摘要
采用SEM，EDX，TEM，DSC研究了Ti，B，RE（富铈混合稀土）细化的6063铝合金微观组织及性能．结果表明：Ti，B，RE细化的6063铝合金晶粒小于Al-5Ti-1B细化的合金；对于Ti，B，RE细化的6063铝合金，200℃×（80～300）min人工时效处理后，析出相主要为β″，合金硬度较高；对于Ti，B，RE细化的6063铝合金，由于RE与Mg，Si反应形成了Al-Si-Mg-RE化舍物，消耗了一定量的Si，Mg，使Mg与Si反应生成的强化相数量减少，从而使合金硬度低于同等Mg，Si含量的Al-5Ti-1B细化的合金．
The purpose of this study is to obtain a better understanding on the effect of Ti, B and cerium-rich mixtures of rare earth（RE） additions on the microstructures and properties of 6063 aluminium alloys with the aids of SEM, EDX, TEM, DSC, etc. The following conclusions have been obtained, grain sizes of 6063 aluminium alloys with Ti, B and RE additions are finer than that refined with A1--STi--IB master alloy. 6063 aluminium alloys with Ti, B and RE additions aged at 200 ~C for 80~300 min mostly are precipitate if＇ with higher hardness. RE reacts with Mg and Si, forming A1-Si-Mg-RE compounds and decreasing Si and Mg contents forming strengthe- ning phases, which results in lower hardness in 6063 aluminium alloys with Ti, B and RE addi- tions than that refined with A1-5Ti--1B master alloy.
出处
《建筑材料学报》
EI
CAS
CSCD
2008年第1期38-41,共4页
Journal of Building Materials
关键词
6063铝合金
微观组织
性能
6063 aluminium alloys
microstructure
property
