Transactions of Materials and Heat Treatment

Title：Influence of annealing temperature on microstructure and properties for drawn Cu-14Fe alloy

Authors： Guo Wei Shen Yun Jiang Jiang Chen Wei Lu Deping Liu Keming Xu Mengli

Unit： Jiangxi Academy of Sciences Nanchang Institute of Technology Jiangxi Open University

KeyWords： Cu-14Fe alloy drawing microstructure mechanical properties conductivity

ClassificationCode：TG166；TG359

year,vol(issue):pagenumber：2020,45(12):191-194

Abstract：

In order to study the microstructure of Cu-Fe alloy prepared by drawing and explore the influence law of annealing temperature on the properties of alloy, for Cu-14Fe alloy prepared by means of vacuum melting, the drawing process was conducted with different strains，and the microstructure, mechanical properties and conductivity of the alloy were studied by optical microscope, electronic universal testing machine and digital microhmmeter after annealing treatment at different temperatures. The results show that the drawing deformation makes the distribution of the second phase in the alloy to change from random dendritic morphology in as-cast state to the fiber morphology along the drawing direction. The bigger the processing strain is, the longer the second phase with fiber morphology is, and the more uniform the distribution in Cu matrix is. Furthermore, the tensile strength of the as-drawn alloy is 618 MPa, and the elongation is 21%. When the alloy is annealed at 200 ℃, the tensile strength and elongation change insignificantly. However, as the annealing temperature increases to 550 ℃, the tensile strength gradually decreases to 416 MPa, and the elongation increases to 199%. With the increasing of annealing temperature, the resistivity of alloy gradually decreases.

Funds：

江西省重点研发计划(20202BBEL53026, 20202ZDH02063)；国家自然科学基金资助项目(51861025)；江西省自然科学基金资助项目(20192BAB206001)；江西省科学院重点科研项目(2020-YZD-2, 2017-YZD2-20)

郭炜（1981-），男，博士，副研究员 E-mail：guowei66@sohucom

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