减少铝合金带材表面“爆炸坑”的退火工艺  

Annealing process for reducing explosive dents on the surface of aluminum alloy strips

作　　者：郭海龙 陈攀 夏玉良 GUO Haiong;CHEN Pan;XIA Yuiang(Arconic(Kunshan)Aluminum Products Co.,Ltd.,Kunshan 215332,China)

机构地区：[1]奥科宁克(昆山)铝业有限公司,江苏昆山215332

出　　处：《轻合金加工技术》2024年第1期32-35,共4页Light Alloy Fabrication Technology

摘　　要：“爆炸坑”是油冷器管板铝合金带材上常见的表面缺陷,该缺陷不仅影响外观,而且严重的“爆炸坑”可能导致材料变形,增加装配间隙,从而影响钎焊质量。在铝合金带材完全再结晶的退火过程中,增加低温保温阶段,改善除油效果,从而防止高温阶段铝带材表面轧制油在局部密闭空间受热膨胀形成“爆炸坑”。试验结果表明,在200℃保温210min,能够消除铝带材表面大部分轧制油。随后升温到再结晶温度以上进行退火。在后续的分切工序中观察3卷带材,尽管仍能观察到轻微的“爆炸坑”,但“爆炸坑”数量大幅度减少,导致铝带表面变形的“爆炸坑”消失。Explosive dent is a common surface defect on the aluminum alloy strip of the oil cooler tube plate.This defect affects the appearance and may even cause material deforma-tion,increase assembly gaps,and thus affect the quality of brazing.In the heat treatment process of complete recrystallization of aluminum alloy strip,adding a low-temperature hold-ing stage can improve the oil removal effect,thereby preventing the rolling oil on the surface of the aluminum strip from expanding in a local enclosed space during the high-temperature stage,which will result in explosive effects and the formation of explosive dents.The experi-mental results show that holding at 200℃C for 210 minutes can eliminate most of the rolling oil on the surface of the aluminum strip.Then the strip coil is heated up to above the recrys-tallization temperature for annealing.Three coils were observed in the subsequent slitting process,and the results show that although there are slight explosive dents,of which the number significantly decreases,and those leading to deformation on the surface of the alumi-num strip have disappeared.

关 键 词：铝合金 爆炸坑 低温除油 热处理 

分 类 号：TG339[金属学及工艺—金属压力加工] TG166.3