时效工艺对ADC12铝合金析出相与力学性能的影响  

Effect of aging on precipitated phases and mechanical properties of ADC12 aluminum alloy

作　　者：杨哲[1] 陈水胜[2] Yang Zhe;Chen Shuisheng(Changjiang Institute of Technology,Wuhan Hubei 430212,China;School of Mechanical Engineering,Hubei University of Technology,Wuhan Hubei 430068,China)

机构地区：[1]长江工程职业技术学院,湖北武汉430212 [2]湖北工业大学机械工程学院,湖北武汉430068

出　　处：《金属热处理》2024年第9期216-220,共5页Heat Treatment of Metals

基　　金：国家自然科学基金委员会青年科学基金(42107214);湖北省自然科学基金(2020CFB122)。

摘　　要：对ADC12铝合金分别进行了预时效、单级时效和双级时效处理,并采用微观组织表征、能谱分析及硬度、拉伸、冲击试验,研究了不同人工时效处理对ADC12合金析出相与力学性能的影响。结果表明,不同时效处理导致合金中组织形貌和相组成的差异。预时效处理后,合金的显微组织中形成了弥散的析出相,使冲击吸收能量达到最高值18.60 J;单级时效处理后,合金中析出相呈圆形,抗拉强度达到最高值202.56 MPa;双级时效处理后,形成了细小的针状析出相,硬度达到最高值161.27 HBW。这表明双级时效处理在提高硬度方面效果最好,单级时效处理则在提高抗拉强度方面表现最佳,而预时效处理对提高冲击性能最为有效。Pre-aging,single-stage aging and double-stage aging treatments were carried out on ADC12 aluminum alloy,and the effects of different artificial aging treatments on the precipitated phases and mechanical properties of ADC12 alloy were investigated by means of microstructure characterization,EDS analysis and hardness,tensile and impact tests.The results show that different aging treatments lead to differences in the microstructure morphology and phase composition of the alloy.After pre-aging,dispersed precipitated phases are formed in the microstructure of the alloy,so that the impact absorbed energy reaches the highest value of 18.60 J.After single-stage aging,the precipitated phases in the alloy are rounded,and the tensile strength reaches the highest value of 202.56 MPa.After double-stage aging,fine needle-like precipitated phases are formed and the hardness reaches the highest value of 161.27 HBW.These results indicate that the double-stage aging has the best effect in improving hardness,the single-stage aging has the best performance in tensile strength,and the pre-aging is the most effective in improving impact properties.

关 键 词：ADC12合金 预时效 单级时效 双级时效 显微组织 力学性能 

分 类 号：TG441.8[金属学及工艺—焊接]