摘要
采用金相显微镜、扫描电子显微镜、拉伸试验机等研究了原位复合Cu-15Cr合金冷轧和退火后的显微组织和性能。结果表明:铸态Cu-15Cr合金的组织为铜基体和分布在其中的树枝晶状Cr相;冷轧后,Cr相从树枝晶状转变为定向排列的板条状,退火后Cr相的形态几乎不变;480℃×90 min退火的原位复合Cu-15Cr合金冷轧薄板的抗拉强度、断后伸长率及导电率分别为450.18 MPa、14.5%IACS和71.6%IACS。此外,采用抗拉强度混合模型和并联电阻模型对Cu-15Cr合金在冷变形过程中,以及退火后组织和性能的变化进行了描述分析。
Microstructure and properties of an in-situ composite Cu-15Cr alloy after cold rolling and annealing were investigated by using metallographic microscope, scanning electron microscopy and tensile tester and so on.The results indicated that(a) microstructure of the as-cast Cu-15Cr alloy consisted of copper matrix and Cr phases in the form of dendrite distributed over it;(b) the Cr phase changed from dendrite-like to directionally arranged lath-like ones after cold rolling and had little or no change in form after annealing;(c) tensile strength,elongation and conductivity of the in-situ composite Cu-15Cr alloy sheet annealed at 480 ℃ for 90 min were 450.18 MPa,14.5% IACS and 71.6% IACS, respectively.Furthermore, the changes in microstructure and properties of the Cu-15Cr alloy during cold deformation and after annealing were expressed in terms of mixed model of tensile strength and parallel resistance model.
作者
刘瑞蕊
朱律齐
周海涛
LIU Ruirui;ZHU Lyuqi;ZHOU Haitao(School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China;School of Material Science and Engineering,Central South University,Changsha Hunan 410083,China)
出处
《上海金属》
CAS
2022年第1期40-49,共10页
Shanghai Metals