The results of microstructure analysis of polymeric material around an epoxy oligomer cured by diaminodiphenylsulfone, as well as of thermoplastic polymers like polysulfone and polyarylene ester ketone, are presented. Calculation of the operating life of items produced from this material during multicycle loading is carried out.

The article compares the properties of multilayer composite wear-resistant coatings of Zr–ZrN–(Zr, Mo, Al)N, Ti–TiN–(Ti, Mo, Al)N, and Cr–CrN–(Cr, Mo, Al)N. The investigation was focused on hardness, resistance to fracture during scratch tests, elemental composition, and structure of the coatings. Experiments were carried out to study the wear resistance of coated carbide tools during the turning of 1045 steel and of NiCr20TiAl heat-resistant nickel alloy. With the elemental compositions identical in the content of molybdenum (Mo) and aluminium (Al), identical thicknesses and nanolayer periods of λ, the coatings being studied demonstrated a noticeable difference in wear resistance. Both during the turning of steel and nickel-based alloy, the highest wear resistance was detected for tools with the Zr–ZrN–(Zr, Mo, Al)N coating (the tool life was 3–5 times higher than for uncoated tools). The good wear resistance of the Zr–ZrN–(Zr, Mo, Al)N coating may be related to the optimal combination of hardness and plasticity and the active formation of molybdenum oxide (MoO₃) on the coating surface during the cutting, with good tribological and protective properties.

Apart from subtractive machining technologies, additive and net-shape replication technologies are being developed and hybrid technologies appear. In particular, PIM (MIM, CIM) technologies,...

Contemporary and future-oriented mechanical engineering requires the use of a new set of methods for processing, manufacturing, changing the state of materials implemented in the production process. In particular, the level of modern and prospective blank part production industries is largely related to the development of injection molding of structured multiphase materials - powder and granule technologies of a new generation. In this article, such widely used by foreign industry modern injection molding technologies of structured multiphase materials as the powder injection molding (PIM) technology and the thixoforming technology, are considered. A description of specific rheological effects that determined the fundamental possibility of the appearance and practical application of these technologies is given, and some of the most relevant physico-mathematical models of rheological behavior of structured multiphase materials are considered. In addition, the article demonstrates the efficiency of implementation and high potential for development of powder injection molding technology (PIM) for mass production of small-sized shaped parts in Russian Federation. The need for the development of educational programs and standards, including special disciplines and courses aimed at training technical professionals not only in the field of present commonly used technologies, but also such promising technologies as powder injection molding (PIM) and thixoforming, was noted as w

Based on the experience of foreign colleagues studied in publications and own exploratory work, the authors offer their own vision of the current knowledge and problems of numerical simulation of the injection molding process of feedstoks in PIM-technology. The results of the simulation of the injection molding of challenging component are presented in the Autodesk Moldflow software package.

A brief review of the modem development of thixotropic metallurgy as a new direction in the field of science and technology of metal processing is offered.