摘要
Cu−Fe alloys with different Fe contents were prepared by vacuum hot pressing.After hot rolling and aging treatment,the effects of Fe content on microstructure,mechanical properties and electrical conductivity of Cu−Fe alloys were studied.The results show that,when w(Fe)<60%,the dynamic recrystallization extent of both Cu phase and Fe phase increases.When w(Fe)≥60%,Cu phase is uniformly distributed into the Fe phase and the deformation of alloy is more uniform.With the increase of the Fe content,the tensile strength of Cu−5wt.%Fe alloy increases from 305 MPa to 736 MPa of Cu−70wt.%Fe alloy,the elongation decreases from 23%to 17%and the electrical conductivity decreases from 31%IACS to 19%IACS.These results provide a guidance for the composition and processing design of Cu−Fe alloys.
采用真空热压法制备不同Fe含量的Cu−Fe合金坯料。研究Fe含量对热轧和时效处理Cu−Fe合金组织、力学性能和导电率的影响规律和机理。结果表明,当Fe含量<60%(质量分数)时,Cu相和Fe相动态再结晶程度增大;当Fe含量≥60%时,Cu相颗粒均匀分布在Fe相中,合金变形较均匀。随着Fe含量的增加,抗拉强度从Cu−5%Fe合金的305 MPa增加至Cu−70%Fe合金的736 MPa,其断后伸长率则从23%下降至17%,导电率从31%IACS下降至19%IACS。该结果对Cu−Fe合金的成分和加工工艺设计具有指导意义。
基金
financial supports from the National Natural Science Foundation of China (No.51974375)
Key Project of "Technology Innovation 2025",Ningbo,China(No.2018B10030)
Technology Research Program of Shenzhen,China (No.JSGG20170824162647398)
Project of State Key Laboratory of Powder Metallurgy,Central South University,China
Young People Fund of Jiangxi province,China (No.2018BAB216005.
