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为了解决船板氧化铁皮压入引起的麻坑、表面粗糙等表面质量以及存储期腐蚀的问题,采取了控制连铸坯加热制度、提高除鳞系统水压、控制水中Cl-含量,以及优化轧制、矫直工艺参数等措施。结果表明:通过上述措施,除鳞效果有了明显改善,铸坯表面基本上不存在一次氧化铁皮残留;合理控制了表面氧化铁皮结构,增强了表面氧化铁皮的高温塑性,有效解决了表面质量问题;提高了船板表面耐海岸大气腐蚀性能,延长了其在海岸大气环境中的存储时间。
In order to solve the problems of the surface quality such as hemp pit, surface roughening, and corrosion during storage, the control system of slab heating was adopted to improve the water pressure in descaling system, to control Cl- content in water and to optimize rolling System, straightening process parameters and other measures. The results show that the descaling effect is obviously improved by the above measures, and there is almost no primary scale residue on the surface of the slab. The structure of the surface scale is controlled reasonably and the high temperature plasticity of the surface scale is enhanced, which effectively solves the problem of surface quality ; Improve the surface of the ship board coastal corrosion resistance to the atmosphere, extending its storage time in the coastal atmosphere.