| abstract |
A thin-gauge high-corrosion-resistant steel and its production method, the weight percentage of its chemical composition is: 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%, the balance being Fe and unavoidable impurities, while satisfying: Containing one or two elements of Cu: 0.1‑0.6% or Sn: 0.005‑0.04%; Mn/S>250. The present invention utilizes residual Sn, Cu and other elements in scrap steel to smelt molten steel, and selectively adds Cr, Ni, and B elements; during 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 the casting strip is cast by twin-roll thin strip continuous casting, and enters the online rolling mill through the lower airtight chamber for hot rolling; the cooling after rolling adopts the gas atomization cooling method. |