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Eco pickled surface (EPS) is a process applied to hot rolled sheet steel to remove all surface oxides (mill scale) and clean the steel surface. Steel which has undergone the EPS process acquires a high degree of resistance to subsequent development of surface oxide (rust), so long as it does not come into direct contact with moisture. EPS was developed by The Material Works, Ltd., which has filed several patent applications covering the process. It is primarily intended to be a replacement of the familiar acid pickling process wherein steel strip is immersed in solutions of hydrochloric and sulfuric acids to chemically remove oxides.
Method for manufacturing a thin gauge hot formed pickled steel
The application discloses a kind of manufacturing methods of thin gauge hot forming pickling steel, including the following steps: hot metal desulphurization, converter smelting, refining, thin slab continuous casting, rotary descaling, soaking furnace heating, finishing rolling, coiling, cooling, flattening, straightening, pickling, rust-proof coating.The thin gauge hot forming pickling steel manufactured by the application has good structure and performance, and also has good pickling surface quality, that is, the surface iron oxide scale indentation defect of the thin gauge hot forming pickling steel is ≤2 places / 1000 m; the surface plate width middle portion whiteness value of the thin gauge hot forming pickling steel is ≥70%, and the difference between surface plate width edge portion whiteness value and middle portion whiteness value is ≤5%; the surface black and white stripe color difference defect number of the thin gauge hot forming pickling steel is ≤5 strips / 1000 m, solving the unique surface quality problem in the thin gauge hot forming pickling steel thin slab continuous casting and rolling production process.
Owner:BAOSHAN IRON & STEEL CO LTD