Bulletin PNRPU. Mechanical engineering, materials science

The interrelation of composition, structure and chemical properties cubic (type NaCl) refractory interstitial phases (RIP) – carbides, nitrides and monoxides transitive metals IV, V groups is investigated. Regularities of reactions of RIP with various solid reagents (transitional metals of IV, V groups, their oxides, carbon) are discussed. It is established that chemical activity of RIP components is function their thermodynamic activity. It is shown that chemical activity of RIP components is function their thermodynamic activity. It is noted that regularities of change of the RIP chemical activity in the field of their homogeneity and in the rank MeC–MeN–MeO are in good agreement with the solid solution nature of these phases.

The article shows how to use quality management techniques and technology of risk assessment, taking into account the specifics of the production were identified by the technological aspects that lead to the appearance of defects in the production of highly porous marriage permeable porous material based on hromal, and an assessment of the impact of ultrafine powders of environmental environment and staff, as a result of which it is possible to make objective management decisions to continually improve the process.

Changes in the design of pneumatic hammers for modernization and reduction of environmental impact have been proposed. The proposed design approach can provide a reduction in air leakage from the compressor and working cylinders, which increases the efficiency of the machine. A proposed engineering solution, which shifts the pneumatic hammer to the oncoming impact, has been derived. The proposed solution simplifies pneumatic hammer service and reduces machine total mass by the removal of the anvil block.

Influence of the composition for b-sialon production on the sintered product has been studied. During the sintering in the vacuum furnace at 1750 °С at nitrogen atmosphere sialons of different composition were obtained: Si2Al4O4N4, Si3Al3O3N5.

Technological features automatic submerged arc welding assembly units of steel various thickness, the remaining lining, cushioned flux, copper lining were considered.

In work the research results of the processes at electron beam welding with high power density are reviewed. The use of secondary emission signals for operative control of weld formation is highlighted, too.

The equipment are designed and manufactured for the hardness determination of composites materials in accordance with standard test methods GOST 4670–91 and ISO 2039-1:2001. The ball indentation hardness of composites materials based on the expanded graphite was determined.

At the article the organizationally-pedagogical conditions of formation of common cultural competences at students of technical specialties are considered. The developed conditions include educational system, a methodic of realization of educational system model and a methodical documents complex.