锌铝合金阀片断裂失效分析  

Fracture Failure Analysis of Zinc-Aluminum Alloy Valve Piece

作　　者：高丽娜[1] 邓斌[2] 曹伟产 GAO Li＇na;DENG Bin;CAO Weichan(Xi＇an International University,Xian 710077,China;No.12 Research Institute of CSIC,Xingping 713102;Xi＇an XD Switchgear Electric Co.,Ltd.,Xi＇an 710077,China)

机构地区：[1]西安外事学院,陕西西安710077 [2]中国船舶重工集团公司第十二研究所,陕西兴平713102 [3]西安西电开关电气有限公司,陕西西安710077

出　　处：《热加工工艺》2018年第15期250-252,255,共4页Hot Working Technology

基　　金：西安市2017年度社会科学规划基金项目(17IN09)

摘　　要：采用X射线衍射仪、扫描电子显微镜及能谱仪等研究了合金元素对铝锌合金组织的影响。结果表明,锌铝合金中含有Si、Cu、Fe等元素与Al或者Zn易生成金属间化合物。锌铝合金呈现枝状晶形貌,合金中存在大量不规则熔池组织。合金中的杂质元素及氧化物均存在于熔池组织中,这些熔池组织在高倍观察下可见为分散性的微孔。在受到外力时,这些缩孔将成为应力集中点,大量微小缩孔是合金在外力下发生断裂的主要原因。The effect of alloy elements on the microstructure of Al-Zn alloy was investigated by using X-ray diffractometer, scanning electron microscope（SEM） and energy spectrometer. The results show that the elements such as Si,Cu, Fe are easy to produce intermetallic compounds with Al or Zn in Al-Zn alloy. Al-Zn alloy exhibits dendritic morphology and a large number of irregular molten pool structure exists in the alloy. The impurity elements and oxides in the alloy are existed in the molten pool, which are visible dispersed micro-perforations under high times observation. When the alloy is subjected to external force, these shrinkage becomes the stress concentration point, and a large number of tiny shrinkage is the main reason for the fracture of the alloy under external force.

关 键 词：锌铝合金 断裂 失效 阀片 

分 类 号：TG292[金属学及工艺—铸造]