Titanium-containing acid pickling plate and preparation method thereof

Abstract

The invention belongs to the field of steel and iron smelting and particularly relates to a titanium-containing acid pickling plate and a preparation method thereof. The titanium-containing acid pickling plate is prepared from, by weight, not larger than 0.05% of C, not larger than 0.05% of Si, not larger than 0.40% of Mn, not larger than 0.025% of P, not larger than 0.025% of S, not larger than 0.03% of Ti and the balance Fe and inevitable impurities. The invention provides the titanium-containing acid pickling plate excellent in performance and the preparation method of the titanium-containing acid pickling plate. Mainly, by controlling the rolling, cooling and acid pickling tension leveling technology of the titanium-containing acid pickling plate, on one hand, an acid pickling plate yield platform is effectively eliminated, on the other hand, original mobile dislocation density is increased, and therefore the cross break defect of the acid pickling plate lower in yield strength is inhibited. The beneficial effects of being simple in method, low in production cost and excellent in product performance and welding performance are achieved.

Description

technical field

[0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a titanium-containing pickled plate and a preparation method thereof. Background technique

[0002] The pickling plate is made of high-quality hot-rolled sheet as raw material. The pickling unit removes the oxide layer, trims the edge, and finishes. The main processes include hot-rolled raw material decoiling→laser welding→phosphorus breaking by the tension-leveling unit→turbulent pickling→rinsing→ On-line leveling→edge trimming→on-line oiling→baling→packing and storage, its surface quality and use requirements are between hot-rolled and cold-rolled sheets, and it is an ideal substitute for some hot-rolled and cold-rolled sheets.

[0003] The titanium-containing pickling plate is to add a certain amount of titanium alloy to the ordinary pickling plate. The main function is to fix the C and N interstitial atoms in the low carbon steel, and the other function is t...