摘要
本文利用超音速气体雾化法制备快速凝固高硅铝合金粉末 ,对合金粉末在不同温度加热处理后合金相组成、显微组织及显微硬度的变化特征进行系统研究。结果表明合金粉末在加热过程中 ,随着加热温度的升高 ,其组织中非平衡相逐渐转变为平衡相 ,同时有新的第二相沉淀析出 ,合金组织第二相在高温加热过程中有粗化趋势 ;合金显微硬度在低温加热时有下降趋势 ,随后升高温度不再下降 。
The rapidly solidified powders of a high silicon aluminum alloy were manufactured by ultrasonic gas atomization process Development characteristics of phase constitution, microstructure and microhardness of the alloy powders were studied after heat treatment at different temperatures The results showed that during the heat treatment, metastable phase of the alloy changed into stable phase gradually, a new intermetallic compound precipitated from the matrix and second phases of the alloy became coarse with raising temperatures At lower temperature, microhardness of the alloy powder decreased gradually with increasing temperature and afterwards its microhardness remained constant
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2002年第4期205-208,共4页
Powder Metallurgy Technology
基金
上海市博士后基金项目
关键词
超音速气体雾化
高硅铝合金
快速凝固
组织
性能
合金粉末
ultrasonic gas atomization process
high silicon aluminum alloy
rapid solidification
microstructure and property development
