4004 铝合金表面恒温氧化动力学研究
来源期刊：中南大学学报(自然科学版)1998年第5期
论文作者：彭志辉 王皋 甘卫平 佘旭凡
文章页码：74 - 77
关键词：4004 铝合金;表面氧化;氧化动力学
Key words：Al Mg alloy; surface oxidization; dynamics of oxidization
摘 要：模拟4004／3003／4004热轧复合工艺，对4004合金在350～525℃分别加热保温所制备的试样表面氧化情况、氧化层厚度进行了宏观分析．用电子能谱仪(XPS)对4004合金475℃下各保温时间的试样表面氧化层进行Ar＋逐层溅射剥离，对剥离面进行XPS分析．对XPS图谱进行了计算，结果表明：4004合金在475℃×3H试样表面已呈深灰色，氧化已较严重；在475℃恒温下，4004合金保温1～2h表面氧化层增厚遵循对数曲线变化；在2～6h内，表面氧化层按一定比例增长，超过6H后，表面氧化层增厚有所减缓．适当降低热轧复合时的加热温度，控制4004铝合金表面氧化层的厚度，能提高复合成功率.
Abstract: This paper macrographically analyzed the surface oxidization and the thichness of oxidized layer of 4004 alloy which successively undergo different temperature and different holding time during 350～525 ℃ according to the hot-rolling bolding processes of 4004/3003/4004. Layer by layer, Ar+ sputter etching and X-ray photoelectronic spectrum (XPS) instrument analysis of the exposed surface of 4004 alloy which is heated at 475 ℃ and undergoes different holding time are carried out. According to the calculation of XPS, we obtained the law of dynamics of surface oxidization for 4004 alloy at a constant temperature, eg, 475 ℃, which has effec on the processes of hot-rolling bonding. The results are as follows:at 475 ℃×3 h, the surface of 4004 alloy sample appears dark gray, indicating severe oxidation; holding time at 475 ℃. The surface oxidation layer thichness of 4004 alloy varies according to logrithm curve in the first two hours and increase proportionally in the next four hours, and after 6 hours, the oxidation layer thichness decreases partly. Properly decreasing the heating temperature of the rolling bonding and controlling the thickness of oxidation layer can improve the bonding efficiency.
