Generalized Model of the Quality Status of Surface Critical Parts of Ship Power Plants Made of Composite Plastics

Bezpalchuk, Sergey Nikolaevich; Буцанец, Артем; Петров, В. М.

doi:10.21821/2309-5180-2015-7-1-97-102

Vestnik GUMRF imeni admirala S. O. Makarova

2015

DOI: 10.21821/2309-5180-2015-7-1-97-102

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Generalized Model of the Quality Status of Surface Critical Parts of Ship Power Plants Made of Composite Plastics

Sergey Nikolaevich Bezpalchuk¹,

Артем Буцанец²,

В. М. Петров³

Abstract: 98 pair. The article presents a generic model of the quality status of the surface layer of the friction pairs of composites. This model includes the parameters: micro-surface geometry, geometric accuracy, technological residual stresses and elastic hopelessly deformation. To determine the technological residual stresses method of indentation diamond indenter into the surface layer, where on the chart the introduction of the diamond tip at different sites to determine the elastic and plastic components. Microg… Show more

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Investigation of dimension accuracy formation in casting patterns carried out by method of additive technologies for foundry

Буцанец¹,

Ольховик²,

Ol'khovik³

et al. 2016

Science Intensive Technologies in Mechanical Engineering

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The results of investigations on the use of additive technologies for manufacturing geometrically complex patterns in foundry technology are presented. The purpose of this work is the investigation of possibility to use as pattern materials – PLA and ABS plastic according to the technology of the layer-by-layer application of melted pattern material through an extruder. In the paper there is considered an alternative method which consists in printing basic units on a 3D printer with subsequent manufacturing patterns made of them for casts. For 3D pattern conversion into a set of instructions for the motion of a printing head there was used Replicator G (free software). The parameters of dimension accuracy and a rate of pattern material burning were investigated inasmuch as a slow gasification can result in unsatisfactory filling of a mold with melt and as a consequence in the defect formation in a subsequent cast because gas dissolution in metal.

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Investigation of dimension accuracy formation in casting patterns carried out by method of additive technologies for foundry

Буцанец¹,

Ольховик²,

Ol'khovik³

et al. 2016

Science Intensive Technologies in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

Studying wear-resistant coatings applied to samples of structural steel used for manufacturing shafts of hydrofoils

Petrov,

Fedosov,

Shoniia

et al. 2023

Vestnik of Astrakhan State Technical University. Series: Marine Engineering and Technologies

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Effective interaction of structural elements and materials from which they are made is one of the most important tasks in the design of parts and mechanisms of ship power plants. The operating experience of Meteor-type vessels has shown that the main cause of propeller shaft breakage and failure may be non-compliance with the technical requirements for the chemical-thermal processing of the shaft necks to the bearings size or poor-quality superficial coating. There has been made a comparative analysis of coating technologies, its results will significantly increase the cyclic wear resistance of the surface layer of the shaft necks of the hydrofoil ship shafting. The technologies of gas-plasma and gas-dynamic spraying, as well as electrospark alloying of the surface are considered. An instrumental assessment of the parameters of the applied protective coating quality is performed. Alloying materials for each of the methods of the surface hardening and modification are also presented. The scheme and design of the stand for testing the applied coatings for cyclic fatigue strength up to the moment of critical failure are given. The coatings deposited on the samples surfaces are studied to assess the surface microgeometry and microhardness. The samples are tested on the stand with a cyclic load at an induction motor shaft speed of 1800 rpm (30 rps). A bearing ball made of steel is used as an indenter. After testing, the focus of the coating destruction is assessed visually using a measuring and computing complex based on an optical microscope. As a result of the tests, it is revealed that the samples processed by the electrospark alloying method have the highest resistance to alternating cyclic effects, the lowest surface roughness and the highest microhardness.

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Generalized Model of the Quality Status of Surface Critical Parts of Ship Power Plants Made of Composite Plastics

Cited by 2 publications

References 0 publications

Investigation of dimension accuracy formation in casting patterns carried out by method of additive technologies for foundry

Investigation of dimension accuracy formation in casting patterns carried out by method of additive technologies for foundry

Studying wear-resistant coatings applied to samples of structural steel used for manufacturing shafts of hydrofoils

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