| 摘要 |
The invention relates to metallurgy, more particular, to corrosion-resistant steels alloyed by chromium and nickel used for manufacturing reactors (retort) used for production of spongy titanium in magnesium-thermal apparatuses. A high-temperature corrosion-resistant steel comprises, Fe as a base, C, N, Mn, Si, Cr, Ni, V, at least one rare-earth metal from Ce, La, Pr, Nd, further comprising Ti and at least one element from the group of Nb, Ta, Zr, Hf as carbide- and nitride formers with the following wt% ratio: C 0.04-0.15; N 0.01-0.25; Si 0.1-1.0; Mn 3.0-12.5; Cr 11.7-15.0; V 0.05-0.5; one or several rare-earth metals from the group of Ce, La, Pr, Nd 0.0001-0.01; Ti 0.1-2.0; one or several elements from the group of Nb, Ta, Zr, Hf 0.05-0.2. The technical result is aimed at improving heat and corrosion resistant steel properties in corrosive medium in magnesium-thermal apparatuses used for production of spongy titanium wherein reducing pollution thereof by detrimental impurities. |
