金属热处理 ›› 2022, Vol. 47 ›› Issue (1): 290-294.DOI: 10.13251/j.issn.0254-6051.2022.01.049

• 测试与分析 • 上一篇    

2A12铝合金退火塑性低原因分析

李亚红, 戚小薇, 王锡鹏, 何芳   

  1. 西安长峰机电研究所, 陕西 西安 710065
  • 收稿日期:2021-08-14 修回日期:2021-10-21 出版日期:2022-01-25 发布日期:2022-02-18
  • 作者简介:李亚红(1982—),男,高级工程师,硕士,主要研究方向为金属材料热处理及失效分析,E-mail:15529694899@163.com

Cause analysis on low plasticity of annealed 2A12 aluminum alloy

Li Yahong, Qi Xiaowei, Wang Xipeng, He Fang   

  1. Xi'an Changfeng Research Institute of Mechanism and Electricity, Xi'an Shaanxi 710065, China
  • Received:2021-08-14 Revised:2021-10-21 Online:2022-01-25 Published:2022-02-18

摘要: 2A12铝合金拉伸试样退火后塑性低,为找到原因,采用光谱仪、硬度计、金相显微镜以及扫描电镜对拉伸试样化学成分、硬度、显微组织及断口形貌进行检测和分析。结果表明:热挤压棒料存在各向异性,纵向和横向塑性差异较大,取样时采用横向拉伸试样代替纵向拉伸试样,是造成退火后塑性低的根本原因。

关键词: 退火塑性, 取样方向, 2A12铝合金, 各向异性

Abstract: In order to find the cause for low plasticity after annealing, the chemical composition, hardness, microstructure and fracture morphology of 2A12 aluminum alloy tensile specimens were detected and analyzed by spectrometer, hardness tester, metallographic microscope and SEM. The results show that the hot extruded bar has anisotropy and a great difference in plasticity between longitudinal and transverse directions. The root cause of low plasticity after annealing is to use transverse tensile specimen instead of longitudinal one.

Key words: annealed plasticity, sampling direction, 2A12 aluminum alloy, anisotropy

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