| abstract |
The invention discloses an ultra-low carbon tin plate with excellent corrosion resistance, which comprises the following chemical components in percentage by mass: 0.004-0.009%, Si is less than or equal to 0.02%, Mn: 0.30-0.50%, P is less than or equal to 0.012%, S is less than or equal to 0.010%, Als: 0.02% -0.08%, Ti: 0.01-0.03%, Cr: 0.07 to 0.15 percent of the total weight of the alloy, less than or equal to 0.004 percent of the total weight of N, and the balance of Fe and inevitable impurities. The invention also discloses a preparation method: smelting, continuous casting, hot rolling, cold rolling, continuous annealing, flattening and electroplating; the annealing soaking temperature is 680-750 ℃, and the annealing soaking time is 20-60 s. The ultra-low carbon tin plate has good stamping processing performance: the hardness grade is T-2, the average cupping value is more than or equal to 9.1mm, and the isotropy is Δ r is less than 0.3; and the corrosion resistance is good: the acid leaching time lag (PL) is less than or equal to 1 second. |