Fe含量对粉末冶金Cu-Fe合金显微组织与性能的影响  

Influence of Fe content on microstructure and performance of powder metallurgy Cu−Fe alloys

作　　者：张平[1] 袁晓波 曾梓名 滕剑威 周芸合 杨标标 李云平[1] Ping ZHANG;Xiao-bo YUAN;Zi-ming ZENG;Jian-wei TENG;Yun-he ZHOU;Biao-biao YANG;Yun-ping LI(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;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)

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083 [2]Institute for Materials Research,Tohoku University,Sendai 980-8577,Japan [3]IMDEA Materials Institute,C/Eric Kandel 2,Getafe,Madrid 28906,Spain [4]Department of Materials Science,Polytechnic University of Madrid/Universidad Politécnica de Madrid,E.T.S.de Ingenieros de Caminos,Madrid 28040,Spain

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第5期1571-1587,共17页中国有色金属学报（英文版）

基　　金：Natural Science Foundation of China(No.51871244);Hunan Provincial Innovation Foundation for Postgraduate,China(No.CX20200172);Fundamental Research Funds for the Central Universities of Central South University,China(No.1053320190103)。

摘　　要：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0.29μm增加到1.20μm;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。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 1.20μm.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.%.

关 键 词：铜铁合金 粉末冶金 快速凝固 力学性能 强度计算 

分 类 号：TG146.11[一般工业技术—材料科学与工程]