轧制复合对泡沫铝夹心板组织与性能的影响  

Effect of Rolling-Bonding Process on Structure and Mechanical Properties of Aluminum Foam Sandwich

作　　者：祖国胤[1] 郝亮[1] 张敏[1] 姚广春[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2007年第12期1725-1728,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50704012);辽宁省企业博士后研究项目(BSH-2005921035)

摘　　要：研究了轧制复合-粉末冶金发泡法制备泡沫铝夹心板的生产工艺,分析了板/芯结合工艺对芯层粉末致密度的影响,探讨了粉末致密度与发泡效果间的关系,初步得到了复合板的发泡机制.研究结果表明:轧制过程使芯层粉末获得了极高的致密度.发泡时,轧制复合板内发泡剂TiH2释放出的H2的流失量很少,发泡驱动力充足,所得到的夹心板很少出现无泡层及大尺寸连通孔等缺陷.芯层粉末内发泡剂的质量分数为1%时,轧制复合板发泡后即可获得理想的泡沫结构,有效降低了产品的生产成本.夹心板具有良好的三点抗弯强度等力学性能.The process technology combining rolling-bonding technique with powder metallurgic foaming to prepare AFS （aluminum foam sandwich） was studied, Discusses the effect of the process technology applied to both face plate and core powder on the powder compactness, and it in relation to foaming effect. The foaming mechanism of AFS through the rolling-bonding process was found preliminarily, The results showed that the rolling process can provide very high compactness of core powder which decreases greatly the loss of H2 released from the foaming agent TiH2 in AFS during foaming. Thus, the foaming power is so sufficient that the defects such as bubble-free layer and large-size connected holes hardly occur, When the content of TiH2 is lwt% the ideal foaming structure can be got after rolling-bonding and foaming processes to decrease production cost. AFS thus made has high flexural strength and other better mechanical properties as verified by three-point tests.

关 键 词：泡沫铝夹心板 轧制复合 粉末冶金发泡 致密度 发泡机制 

分 类 号：TG146.2[一般工业技术—材料科学与工程]