摘要
试验以4343铝合金和4A60铝合金为研究对象,在加热至450℃条件下进行一道次热轧复合,获得不同压下量条件下的4343/4A60铝合金热轧复合板,然后采用多道次冷轧轧薄至最终厚度为0.4 mm。通过分析热轧复合和后续冷轧薄过程中两组元层铝合金的厚比变化、显微硬度变化规律及复合界面元素的扩散状态,探讨了等厚铝钎焊层/铝过渡层热轧复合过程中的变形规律及界面结合行为。结果表明,在热轧复合和冷轧过程中,4343铝合金和4A60铝合金组元层厚比变化波动较小,与初始层厚比相同,两种金属变形规律基本一致;通过对热轧复合板厚度方向的显微硬度测量,得到在4A60铝合金层靠近界面附近显微硬度值有明显升高的现象,通过扫描电镜对复合界面进行能谱仪分析,发现热轧后复合界面4343铝合金侧有硅元素向4A60铝合金侧扩散现象,说明铝合金热轧复合的界面结合为牢固的冶金结合。
Hot roll-bonding with one pass was carried out on 4343 aluminum alloy and 4A60 aluminum alloy at 450℃. The hot rolled 4343/4A60 aluminum alloy cladding plate was obtained under different deformation conditions and eold rolled with multi passes to the final thickness 0.4 ram. The deformation law and interracial bonding behavior of aluminum brazing layer/transition layer with the same thickness in the hot roll-bonding process were studied by analyzing the thickness ratio of two kinds of aluminum alloys during hot roll-bonding and subsequent cold rolling, the change rule of micro hardness and the diffusion state of composite interface. The experimental results show that in the hot roll-bonding and cold roiling process, there is a little change for 4343 aluminum alloy and 4A60 aluminum alloy thickness ratio, which is basically the same with the initial thickness ratio, and the deformation laws of two kinds of aluminum alloys are almost the same. The micro hardness was measured in the thickness direction of the cladding plate, and the result shows that the hardness of the 4A60 aluminum alloy layer is obviously increased near the interface. The analysis of the bonding interface was carried out by SEM, and it was found that the silicon elements diffused from the 4343 aluminum alloy layer to the 4A60 aluminum alloy layer, indicating a combination of solid metallurgical bonding at the roll-bonding interface of aluminum alloy.
出处
《轻合金加工技术》
CAS
北大核心
2016年第7期26-31,共6页
Light Alloy Fabrication Technology
基金
国际科技合作项目(项目编号:2013DFB50170)
国家863计划项目(项目编号:2013AA031301)
江苏省重点实验室的支持下得以完成
