Fe含量对Cu-Fe合金凝固特性及组织性能的影响  

Effect of Fe Content on Solidification Characteristics and Organizational Properties of Cu-Fe Alloys

作　　者：王庆娟[1] 闫田荣 任新龙 许博凡 丰竟翔 WANG Qingjuan;YAN Tianrong;REN Xinlong;XU Bofan;FENG Jingxiang(College of Metallurgical Engineering,Xi'an University Architecture and Technology,Xi'an 710000,China)

机构地区：[1]西安建筑科技大学冶金工程学院,西安710000

出　　处：《有色金属(中英文)》2025年第2期198-208,共11页Nonferrous Metals

基　　金：国家重点研发计划项目(2021YFB3501003)。

摘　　要：通过JmatPro软件和差示扫描量热仪对不同Fe含量铸态Cu-Fe合金进行热力学计算与DSC实验,研究了Fe含量对Cu-Fe合金凝固过程、铸态组织演变的影响,并对Cu-Fe合金的显微硬度进行测定。结果表明,当Fe含量分别为5%、20%、40%和50%时,随着Fe含量的增加,Cu-Fe合金液固转变(δ-Fe+L→γ-Fe)温度升高,温度由1201.4℃增加到1440.0℃,凝固过程中液固转变产生的焓值减小,包晶反应与共析反应产生的焓值增大。Fe含量的增加使合金铸态组织由细小的胞状晶转变为发达的等轴晶,分布更加均匀,初生Fe相尺寸增加。当Fe含量从5%增加到50%,铸态合金的显微硬度从87.34 HV增加至146.09 HV。Thermodynamic calculations and DSC experiments on cast Cu-Fe alloys with different Fe contents were carried out by JmatPro software and differential scanning calorimetry.The study investigated the effects of Fe content on the solidification process and the evolution of the as-cast microstructure of Cu-Fe alloys,and to determine the microhardness of Cu-Fe alloys.The results show that when the Fe content is 5%,20%,40%and 50%,respectively,with the increase of Fe content,the temperature of liquid-solid transition(δ-Fe+L→γ-Fe)of Cu-Fe alloy increases from 1201.4°C to 1440.0°C,the enthalpy generated by liquid-solid transition during solidification decreases,and the enthalpy generated by encapsulation reaction and eutectic reaction increases.As the Fe content increases,the as-cast organization of the alloy is transformed from fine cytosolic crystals to developed equiaxed grain with a more uniform distribution,and the size of the primary Fe phase is increased.The microhardness of the as-cast alloy increases from 87.34 HV to 146.09 HV as the Fe content increases from 5%to 50%.

关 键 词：CU-FE合金 凝固特性 DSC法 显微硬度 二元相图 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TG156.9[金属学及工艺—金属材料]