新一代热轧板带材表面氧化铁皮控制技术的现状与进展

State of the art development on technology for new generation to controlling oxide scale of hot rolled plate and strip

热轧板带材作为海洋、交通、能源等行业的支柱性原材料,力学性能与尺寸精度一直是衡量其质量的最重要指标。然而随着相关行业的转型升级,对其表面质量也提出了严苛的要求,导致大量钢材产品由于表面不过关被降级或判废。由于钢材的氧化在热轧过程中贯穿始终,并受到合金元素及诸多工艺参数的交互影响,很难实现结构、厚度、均匀性的精准控制。尽管前期围绕着"黑皮钢",已经开发出了一些氧化铁皮的控制方法,但仅局限于强度较低、厚度较薄的汽车结构钢。为此,东北大学轧制技术及连轧自动化国家重点实验室开发了新一代热轧板带材表面氧化铁皮控制技术,其研发与应用全面提升了我国热轧钢材产品的表面质量。目前,所生产的系列高表面质量产品已达到了国外企业对钢材表面质量的苛刻要求,成功助力我国钢铁行业产品结构的转型升级。

As a pillar material of marine,transportation,energy and other industries,the mechanical properties and dimensional accuracy of hot rolled plate and strip have always been the most important indicators to measure its quality.However,the surface quality is also put forward strict requirements with the transformation and upgrading of related industries,resulting in a large number of steel products being degraded or rejected due to the surface failure.It is difficult to control the structure,thickness and uniformity precisely of oxide scale,because the oxidation of steel runs through the whole hot rolling process and is affected by the interaction of alloy elements and many process parameters.Some methods of scale control have been developed around the steel with tight scale in the early stage,but which are only limited to the automobile structural steel with low strength and thin thickness.For this reason,a new generation technology to controlling oxide scale of hot rolled plate and strip has been developed in China by the State Key Laboratory of Rolling and Automation of Northeastern University,which significantly improves the surface quality of hot rolled steel products.At present,the series of products with high surface quality meet the harsh requirements of foreign enterprises after the application of this new technology,and successfully help the transformation and upgrading of the product structure of the steel industry in China.