Tribotechnical characteristics of the Ti-Cr-system hard alloys produced by the explosive compaction of powders containing 20, 30, 40, and 50 vol % of the titanium binder are investigated. The general ...approach to selecting the optimal structure and properties of wear-resistant hard alloys for manufacturing the slider bearing parts working in pair with silicicated graphite in conditions of water lubrication is formulated. It is shown that, in order to attain the highest antifriction characteristics and minimal wear of the friction unit, the alloy should have the maximally possible hardness with the minimally admissible specific volume of a carbide phase in the material structure. It is established that the mentioned alloys have higher antifriction characteristics and wear resistance than silicicated graphite and the Cr
3
C
2
-20% Ni-type materials produced by conventional methods.
In the investigation of thermoplastic vulcanizates, the equilibrium swelling method is used to determine the effectiveness of crosslinking of the elastomer component. The methods used for assessment ...are extremely varied and contain a whole number of assumptions. Here, Gaidadin et al assess the influence of the thermoplastic and its contribution to the structure formation of thermoplastic elastomers.
Establishing basic friction parameters of new hard alloys to be used for the fabrication of sliding weight-bearing components that work in conjunction with silicified graphite in water lubrication is ...an important task. Completing this task will help determine principles for selecting a tailored arrangement of components to comply with the operational conditions of the friction pair. The antifriction properties and durability of chromium carbide hard alloys during sliding friction over silicified graphite in water are conditions generated by alloy hardness and chromium carbide volume fraction in the material structure. The wear of a friction pair may be reduced by one order of magnitude if explosively pressed chromium carbide and titanium-based alloys replace such traditional materials as silicified graphite or hard alloys of chromium carbide with nickel.
Metallography reveals the correlations between the amount, size, and morphology of ultrafine particles in welding materials (flux-cored and composite wires, coated electrodes, and agglomerated ...fluxes), as well as the processes of formation of exogenous crystallization centers in the welding pool that facilitate the structure modification and promotion of processing and working properties of deposited metal. The phenomenological model of the nucleation on ultrafine exogenous refractory chemical clusters is developed on the basis of the experimental data and on the existing view of the kinetics of fast physicochemical processes in the welding fire point.
The ambivalence of the content of the term «stability» of machining processes in the transition to the construction of digital production is established based on the analysis of regulatory and ...technical documentation regulating the issues of product quality management in mechanical engineering. It is shown that the Fisher criterion can be a quantitative assessment of the stability of processes that are in a state of statistical controllability.
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