3003铝合金多道次热轧工艺的实验模拟

来源期刊：中南大学学报(自然科学版)1999年第4期

论文作者：张辉 钟华萍 彭大暑

文章页码：80 - 83

关键词：均匀化;多道次热轧;热模拟;亚结构;再结晶;3003铝合金

Key words：homogenization; multipass hot rolling; thermal simulation; subgrain; recrystallization; 3003 aluminum alloy

摘    要：参照美国某铝业公司热轧工艺规程，在Gleeble-1500热模拟机上，对3003铝合金多道次热轧过程进行了实验模拟，通过对变形后试样的金相组织与TEM观察及显微硬度测量，发现亚晶的形成与再结晶不 仅取决于轧制温度，而且还与铸锭均匀化处理工艺、变形不均匀带、累积变形量及道次间停留时间有关．均匀化A处理(单级均匀化：500℃)与B处理(两级均匀化：600→500℃)相比，前者由于产生细小弥散的第二相粒子，致使亚晶的形成与再结晶在整个热轧过程中都相应地减弱．

Abstract: Multipass hot rolling process of 3003 aluminum alloy was simulated on Gleeble-1500 according to a typical procedure. The deformed specimens were analysed by the observation of optical micrography and TEM, and the measurement of micro hardness. The results show that the formation of subgrains and recrystallization not only depend on the rolling temperature, but also on the homogenization of cast, the inhomogeneous deformation band, the accumlated strain and pause times between passes. The two step B homogenization at 600 →500 ℃ brings about larger particles than A homogenization at 500 ℃, thus the formation of subgrains and recrystallization occur easily during multipass hot-rolling of 3003 aluminum alloy.