7A04T6铝合金厚壁管材环状裂纹分析与预防措施  

Annular Crack Analysis and Precautionary Measures for 7A04T6 Aluminum Alloy Pipe with Thick Wall

作　　者：高新宇[1] GAO Xin-yu(Northeast Light Alloy Co.,Ltd.,Harbin 150060,China)

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》2017年第4期54-58,共5页Aluminium Fabrication

摘　　要：通过低倍组织、显微组织、扫描电镜观察及能谱分析等手段,分析了7A04铝合金管材裂纹的产生原因。组织分析表明,该裂纹为热裂纹,在主裂纹区域发现很多微裂纹,通过断口扫描分析,确定该裂纹为铸造过程中形成的裂纹。从形成机理上对7A04铝合金管材裂纹的成因进行了分析,并从铸造工艺等方面提出了解决措施。The cause of7A04aluminum alloy pipe crack has been analyzed using macrostructure examination,microstructure examination,SEM and EDS.The microstructure analysis results showed that pipe cracks were hot cracking.Many micro-cracks were found in the crack region,and the SEM analysis showed that the micro-cracks were formed during casting.The causes of crack of the7A04pipe were analyzed from formation mechanism,and the solutions are proposed from the casting process.

关 键 词：7A04铝合金 铸造裂纹 热裂纹 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG292[金属学及工艺—金属材料]