Nº 4 (142) (2023)
Materials science in mechanical engineering
INVESTIGATION OF POSSIBILITY OF SYNTHESIS OF THE COMPOSITION «TITANIUM NITRIDE – TITANIUM SILICIDE» USING SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS AZIDE TECHNOLOGY
Resumo
The results of the study into the possibility of synthesis of the composition "titanium nitride - titanium silicide" from the mix-ture 3Na2SiF6 + Ti + 12NaN3 are present-ed. The end- product (powder) with a spherical particle shape and an average size of 150...250 nm has been obtained. The phase composition of the synthesized product has been found where besides the phases TiN, Ti5Si3 and TiN0.30, additional synthesis products such as α-Si3N4, β-Si3N4 and Si are included.
3-11
Welding, related processes and technologies
WELDING PROPERTIES INDICATORS IN FUSION WELDING OF PROSPECTIVE ALUMINUM ALLOYS BASED ON THE AL–CA–ZN–MG SYSTEM
Resumo
The results of a study of the welding properties of new aluminum alloys Al–1,0Ca–5,5Zn–1,5Mg–0,5Mn and Al–2,0Ca–2,5Mg–0,4Mn are presented. The mechanical properties of the studied alloys in argon arc and laser welding are determined. The power of Al-1,0Ca–5,5Zn–1,5Mg–0,5Mn and Al–2,0Ca–2,5Mg–0,4Mn alloys to the formation of pores in the seam in fusion welding is viewed.
11-23
24-29
Additive technologies and laser processing
FORMATION OF A HETEROPHASE STRUCTURE OF LASER DOPING ZONES IN ALUMINUM ALLOYS FOR THE IMPROVEMENT OF ANTIFRICTION PROPERTIES OF THE SURFACE
Resumo
The issues of laser doping of aluminum alloy surfaces using laser doping technique (LDT) are viewed. Within the framework of studies surface currents and velocity fields using laser doping are modeled. The structure of the zones subjected to LDT has been analyzed, and antifriction properties of the obtained heterophase structures have been investigated.
30-36
Technologies of mechanical processing of workpieces
INFLUENCE OF REVERSIBLE SURFACE PLASTIC DEFORMATION PARAMETERS ON THE PARAMETERS OF THE SURFACE WAVINESS OF CYLINDRICAL PARTS
Resumo
The results of experimental studies to determine the influence of the parameters of reversible surface plastic deformation on the parameters of the surface waviness of cylindrical parts made of steel 45, are presented. The proposed method implemen-tation for finishing and hardening treatment requires the development of a device for the formation of a reversing circular motion of the working tool. On completion of experimental studies using the PyCharm computer program and Python pro-gramming language, optimal modes of simplification were determined, providing the lowest waviness height.
37-48