不同锻压条件对建筑焊接用ADC12铝合金显微组织的影响  

Microstructure analysis of ADC12 aluminum alloy under different forging conditions

作　　者：李阳 汪燕玲 LI Yang;WANG Yanling(Xi'an Gaoke Curtain Wall Doors and Windows Co.,Ltd.,Xi'an 710119,Shaanxi,China)

机构地区：[1]西安高科幕墙门窗有限公司,陕西西安710119

出　　处：《模具技术》2024年第6期86-91,共6页Die and Mould Technology

基　　金：陕西省教育科学“十四五”规划2023年度课题立项项目(编号:SGH23Y2999)。

摘　　要：探讨了建筑焊接用近共晶Al-Si合金ADC12在变化的锻造条件下其微观结构的变化。在实验中,使用收敛型模具对ADC12合金在300,400,500℃三种不同加工温度下进行锻造,锻造比例分别为1.5和2.0。通过X射线衍射(XRD)技术分析了合金中第二相的变化,利用光学显微镜观察了锻造过程中形成的显微组织特性。XRD衍射数据揭示:除铝基体外,ADC12合金主要的相组成为Si,β-Al_(4.5)FeSi和Al_(2)Cu。在锻造过程中,细小的析出相颗粒沉淀促使ADC12合金的显微组织得到了显著的细化,同时,粗大的颗粒在锻造时也发生了破裂和碎裂。这项研究为深入了解和分析ADC12合金在实际锻造生产中的微观结构变化提供了理论支撑。In this study,the microstructural changes of ADC12,a near eutectic Al-Si alloy for architectural welding,were investigated in depth under varying forging conditions.In the experiments,the ADC12 alloy was forged using a converging die at three different processing temperatures,300,400,500℃,with forging ratios of 1.5 and 2.0,respectively.The changes in the precipitated phases in the alloy were analysed by X-ray diffraction(XRD)techniques,and the microstructural properties of the microstructures formed during the forging process were observed using an optical microscope.The experimental results were observed and analysed in detail in order to understand the interaction between the different treatment parameters more comprehensively.The XRD diffraction data revealed that a variety of complex intermetallic phases,such asβ-Al 4.5 FeSi and Al_(2) Cu,were generated in ADC12 alloy under the high temperature of casting.The precipitation of fine precipitation phases in the forging process contributed to the significant microstructure refinement of ADC12 alloy.microstructure to be significantly refined,while the coarse particles were ruptured and fragmented during forging.This study provides an important theoretical support for understanding and analysing the microstructural changes of ADC12 alloy in the actual production of forging.

关 键 词：建筑工业 ADC12铝合金 温度 锻压比 显微组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG316[金属学及工艺—金属材料]