改性纳米SiC粉体铸造铝青铜强韧化及组织和性能研究  

Microstructure and Mechanical Properties of Reinforced Cast Aluminum Bronze by Modified Nano-SiC Powder

作　　者：陈美玲[1] 康磊[1] 杨军[1] 杨莉[1] 高宏[1] 

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《铸造》2008年第4期330-333,共4页Foundry

基　　金：辽宁省教育厅科技计划项目(05L038)

摘　　要：在生产条件下,用改性纳米SiC粉体对铸造铝青铜进行强韧化处理。采用光学显微镜、扫描电镜和力学性能测试等手段对处理前后的组织与性能进行了研究和讨论。结果表明:经改性纳米SiC粉体强韧化后,铝青铜的铸态组织和断口组织得到明显的细化,组织中的β相减少,K相明显析出,其强度和伸长率分别提高了14%和51%;断口分析结果表明:经强韧化处理后,铝青铜的断裂方式为韧性断裂。The reinforced aluminum bronze is prepared under actual production conditions by using surface-modified nano-SiC powder as reinforced additives.The microstructures and properties of the samples are investigated and discussed by means of optical microscope,SEM and mechanical testing.The results showed that the as-cast microstructure and fractograph of the samples are obviously refined,and the β phase is reduced;the strength and toughness are increased by 14% and 51% respectively,and the ductile fractures are obtained.

关 键 词：改性纳米SIC粉体 铸造铝青铜 晶粒细化 韧性断裂 

分 类 号：TG291[金属学及工艺—铸造]