油斑是铝箔成品退火过程中产生的主要缺陷之一,可造成废品。所谓油斑,一般是指箔材表面的轧制润滑油经成品退火而形成的黄褐色斑,主要集中在箔卷的两端面或分布在靠近端面的边部上。与东北轻合金加工厂和上海铝材厂相比,我厂轧制润滑油的循环周期长,一般3—4个月更换一次,成品退火的箔材较宽,540—560毫米,而成品退火制度一直沿用高温,即炉内定温 Oil spot is one of the main defects in the annealing process of aluminum foil products, which can cause waste products. The so-called oil spots, generally refers to the foil surface of the rolling lubricant by the finished product formed by the brown spots, mainly concentrated in the two ends of the foil roll or distributed near the end of the edge. Compared with the Northeast Light Alloy Factory and Shanghai Aluminum Factory, I plant rolling cycle of lubricating oil long, usually 3-4 months to replace the finished annealed foil wider, 540-560 mm, and finished annealing The system has been using high temperature, that is, the furnace temperature