5182铝合金易开盖开裂的原因与改善措施  

Analysis and improvement of cracking issue of 5182 aluminum alloy easy-open end

作　　者：李涛 徐志远 陶志民 杨立民 王芝东 李延成 LI Tao;XU Zhiyuan;TAO Zhimin;YANG Limin;WANG Zhidong;LI Yancheng(Shandong Nanshan Aluminium Co.,Ltd.,Longkou 265713,China)

机构地区：[1]山东南山铝业股份有限公司,山东龙口265713

出　　处：《轻合金加工技术》2023年第3期41-45,共5页Light Alloy Fabrication Technology

摘　　要：针对5182铝合金易开盖开裂问题,结合罐盖料生产和制盖工艺特点,系统分析了漏盖和爆盖原因,并提出相应的改善措施。易开盖的开裂原因包括熔体夹渣,盖料力学性能异常偏高,表面涂蜡量不足,制盖过程异物压入,应力腐蚀,刻线不均,残余金属厚度过薄,等等。相应的改善措施:盖料熔铸生产时使用更高精度的板式过滤器;盖料设定合适的涂蜡量和力学性能控制范围,重点监控涂漆后盖料的实际力学性能;制盖过程控制刻线和清洁生产;易开盖使用、存储和运输环节中保持干燥,必要时进行“暖罐”处理,避免应力腐蚀导致的铝易开盖爆盖问题。采取以上措施后,易开盖开裂问题得到解决。As cracked samples of 5182 aluminum easy-open end(EOE)were detected,the leaking and blowout causes of EOE were systematically analyzed and corresponding measures were proposed based on the production of can end stock(CES)and the technological characteristics of EOE making process.The causes of EOE crack include melt inclusion,abnormally high mechanical properties,insufficient amount of wax coating on the surface,foreign matter press-in during the EOE making process,stress corrosion,uneven score,and too thin residual metal thickness.The corresponding improvement measures include the use of higher precision plate filter in the casting process,the setting of appropriate range of wax coating amount and mechanical properties,and the focus on monitoring actual mechanical properties of coated CES,score control and clean production during EOE making process,measures on keeping dry during EOE use,storage and transportation,and“warm can”treatment if necessary to avoid EOE blowout caused by stress corrosion.After taking the above measures,the problem of EOE cracks has been resolved.

关 键 词：5182铝合金 易开盖 开裂 应力腐蚀 

分 类 号：TG335.55[金属学及工艺—金属压力加工]