摘要
对冷轧复合4343铝/4A60铝/08Al钢三层复合带材进行不同温度和时间的退火,借助金相显微镜、扫描电镜和EDAX能谱仪以及X射线衍射仪对复合界面结合区进行组织观察、元素成分线扫描分析和EDS能谱分析及XRD物相分析,研究复合界面金属间化合物的生长行为。结果表明:当退火温度较高时,4343中含量较高的Si向4A60中进行了较大程度的扩散;铝-钢复合界面在600℃保持1 h退火时有金属间化合物产生;随着退火温度的升高和退火时间的延长,复合界面金属间化合物由一层增加至三层,化合物主要由Fe4Al13和Fe2Al5组成;铝-钢复合界面金属间化合物的生长由扩散控制,其增厚符合抛物线规律,界面金属间化合物的生长激活能为14.4 k J/mol。
The 4343（ Al）-4A60（ Al）-08Al（ steel） tri-layer clad strips bonded by cold rolling were annealed at different temperature and time,the microstructure,element line scanning analysis and identification of the intermetallic compounds（ IMC） at the interface were studied with metallograph microscopy,scanning electron microscope（ SEM）,energy dispersive spectrometer（ EDAX） and X-ray diffraction（ XRD）,respectively. And the IMC＇s growth behavior at the Al-steel interface were investigated. The results show that higher content element Si in 4343 largely diffuses into 4A60 while the annealing at the higher temperature. The intermetallic compounds appear when annealed at 600 ℃ for 1 h. As the temperature and time increase,the layer number of IMC observed by SEM increases from 1 to 3,and it＇s composed of Fe4Al13 and Fe2Al5. The growth of IMC at Al-steel interface is controlled by diffusion,and its thickness increase complies with the parabolic law,the growth activation energy of the intermetallic compound is 14. 4 kJ / mol.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第10期22-27,共6页
Heat Treatment of Metals
基金
国家高技术研究发展计划(863计划)(2013AA031301)
国家国际科技合作专项项目(2013DFB50170)
江苏重点实验室资助项目(BM2014006)
关键词
冷轧
铝-铝-钢三层复合带材
金属间化合物
生长激活能
cold rolling
Al-Al-steel tri-layer clad strips
intermetallic compound（IMC）
growth activation energy
