摘要
为了了解铝合金挤压时的表面行为及粗晶环的来源和机制,进行了小规模的反挤压试验。为了知道工件条件和化学成分对其影响,对制件做了金相和定向条像显微照片观察,发现降低再结晶抑制元素(如Cr)含量,增大挤压比和挤压速度都会增大粗晶环的深度。基于挤压时显微组织的演变,提出了在制件外表生成粗晶环的机制。
In order to understand aluminum alloys surface status,source of coarse grain after extrusion,a small batch of test is undertaken through the controlled parameters.In order to know the effects of processing and the chemical composition of products,we observed the microstructure using microscopy.It was observed that decreasing recrystallisation inhibited the amount of elements（such as Cr）,increasing extrusion ratio and speed increase the depth of peripheral coarse grain.Based on the evolution of extrusion microstructure,the mechanism of generate peripheral coarse grain on surface of products is presented.
出处
《上海有色金属》
CAS
2012年第1期16-19,共4页
Shanghai Nonferrous Metals
关键词
6系铝合金
粗晶环
再结晶
挤压比
挤压速度
6 series aluminum alloy
peripheral coarse grain
recrystallisation
extrusion ratio
extrusion speed
