The preparation method of wide pure nickel cold rolled coil includes the following steps: Step 1: Air annealing treatment of pure nickel hot rolled sheet; Two, the pure nickel hot rolled sheet is cold rolled to break the scale, pickling treatment to remove the oxide skin, plate; Three, in the finishing machine will be a number of plate head and tail cut, and then plasma welding, winding, get rolling blank; Four, roll the billet for a rolling process, get the coil; Five, degreasing treatment; 6. Vacuum annealing treatment; Seven, uncoiling, cutting the lead part of the head and tail, to get wide pure nickel cold rolled coil; Or repeat step 4 to Step 6 once to uncoil and remove the head and tail lead strip to obtain wide-width pure nickel cold rolled coil. The invention has the advantages of simple method, easy to realize industrial production, and can prepare pure nickel coil with thickness of 0.5mm ~ 2.0mm and width of 1200mm ~ 1400mm through one or two times of cold rolling, filling the blank of wide pure nickel coil in China.
The technical problem lies in providing a thickness of
O. 5mm ~ 2. Omm, method for preparation of wide-width pure nickel cold rolled coil with width 1200mm ~ 1400mm. The method is simple and easy to achieve industrial production, which fills in the blank of wide-width pure nickel cold-rolled coil in China, and can produce wide-width pure nickel cold-rolled coil with good plate shape, smooth surface quality, endless crack, fine and uniform structure and properties meeting the requirements of the standard.
A method for preparing wide-width pure nickel cold-rolled coil. The grade of the pure nickel hot-rolled sheet mentioned in step 1 is N4, N5, N6, N7, UNS N02200 or UNS N02201. The annealing temperature in step 1 is 650°C ~ 750°C, and the annealing time is Ih ~ I.5h.
The thickness can be obtained by I ~ 2 times cold rolling
O. 5mm ~ 2. Omm, with a width of 1200_ ~ 1400_ pure nickel coil, fills the gap of wide pure nickel coil in China. 2. In order to ensure the sheet shape, the tension is exerted on both ends of the sheet during rolling, and the rolling process of constant roll gap and multi-pass small pressure reduction is adopted. The prepared sheet has good sheet shape, smooth surface quality, endless crack, fine and uniform structure, excellent performance and meets the standard requirements of wide pure nickel cold rolled sheet.
