一、序言 7000系高强铝合金,为了提高韧性、抗应力腐蚀裂纹性等各种性能,必须控制再结晶,添加Cr或Zr。但是,这两种添加元素,对再结晶行为的影响根本是不同的,在某种意义上,搞清其差别是十分重要的。在已报道过的文献中,对冷轧板的这一点进行了研究,得出如下的结果:含Zr合金的亚晶粒长大比含Cr合金的快,而再结晶晶粒沿轧制方向难以长大等。但是产生这种差别的原因,还不十分清楚。因此本研究采用热轧板,更详细地研究了两种添加元素的不同影响。之所以采用热轧板,是因为考虑到固溶处理时也许难以产生再结晶核,能明显地抓住添加两种元素合金再结晶行为的差别。 First, the preamble 7000 series high-strength aluminum alloy, in order to improve the toughness, stress corrosion cracking resistance and other properties, we must control recrystallization, add Cr or Zr. However, the influence of these two additive elements on the recrystallization behavior is fundamentally different. In a sense, it is very important to understand the difference. In the literature that has been reported, this is done with cold-rolled sheets and the result is that the sub-grains of Zr-containing alloys grow faster than those of Cr-containing alloys, while the recrystallized grains grow along the rolling direction Difficult to grow up. However, the reasons for this difference are not yet clear. Therefore, this study uses hot-rolled plates to examine in more detail the different effects of the two added elements. The reason why the hot-rolled sheet is used is that the difference in recrystallization behavior between the two elemental alloys can obviously be grasped by considering that it may be difficult to produce recrystallized nuclei upon solution treatment.