| abstract |
A thin gauge high corrosion-resistant steel and a production method thereof, the chemical composition weight percentages are: C: 0.02-0.06%, Si: 0.1-0.5%, Mn: 0.4-1.7%, P≤0.02%, Cr: 4.0- 6.0%, Ni: 1.0‑3.0%, S≤0.007%, N: 0.004‑0.010%, Als<0.001%, B: 0.001‑0.006%; total oxygen [O] T : 0.007‑0.020%, balance Fe and unavoidable impurities, and at the same time satisfy: one or two elements in Cu: 0.1-0.6% or Sn: 0.005-0.04%; Mn/S>250. The invention utilizes residual Sn, Cu and other elements in scrap steel for molten steel smelting, and selectively adds Cr, Ni and B elements; in the smelting process, the basicity of slag, the type and melting point of inclusions in steel, and the free oxygen in molten steel are controlled. content, acid-soluble aluminum Als content; then use twin-roll thin strip continuous casting to cast the cast strip, and enter the online rolling mill through the lower closed chamber for hot rolling; the cooling after rolling adopts the gas atomization cooling method. |