuous stagger,accompanying with its size increasing from 0.29 to 1.20 μm.Accordingly,the yield strength of the aged alloy increased from 411.5 to 788.8 MPa,whilst the electrical conductivity decreased from 62.5％(IACS)to 42.0％(IACS).Moreover,a rule of mixture was proposed to calculate the contribution of Cu matrix,primary Fe phase and secondary Fe phase to the yield strength of the alloy,which works well in the prediction of mechanical properties for Cu-Fe alloys with Fe content higher than10 wt.％.

Cu-Fe alloypowder metallurgyrapid solidificationmechanical propertiesstrength calculation

张平、袁晓波、曾梓名、滕剑威、周芸合、杨标标、李云平

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中南大学粉末冶金国家重点实验室,长沙 410083

Institute for Materials Research,Tohoku University,Sendai 980-8577,Japan

IMDEA Materials Institute,C/Eric Kandel 2,Getafe,Madrid 28906,Spain

Department of Materials Science,Polytechnic University of Madrid/Universidad Politécnica de Madrid,E.T.S.de Ingenieros de Caminos,Madrid 28040,Spain

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铜铁合金 粉末冶金 快速凝固 力学性能 强度计算

国家自然科学基金Hunan Provincial Innovation Foundation for Postgraduate,ChinaFundamental Research Funds for the Central Universities of Central South University,China

51871244CX202001721053320190103

2024

10.1016/S1003-6326(24)66492-7

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(5)