Evseeva N. The enhancement of mechanical and working properties of chrome-nickel-manganese single-purpose steel.

The research subject is the structure and properties formation processes of corrosion-resistant steels while deformation and heat treating. The research object is the influence of chemical composition and operating temperature on structure and physical- mechanical properties of the developed 03Х17Н3Г9МБДЮч steel. The aim of the research is the development of corrosion-resistant steel composition with enhanced properties compared to its analogues. The research also aims to simultaneous reduction of the spongy titanium polluting with steel components caused by interaction with spongy titanium magnesiothermal production reduction process medium. Methods of research: optical and electron microscopy, sickly and X-ray phase analysis, dilatometric method measure, microhardness of structure composition, statics research to stretch, research of corrosion resistance, mathematics monitor results of research.The results attained: 03Х17Н3Г9МБДЮч steel capacity to self-passivation expanding its applicability in chloride medium with various pH level has been established . The capability of additional steel strengthening by 20 to 30% at the expense of deformation and martensitic transformation in cold plastic deformation conditions has been shown. Efficient composition and special heat treatment conditions for 03Х17Н3Г9МБДЮч steel have been developed. The results have been introduced at Pavlogradgradchimmash plant and expected economic effect 437976 grn. and ZNU and ZNTU teaching and learning activities. Area of application - mechanical engineering.