5083圆棒金属间化合物缺陷分析及控制  

Defects Analysis and Control of Intermetallic Compound of 5083 Bars

作　　者：郑许[1,2] 谢尚昇[1,2] 彭斐[1,2] 周文标 

机构地区：[1]广西南南铝加工有限公司,广西南宁530031 [2]广西航空航天铝合金材料与加工研究院,广西南宁530031

出　　处：《热加工工艺》2016年第21期252-254,258,共4页Hot Working Technology

基　　金：广西自治区科学研究与技术开发计划项目(桂科合15104001-4);国家国际科技合作专项项目(2014DFA50210)

摘　　要：使用超声波检测技术对直径ф350mm的5083圆棒进行探伤并对缺陷进行定位。采用光学显微镜、扫描电镜、能谱仪对缺陷进行了分析。这些缺陷通常为粗大金属间化合物(Al_7Cr)。这些缺陷产生的原因主要与铸造过程的铸造温度、铸造液面不稳定相关。同时,本文提出了控制5083合金金属间化合物的一些措施,有效地降低了金属间夹杂的形成。Ultrasonic testing technique was used to inspect the 5083 extrusion bars with diameter of φ350 mm and locatethe defects. Optical microscopy, scanning electron microscopy and energy dispersive spectroscopy were used to analyze thecause of defects. The results show that the defects are usually large intermetallic compound （AIYCr）. The flaws are mainlyrelated to casting temperature and the casting surface instability during casting process. In this paper, some measures forcontrolling the intermetallic compound of 5083 alloy are put forward, which can effectively reduce the formation ofintermetallic inclusions.

关 键 词：5083铝合金 金属间夹渣 铸造 

分 类 号：TG292[金属学及工艺—铸造]