Search for the Optimal Soaking Temperature for Hyperquenching of the Gx2crnimocun 25-6-3-3 Duplex Cast Steel

Abstract The paper presents the research results on duplex corrosion-resistant chromium–nickel–molybdenum cast steel of GX2CrNiMoCuN 25-6-3-3 grade. aim was to determine effect soaking temperature for hyperquenching process T p , that is, 950 1200 °C, microstructure and mechanical properties, is UTS tensile strength, yield HB Brinell hardness, elongation EL impact strength KV steel, under industrial conditions with minimum content Cr, Ni, Mo Cu according PN-EN 10283 standard. On basis results, it confirmed guarantees elimination brittle intermetallic phase in microstructure. In addition, most favorable strength-to-ductility ratio an almost equal amount austenite γ ferrite α its obtained using soak 1080 which considered optimal above-mentioned steel.