热轧高强带钢氧化铁皮的去除方法

热轧板坯中添加硅元素,有利于热轧产品强度提升、制造成本降低,同时提高产品的塑性及韧性。但是,随着硅元素的添加,热轧高强带钢的生产过程中会出现典型的红锈表面缺陷。研究表明,硅与铁生成的2FeO·SiO2化合物是形成红锈的主要原因。采用常规热连轧除鳞系统(系统压力约为22 MPa)很难将红锈彻底清除,要除掉这种氧化铁皮采取超高压除鳞系统除鳞(系统压力约为40 MPa)是最为有效的办法之一。重点介绍了针对去除红锈缺陷,超高压除鳞系统在新建热连轧生产线及热连轧生产线改造中的应用。

Removal method of oxide scale on high strength hot rolled strip

The addition of Si element in the hot rolled slab is beneficial to the improvement of the strength of the hot- rolled products, the reduction of manufacturing costs and the improvement of the plasticity and toughness of the products. But, in the production process of high strength hot rolled steel strip, there will be a typical red rust surface defect with the increase of Si element. The results show that the 2FeO·SiO2 compound produced by Si element and Fe element is the main reason for the defect of red rust scale. The conventional hot strip rolling descaling system (system pressure at about 22 MPa) is difficult to completely remove the red rust and using the ultra high pressure descaling system (system pressure at about 40 MPa) is the most effective way to removing this oxide scale. The applications of the ultra high pressure descaling system for removing the oxide scale on the hot rolled strips′ surface in the new hot strip rolling line and the transformation hot strip rolling line are mainly introduced.