大规格2A14铝合金铸锭氧化夹杂缺陷研究  

Oxidation Inclusion Defects in Large-size 2A14 Aluminium Alloy Ingots

作　　者：张娇娇 孙小涵 贺永东[1] 赵亿坤[3] ZHANG Jiaojiao;SUN Xiaohan;HE Yongdong;ZHAO Yikun(School of Materials Science and Engincering,Xinjiang University,Urumqi 830046;Shandong Energy Digi-tal Technology Co.,Ltd.,Ji'nan 250000;College of Physical Science and Technology,Xinjiang University,Urumqi 830046)

机构地区：[1]新疆大学材料科学与工程学院,乌鲁木齐830046 [2]山东能源数字科技有限公司,济南250000 [3]新疆大学物理科学与技术学院,乌鲁木齐830046

出　　处：《特种铸造及有色合金》2024年第7期965-970,共6页Special Casting & Nonferrous Alloys

基　　金：新疆科技厅重点研发任务专项资助项目(20231108B)。

摘　　要：通过超声波无损探伤、工业CT、金相显微镜、扫描电镜、能谱分析、拉伸试验等表征手段进行分析,研究了大规格2A14铝合金铸锭缺陷的形成。结果表明,2A14铝合金铸锭的主要缺陷是氧化夹杂,其微观组织呈现黑色不规则状,主要集中分布在晶界处和铸锭心部。氧化夹杂缺陷一般产生于熔铸阶段并伴随吸氢现象,是造成裂纹源的原因之一。通过对铝合金氧化物夹杂缺陷进行研究分析,并优化生产工艺参数路线,降低铝合金缺陷的产生几率。The large-size 2A14 aluminium alloy ingots were analyzed by ultrasonic nondestructive flaw detection,industrial CT,metallurgical microscope(OM),scanning electron microscope(SEM),energy spectrum analysis(EDS),and tensile test to investigate the formation mechanism of defects.The results indicate that defects in 2A14 aluminium alloy ingot are dominated by oxide inclusions,which presents black irregularity and are mainly concentrated in the grain boundary and center of ingot.Oxide inclusion defects are commonly generated in the melting and casting stage,accompanied by hydrogen absorption phenomenon,which is one of the causes of crack sources.The investiga⁃tion on oxide inclusion defects in aluminium alloys and optimization of production process parameters contribute to defect reduction in aluminium alloys.

关 键 词：2A14铝合金 氧化物夹杂 吸氢 缺陷分析 

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