徐晓岑,李家智,丁桦,高维林

• 1:东北大学材料科学与工程学院
• 2:辽宁省轻量化用关键金属结构材料重点实验室
• 3:郑州大学材料科学与工程学院

摘要(Abstract)：

采用光学显微镜、透射电镜、电子万能试验机、数字电导率仪和维氏硬度计等研究了不同形变热处理工艺对Cu-0.31Cr-0.19Zr-0.03Si(mass%)合金组织演变、力学性能、电学性能及抗软化特性的影响。结果表明:经960℃×1 h固溶处理+450℃×2 h预时效处理+80%冷轧+450℃×1 h时效处理后(组合形变热处理),合金的抗拉强度达到615 MPa,屈服强度达到598 MPa,硬度达到206 HV,电导率达到70.5%IACS。合金经预时效处理后在基体中析出大量弥散分布的细小析出相,在后续的冷轧中,析出相与位错发生强烈交互作用,在基体中引入高密度的位错,从而提高合金的力学性能。此外,对经组合形变热处理取得峰值强度的试样进行了抗软化性能的研究,结果表明该合金的软化温度高达580℃。经微观组织分析发现,在该温度下合金中析出相发生了粗化,但再结晶程度较低,此时引起合金软化的主要机制为析出相长大机制。

关键词(KeyWords)： Cu-Cr-Zr-Si合金;抗拉强度;显微硬度;电导率;抗软化性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 徐晓岑,李家智,丁桦,高维林

DOI: 10.13289/j.issn.1009-6264.2021-0058

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