2A12铝合金退火塑性低原因分析  

Cause analysis on low plasticity of annealed 2A12 aluminum alloy

作　　者：李亚红[1] 戚小薇 王锡鹏 何芳[1] Li Yahong;Qi Xiaowei;Wang Xipeng;He Fang(Xi’an Changfeng Research Institute of Mechanism and Electricity,Xi’an Shaanxi 710065,China)

机构地区：[1]西安长峰机电研究所,陕西西安710065

出　　处：《金属热处理》2022年第1期290-294,共5页Heat Treatment of Metals

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。In order to find the cause for low plasticity after annealing, the chemical composition, hardness, microstructure and fracture morphology of 2 A12 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.

关 键 词：退火塑性 取样方向 2A12铝合金 各向异性 

分 类 号：TG157[金属学及工艺—热处理]