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Results of a study of austenitic corrosion-resistant steels of the Fe – Cr – Ni–N–Si alloying system are studied. The steels possess higher parameters of strength (by 25 – 30%) and corrosion resistance (by a factor of 5 – 28) as compared to chromium-nickel steels of type 18–11 serving today in strongly oxidizing media. Comparative analysis of the properties of the new steels and of steel 03Kh18N11 (GOST 5632) widely used in the chemical industry is performed.

1. The ductility of forged semifinished products of steel 03Kh9K14N6M3D is satisfactory in a broad temperature range — from 800 to 1200°. 2. During hot working of the metal the deformation is more even than concentrated. For this reason, the reduction of semifinished products of steel 03Kh9K14N6M3D by free forging should be limited to ∼20–30%. 3. The increase in the grain size during heating of the steel does not have a negative effect on the hot ductility of forged semifinished products.

1. The addition of 2–10% Mo to martensitic steels 13Cr−14Co−6Ni and 9Cr−14Co−6Ni increases the amount of retained austenite. Steels with 13 and 9% Cr become almost completely austenitic with 2 and 10% Mo respectively. Intermetallic phase of the Fe2Mo type is formed, the temperature-time range in which it exists being considerably broader in steels with 13% Cr (at the same molybdenum concentration). 2. Raising the molybdenum content of the steels investigated increases the strength slightly and lowers the toughness after quenching due to formation of Fe2Mo in grain boundaries. 3. Tempering of martensitic steels with 9% Cr at 500° leads to a substantial increase in strength, the effect increasing with the molybdenum content from 2 to 6% Mo. The increase in the strength of the steel with 9% Cr to 210 kg/mm2 after tempering is evidently due to the formation of finely dispersed intermetallic R phase. Tempering at 500° does not induce any increase in the strength of steels with 13% Cr and 2–10% Mo, which have an austenitic structure. 4. Steels of the 9Cr−14Co−6Ni system alloyed with 2–6% Mo can be used as the basis for the development of high-strength corrosion resistant steels retaining their toughness at low temperatures.

1. In chromium-nickel corrosion-resistant strip prepared by the standard technology a secondary recrystallization texture (100) 〈100〉 forms. 2. A correct degree of deformation and heat-treatment schedule selected in production of cold-rolled strip makes it possible to obtain a texture (113) 〈112〉, (120) 〈100〉 with favorable elasticity property anisotropy for deep drawing.