Present Furnace and Pot Roll Coatings and Future Development
Present Furnace and Pot Roll Coatings and Future Development
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炉用和罐式辊涂的现状及未来发展
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
H. H. Fukubayashi
中科院分区：
文献类型：
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作者：
H. H. Fukubayashi
在最近的过去，世界各地的汽车制造商开始要求非常高的表面质量的板材，特别是用于裸露面板的板材。为了满足这一要求，大多数带钢生产商开始在退火区、镀锌区和其他加工区的几乎所有轧辊上使用一种或另一种热喷涂层。事实上，如果不使用辊涂，就不能生产用于曝光应用的板材。镀锌生产线入口和出口的马尾辊和蓄电池辊通常都涂有碳化钨或碳化铬和/或氧化物陶瓷。这些涂层可防止轧辊表面损坏，并提供适当的摩擦力/抓地力。在某些情况下，质地适当的涂层可在带材表面提供所需的特性或轮廓。炉膛和热张力马尾辊的涂层可防止因滑移、铁屑或炉膛气氛的意外变化而产生的毛刺。镀锌锅和稳定器辊上的涂层不仅可以防止渣子粘连，还可以提供足够高的摩擦力，以消除水滑。导向器或塔辊也涂有碳化物或陶瓷，以最大限度地减少锌的吸收率。一般来说，轧辊上的涂层可以使生产线平稳运行，并产生改善的带钢表面。同时，它允许延长使用寿命，从而减少维护停机频率。本文试图对这一技术的现状进行回顾，并对未来的发展进行预测。
In the recent past, automotive manufacturers worldwide started to demand sheet metals with very high surface quality, particularly those used in exposed panels. In order to meet this requirement the majority of strip producers started to use thermal spray coatings of one kind of another on essentially all the rolls in annealing, galvanizing, and other processing sections. In fact, no sheet for an exposed application can be produced without the use of roll coatings. Bridle and accumulator rolls in both entrance and exit ends of a galvanizing line are usually coated with tungsten or chromium carbide and/or oxide ceramic. These coatings prevent surface damage on the roll and provide proper friction/grip. In some cases, a properly textured coating provides the desired characteristics or profile on the strip surface. Coatings for furnace and hot tension bridle rolls prevent pickup due to slippage, iron fines, or an accidental change in the furnace atmosphere. The coating on pot and stabilizer rolls in a galvanizing pot prevents not only dross adhesion but also provides high enough friction to eliminate hydroplaning. Deflector or tower rolls are also coated with carbide or ceramic to minimize zinc pickup. The coating on rolls, in general, allows smooth operation of the line and produces an improved strip surface. At the same time, it allows an extension in service life, thus reducing frequency of maintenance shutdown. This paper attempts to review the present state of the art and predict future development.