4004铝合金板材表面小裂纹产生原因分析  

Cause Analysis on Little Crack of 4004 Aluminum Alloy Plate Surface

作　　者：雷金琴[1] 孙黎明[1] 吕丹[1] 韩颖[1] 殷云霞[1] 

机构地区：[1]东北轻合金有限责任公司,哈尔滨150060

出　　处：《铝加工》2016年第2期57-60,共4页Aluminium Fabrication

摘　　要：通过显微组织观察、扫描电镜观察及能谱分析对4004铝合金板材出现表面小裂纹的本质及形成原因进行了研究分析。结果表明,由于铸锭内部组织中存在氧化夹杂物,在板材轧制过程中形成夹杂分层,导致加工变形时因应力集中而开裂。To find out the reason of cracks appeared on the 4004 aluminum alloy plate, the plate with cracks has been studied by analyzing the component and microstructure of the cracks with scanning electron microscope and spectrometer analyses. The results show that the existence of oxide inclusions in the alloy results in delamination during rolling, which further leads to crack due to stress concentration.

关 键 词：4004铝合金 板材 裂纹 夹杂分层 

分 类 号：TG146.21[一般工业技术—材料科学与工程]