I. A. KOVALEVA, I. A. OVCHINNIKOVA, S. V. STEFANOVITCH

The problem of friction, wear of machine parts and cutting tools, the need to increase the life of machines makes the task of creating new high-performance, energy-saving technologies of hardening one of the main in engineering. In mechanical engineering, the problem of improving the physical, mechanical and operational properties in thin surface layers (~10 microns) of such parts as shafts, gears, measuring tools, drills, cylinders of internal combustion engines, etc. is important. Currently, these tasks are often solved by applying reinforcing coatings. Cementation is economical. The technology of cemented steels smelting, which is currently used by metallurgical plants, does not ensure stable production of fine-grained structure in products. At the same time, the capacity of machines and units are growing, and to obtain parts that can withstand higher loads while maintaining their overall dimensions, new steel grades are needed. The complexity of the configuration of gears with a thin tooth and a massive sleeve, and the need for minimal warping make heat treatment as difficult and responsible as a complex tool, such as shaped cutters. Therefore, for the manufacture of gears you want to assign steel with small hereditary grain size. In this article we will focus on the development and production of cemented steel in the conditions of OJSC «BSW – Management Company of Holding «BMC», in particular, the steel brand 16MnCrS5 commissioned by the European manufacturer of gearboxes and motors. To determine the grain size of the metal must be subjected to special types of processing for the manifestation of certain characteristics. These results allow us to draw conclusions about the need to adjust the chemical composition of steel grade 16MnCrS5 by introducing a system of modifying elements, which will reduce the tendency of steel to overheating, therefore, reduce the size of austenitic grains. On the basis of the revealed regularities on the influence of carbide-forming elements, a further system of steel modification is determined, which includes a complex of elements V, Nb, Ti.

P. A. VITYAZ’, A. V. TOLSTOY, A. V. VENGURA

The issues of activity of the Council of the research and production center of OJSC «BSW – Management Company of Holding «BMC» aimed at scientific support of modernization of the holding «BMC» are covered. Examples of complex modernization of the existing production and commissioning of new production facilities are given, the concept of development of foundry production at the enterprises of the holding until 2020, priority directions of development of the Belarusian metallurgical plant are considered. Some developments of the Belarusian scientists ready to use at the enterprises are presented.

Based on mathematical and physicochemical modeling a studied the effect of alloying elements (chromium, molybdenum, vanadium) in the formation of the mechanical properties of steel. The intervals of the content of alloying elements that ensure the fulfillment of the required norms are determined. Dependences of the change in the mechanical properties of doped rolled steel from the index of the structural state d are constructed.

This article reveals the main energy efficient solutions and innovations implemented in the framework of the investment project «Organization of production of rolled bar iron with the construction of small-section wire rolling mill» in the open joint stock company «Belarusian metallurgical works (BSW) – Management Company of Holding «Belarusian Metallurgical Company (BMC)». This project was included in the list of the most important projects for the creation of new enterprises and industries that are crucial for the innovative development of the Republic of Belarus. Supplier of technology and equipment for the project were made by the company Danieli & C. Officcine Meccaniche SpA (Italy). The modern and unique equipment used in this investment project allows to use more than 90% of fuel and energy resources (by using the heat recuperator of flue gases, heat recovery boiler, recuperative burners, etc.). Implementation of the project allowed to carry out the maximum processing of production and to receive new production with higher added value.