7075铝合金预拉伸厚板探伤缺陷原因分析及对策  

Analysis and countermeasures of flaw detection of 7075 aluminum alloy pre-stretched thick plate

作　　者：冯旺 Feng Wang(Southwest Aluminum(Group)Co.,Ltd.,Chongqing 401326,China)

机构地区：[1]西南铝业(集团)有限责任公司,重庆401326

出　　处：《铝加工》2023年第6期12-16,共5页Aluminium Fabrication

摘　　要：对7075铝合金预拉伸厚板探伤缺陷样品的低倍、断口、显微组织等进行检测分析,并对相应的铸锭样品进行了追溯分析。结果表明,厚板密集型探伤缺陷由铸锭显微疏松引起,通过降低熔体氢含量,减小铸锭显微疏松的尺寸和体积分数,可以避免出现铸锭显微疏松遗传造成的探伤缺陷问题。The defect samples of 7075 aluminum alloy pre-stretched thick plate were analyzed by means of low magnification,fracture and microstructure methods,and the corresponding ingot samples were retrospectively analyzed.The results show that the intensive flaws detected of thick plate are caused by microporosity of ingot.By reducing the hydrogen content of melt and the size and volume fraction of microporosity of ingot,the defects caused by microporosity of ingot can be avoided.

关 键 词：7075合金 探伤缺陷 显微疏松 

分 类 号：TG146.21[一般工业技术—材料科学与工程]