| 摘要 |
PURPOSE:To remove scales and flaws effectively by blasting a high pressure liquid with a blasting material mixed for removal of scales lying within a specfic range, thereafter spraying aqueous solution of nitric acid and fluoric acid, and thereby accomplishing perfect removal of the remaining scales as well as melt polishing on the surface. CONSTITUTION:As a mechanical descaling method for titan or titanic alloy after hot rolling, a high pressure liquid with a blasting material mixed is blasted to remove 80-90wt% of the scales, and then as a chemical descaling method an aqueous solution of nitric acid and fluoric acid is sprayed to perfectly remove the remaining scales in 20-10wt% as well as perform acid wash melt polishing on the surface of said titan or titanic alloy. When the solution of nitric and fluoric acids is sprayed for acid washing, either the concentrations of the nitric and fluoric acids or the time of spraying, or both of them, are adjusted according to the size and depth of flaws produced in the hot rolled plate, so as to alter the amount of melt polishing.
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