Research and application of oxide scale control technology in rolling process
Based on the basic research of oxide scale formation mechanism and different typical defects on the strip surface,the influencing factors of oxide scale formation associated with different structure and thickness were analyzed in detail.Aimed at three kinds typical oxidation layer,i.e.α-Fe+ Fe3O4,FeO and fine Fe3O4/Fe2O3,the structure and thickness control method were obtained.At the same time,the influence of finishing roll roughness on the strip surface quality and subsequent painting quality were studied.The research results were applied to the actual production,the surface free treatment steel,easy-pickling steel and the scale direct hydrogen reduction annealing hot galvanizing products,abbreviated to DRG steel,had been developed out.Free treatment products includes free-pickling steel and free-blasting steel,which were used in the manufacture of heavy truck bearing frame and container side panel respectively.Easy-pickling steel process can significantly reduce hydrochloric acid consumption,improve production efficiency and quality of pickling.The DRG steel process was applied in hot galvanizing production line,using hydrogen direct reduction method to manufacture qualified zinc-coating products,the pickling process was canceled.These technologies and products contained new ideas of flexible manufacturing,reduced the environment pollution and the manufacturing cost.The technical route of the oxide layer control and application were formed.
oxide scalefree-pickling steelfree-blasting steeleasy-pickling steelDRG process
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NSTL
万方数据
维普
