Abstract
The proposed method for calculating the loading parameters makes it possible to determine the wear parameters after explosion hardening. The calculation method is simple and less time consuming compared with calculation methods that involve the use of nonlinear programming methods. The main methods of increasing the wear resistance of mining equipment parts using explosion methods are generalized. The reserve for increasing the wear resistance consists in the optimization of deformation parameters during the power and thermal intensification of processes and the development of new methods and technologies of hardening. The factors (parameters) of the studied processes: explosive cladding, alloying, hardening, are formulated. Optimization of the processes under consideration is possible by decomposing the process into simpler ones with subsequent optimization of the parameters of these processes and the synthesis of the obtained solutions. For the first time, a solution to the multicriteria problem of two-stage explosion hardening is presented. It is proposed to split the process into simpler ones. Optimization criteria are proposed for each of the simplified processes. The problem is reduced to a conditional extremum problem, which is solved by composing the Lagrange function. By transforming the wear equation, the optimal ratio of strength and ductility for parts operating under abrasive wear conditions is determined.
Highlights
This research examines the processes of increasing the wear resistance of mining equipment parts using pulsed energy sources
The research is devoted to solving the topical scientific and technical problem of increasing the resource and operational reliability of parts and assemblies of mining equipment. This is due to the fact that at present the physical wear and tear of production assets of the mining and metallurgical complex (MMC) of Ukraine is 70-75%
The costs of repair, installation and dismantling of parts of equipment operating under intensive wear conditions are comparable with its high cost
Summary
This research examines the processes of increasing the wear resistance of mining equipment parts using pulsed energy sources. These processes include explosive cladding with wear-resistant materials, explosion hardening, explosion-thermal hardening and frictional hardening. The research is devoted to solving the topical scientific and technical problem of increasing the resource and operational reliability of parts and assemblies of mining equipment. This is due to the fact that at present the physical wear and tear of production assets of the mining and metallurgical complex (MMC) of Ukraine is 70-75%. The most effective and cheap methods for increasing the wear resistance and durability of mining equipment parts for buckets and bucket teeth for excavators, hammer crusher bits, ball and rod mill armor linings are methods of impulse hardening, alloying and cladding
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