微量La对6061合金显微组织及时效硬化行为的影响
Effects of La on Microstructure and Age-hardening Behaviour of 6061 Alloy
杨义乐
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作者单位：中国工程物理研究院 流体物理研究所, 四川 绵阳 621900
中文关键字：6061铝合金； 稀土； 时效硬化； 显微组织
英文关键字：6061 aluminum alloy; rare earth; age-hardening; microstructure
中文摘要：采用洛氏硬度计(HRF)对稀土6061合金及其基体合金材料的时效硬化动力学曲线进行了研究。采用差示扫描量热仪(DSC)研究稀土6061合金及其基体合金材料的时效析出序列，采用金相显微镜观察了稀土6061合金及其基体合金材料的显微组织。结果表明：稀土元素La显著改变6061合金显微组织，明显加速6061铝合金的时效硬化过程，且对6061铝合金具有明显的细化及强化作用。
英文摘要：The age-hardening behavior of 6061-La and 6061 alloy was studied by Rockwell Hardness(HRF). The precipitation procedure of 6061-La and 6061 alloy was studied by differential scanning calorimetry (DSC). The microstructure of 6061-La and 6061 alloy was observed by metallurgical microscope. The results show that rare earth La can apparently change the microstructure and accelerate the age-hardening progress of 6061 alloy, and refine and strengthen the alloy apparently.