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Development of metallurgy in Russia and CIS
Название Prospects of development of dimension range, quality and power-saving technologies for rolled steels and alloys applied in hi-tech strategic industries
Автор Ya. I. Spektor, I. N. Kunitskaya, A. S. Salnikov, A. N. Tumko, M. E. Sazhin, Yu. V. Derkach
Информация об авторе

Laboratory of Physical Metal Science, State Enterprise “Ukrainian State Research Institute of Special Steels, Alloys and Ferroalloys” (Zaporozhye, Ukraine):

Spektor Ya. I., Cand. Eng., Head of Laboratory, Chief Metrologist, e-mail: yaispektor@mail.ru
Kunitskaya I. A., Scientifi c Researcher


Central Plant Laboratory, Dneprospetsstal Electrometallurgical Works (Zaporozhye, Ukraine):

Salnikov A. S., Cand. Eng., Head of Laboratory
Tumko A. N., Cand. Eng., Head of Rolling Dept.


State Enterprise “State Institute of Designing Industrial Works “GIPROPROM” (Zaporozhye, Ukraine):

Sazhin M. E., Chief Engineer


Ukrainian Ministry of Economical Development and Trade (Kiev, Ukraine):

Derkach Yu. V., Deputy Head of Administration of Industrial Development. Head of Dept. of Development of Mining-Metallurgical Complex and Chemical Industry, Section of Industrial Policy


It is shown that application of through energy-saving technologies of combined deformation-heat treatment in rolling lines is a perspective direction in the development of production of competitive rolled products of special steels for strategic industrial branches. Energy-saving is achieved, firstly, due to either elimination or a significant reduction (by 30–70%) of time of heat treatment with separate heating and using of the heat from rolling heating in the process of quenching, normalization and annealing of structural, corrosion-resistant, bearing, tool and other special steels. Secondly, energy-saving is achieved due to the accelerating effect of multi-pass hot deformation on the both structural and phase transformations directly in the deformation area (due to the dynamic recrystallization) and during post-deformation cooling. As a result, structural effects are realized. Additionally, increase of the complex of physical-mechanical properties of special steels is ensured, what is unattainable in conventional technology. The grain size and the average size of carbides are reduced; the number of the carbide network as well as the remnants of lamellar pearlite are decreased; the uniformity and dispersity of globular perlite increase after annealing of bearing and tool steels. The contact endurance of bearings, fracture energy and operational stability of the track pins, long products (for example, boring rods) and other parts from rolled products with combined deformation-heat treatment are increased. The experience of the commercial testing of combined deformation and heat treatment, data analysis about the influence of technology on structure and properties of special steels and alloys are used in establishment of recommendations for technological tasks (TLZ) for designing of new modular lines of combined deformation-heat treatment of rolled products of special steels.

Ключевые слова Rolling, heating, cooling, grain size, power-saving technologies, special steels, post-deformation treatment, physical-mechanical properties
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