Industry 4.0, Vol. 5 (2020), Issue 1, pg(s) 3-6

    New generation of digitized factories in Industry 4.0 is based on a combination of cyber-physical systems (CPS) and digital technologies, to provide an integrated and intelligent synergy in production process, linking the physical, digital and virtual world. Industry 4.0 uses production systems, CPS, CPPS, SCPS and robots in combination with digital technologies IoS, IoP, IoT, IIoT, IoE, CC and etc. The digital infrastructure of a country can be evaluated using different development indices, such as: IDI, EGDI, TII, OSI and etc. The paper is given of trend analyzes of development indices (DI) for using ICT and the Internet., EGDI and TII in Georgia for the period 2003 to 2018.

  • The influence of heat treatment on properties of steel for cementation

    Materials Science. Non-Equilibrium Phase Transformations., Vol. 5 (2019), Issue 1, pg(s) 13-15

    During the injection molding procedure of plastics, the gear pumps in their work are exposed to the effect of elevated pressure and temperature. On one of these pump there has been frequent downtime due to breakage of the driven gear. Gears which were installed as standard spare parts had stood out in operation for three months. On a sample of a broken gear were perfomed laboratory examinations (metallographic examinations, hardness control on cross-section and surface of the fracture was examined). Conclusion was that it was high quench hardening of a steel of which a part is made, the most likely cause of the fracture of a standard gear. In order to extend the useful life, two test gear are made from steel for cementation 20MnCr5. By applying the appropriate parameters of thermal chemical treatment useful life of the gear is significantly extended, after which the test gears have worked for nine months from the moment of installation.



    Machines. Technologies. Materials., Vol. 12 (2018), Issue 3, pg(s) 132-135

    In this paper the laboratory tests on the selected steel for cementation 20MnCr5 was perfomed. The influence of the contact load resistance to the adhesion wear of high-temperature carbonitrided MnCr steels was analyzed. As a representative example was selected a tribosystem drive/driven gear of reducers in which are expressed high contact loads. For the purposes of these tests, the samples were first high-temperature carbonitrided, and then they are carried to the appropriate chemical and metallographic analysis, control of the surface hardnesses and the resistance to the adhesion wear. The aim of this paper was to observe the representative tribosystem as much possible to define its working parameters in order to determine the optimum conditions for testing the influence of the contact load on resistance to the adhesion wear. The analysis results show that high-temperature carbonitrided steel where the atmosphere of furnace at the beginning of carburizing was enriched with nitrogen, and finally with carbon showed significantly greater resistance to the adhesion wear compared to steel that at the beginning of carburizing had atmosphere of furnace rich in carbon, and finally with nitrogen.