Abstract
AbstractThe analysis of methods for restoring the diesel engine exhaust valve clamping cone surface is performed in this paper. The results of the study are based on the most common methods for restoring the surfaces of such parts as electric arc surfacing, gas-vapor and plasma spraying in a protective gas media. The work takes into account the experience of the authors studying various thermodynamic processes in the regeneration of the parts’ surfaces. The article presents the results of micro and macroanalysis of structures obtained after surface regeneration. The evaluation was carried out according to such criteria as adhesion [MPa], microhardness HV, solubility and chemical composition [wt., %]. The advantages and disadvantages of restoring the exhaust valve surface under local energy impact in various ways are substantiated.KeywordsValve regenerationGas-flame sprayingElectric arc surfacingPlasma sprayingScheelite concentrateBoronCarbon
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