The effect of long-term thermocycling and mechanical loads on the corrosion resistance of novel nitrogen austenitic Cr – Ni – Mn steels melted under laboratory conditions is studied in various aggressive environments. The steels are subjected to 400 thermal cycles in the temperature range from –100 to 100°C and to cyclic mechanical loading during 1 × 10⁶ cycles. The structure and the mechanical properties of the steels after the cyclic loading are studied. Tests for resistance to general and pitting corrosion in sea water (3% NaCl) and in an acid environment (0.5M H₂SO₄ including blasting with hydrogen sulfide), to pitting corrosion in an aqueous solution of iron chloride, to intercrystalline corrosion in a test solution, to corrosion cracking under load, and for cavitation damage in a 3% solution of NaCl are conducted. It is shown that the developed high-strength nitrogen austenitic steels 10Kh19G10N6AM2 and 09Kh19G10N6AM2D2 both in the initial condition and after the thermocycling and cyclic mechanical loading have high resistance to the types of corrosion studied, which exceeds the resistance of steels 04Kh18N9 and 04Kh18AN9. Requirements on the composition and the structure of the steels are developed.

在各种侵蚀性环境下，研究了长期热循环和机械载荷对新型氮奥氏体Cr-Ni-Mn钢在实验室条件下熔化的耐腐蚀性的影响。钢材在–100至100°C的温度范围内经受400次热循环，并在1×10 ⁶循环中经受循环机械载荷。研究了循环载荷后钢的组织和力学性能。在海水（3％NaCl）和酸性环境（0.5MH ₂ SO ₄）中对一般腐蚀和点蚀的测试包括硫化氢喷砂），氯化铁水溶液中的点蚀，试验溶液中的晶间腐蚀，负载下的腐蚀裂纹以及在3％的氯化钠溶液中的气蚀破坏。结果表明，已开发的高强度氮奥氏体钢10Kh19G10N6AM2和09Kh19G10N6AM2D2在初始条件下以及热循环和循环机械载荷后均对所研究的腐蚀类型具有较高的抵抗力，超过了04Kh18N9和04Kh18AN9钢的抵抗力。提出了对钢的成分和结构的要求。