拉环用5182铝合金扁铸锭热轧裂边分析

Cracked Edge Analysis of Hot Rolled 5182 Aluminum Alloy Slab

生产拉环料用的5182扁铸锭在热轧时容易产生板坯大裂口和带卷大裂边现象,借助化学成分分析、金相组织检查等手段,探讨了5182铝合金扁铸锭在热轧时裂口及裂边的原因,它是在熔铸过程中产生了"钠脆"及边部的组织疏松,导致基体金属脆性大、结合力弱,在外力作用时产生了裂口现象,结合该合金的特性及现场实际生产情况提出了一些解决办法。

5182 Aluminum alloy slab for ring tab is easy to produce slab split and coil edge crack during hot rolling. By means of chemical analysis and metallographic inspection to discuss the reason of split and edge crack of 5182 slab during hot rolling. It is to produce ＂sodium embrittlement＂ and edge loose in the process of melting, which cause high metallic brittle and weak bond force, and as a result it formed cleft by external force. Combined with the alloy characteristics and actual site production situation proposed some solutions.