Tribological behavior of piston alloy reinforced by micro- and ultradispersed ceramic particles

Volochko, A. T.; Комаров, А. И.; Комарова, В. И.; Senyut, V. T.; Шипко, А. А.; Izobello, A. Yu.

doi:10.3103/s1068366611020127

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…Equal research is currently being carried out on the quality of reciprocating silumin products, including, for example, the improvement of the structure and properties of the material [10][11][12][13], impact of manufacturing technology on the properties of castings [14][15][16][17], evaluation of the dimensional stability of the product [18] or the tribological behavior of the piston alloy [19]. Despite attempts to improve the structure of properties of silumin castings, attention should also be paid to quality control of these castings [6,20].…”

Section: Piston Siluminsmentioning

confidence: 99%

Improving Quality Control of Siluminial Castings Used in the Automotive Industry

Czerwińska

Dwornicka²,

Pacana

2020

METAL Conference Proeedings

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The aim of the study is to identify the causes of non-compliance of castings and ultimately, using quality management tools (5W2H I diagram Ishikawa), to reduce or eliminate the number of such non-compliance. The research was carried out using visual, luminescence and metallographic tests and the product was a diesel engine piston casting. The study identified clusters of rows in the area of sealing canals and specified their cause -inadequate quality of the charge. So far, no analyses of quality problems using a sequential quality management methodology have been carried out in the company, so that the implemented corrective actions did not lead to the full achievement of quality objectives. The sequential method presented in the paper, combining diagnostic and control tests and quality management tools, is a universal way to monitor the quality level of products and to quickly correct any nonconformities. The presented method can be used in enterprises producing products from ferromagnetic, non-ferromagnetic and non-metallic materials (due to the effectiveness of the luminescence method).

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Section: Piston Siluminsmentioning

confidence: 99%

Improving Quality Control of Siluminial Castings Used in the Automotive Industry

Czerwińska

Dwornicka²,

Pacana

2020

METAL Conference Proeedings

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“…Из методов in-situ получения композитов наиболее известны российский САМ-процесс [13] и американский Primex (Dimox)-процесс [14], основанные на in-situ обработке, характеризующиеся полной смачиваемостью армирующей фазы матричным расплавом. В основе этих методов реакция протекает непосредственно в форме за счет самопроизвольного синтеза тугоплавких оксидов, карбидов, нитридов и т. д. в объеме металла.…”

unclassified

“…Получение достаточно мелких дисперсных фаз (нанометрических размеров) непосредственно в результате их синтеза в расплаве открывает путь стабилизации дисперсных систем при формировании конечного изделия. В Физико-техническом институте НАН Беларуси [13] опробован метод формирования нитридных фаз (сиалонов) в алюминиево-кремниевом сплаве путем обработки его атомарным азотом как продуктом разложения карбамида CH 4 N 2 O в составе алюминиевых лигатур. Карбамид способен выделять значительный объем газа (до 2,5 м 3 /кг).…”

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Aluminum composites based on high‑strength alloy B95 treated with activated dispersed particles

et al. 2022

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The paper presents the results of studies on the production of composites during the processing of aluminum melt based on high‑strength alloy B95 activated dispersed particles of nitrides (AlN, Si3N4, TiN), carbides (SiC, TiC), nanostructured carbon (fullerene carbon black), nitrogen‑containing components (glycine C2H5NO2, carbamide CH4N2O). The evaluation of the strength properties of the obtained composites from the activation modes of the charge with dispersed particles and the modes of heat treatment of the material is given. The possibility of increasing the strength characteristics of the casting composite by 15–20 % due to additional mechanical activation of the charge and achieving, after heat treatment, the compressive strength of 900–1050 MPa, hardness of 150–160 NV, elastic modulus of 20–25 GPa is shown.

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Production of alumo-matrix composite material modified by nanostructured cubic boron nitride

Vityaz

Senyut

Kheifetz

et al. 2018

Vescì Akademìì navuk Belarusì. Seryâ fizika-tehničnyh navuk

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The structure and microhardness of an aluminum alloy with additives of nanostructured cubic boron nitride (cBN) after treatment under high pressure and temperature are investigated. А nanostructured powder of cBN with primary particles within 50–200 nm is used as a filler. A preliminary chemical-thermal modifying of the nanostructured cBN, which consists in its high-temperature annealing in the temperature range of 750–950 °C in a medium of aluminum-contai ning compounds, is carried out to increase the chemical affinity of the nanostructured cBN to the aluminum matrix. It is shown that the modifying of nanostructured cBN with aluminum increases the strength of the additives retention in the aluminum matrix. At the same time the increase in the concentration of BN additives from 1.5 to 5 wt.% as well as the increase in the treatment temperature at a fixed pressure promotes the increase in the microhardness of the material by a factor of 1.5 to 2 as compared with the base aluminum alloy without the addition of a modifier. An increase in the cBN concentration to 5 % by weight results in an increase in the fraction of smaller particle conglomerates (1–5 μm) in the material and in a decrease in the size of large inclusions to 10–20 μm. In this case, the distribution of BN particles in the aluminum matrix is more uniform in comparison with a material with a cBN content of 1.5 wt.%. In the material with the growth of temperature up to 1000 °С, cBN in aggregates is recrystallized with the formation of single-crystal (polycrystalline) particles with the size of 1–10 μm with faceting specific for cBN micron particles.

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Tribological behavior of piston alloy reinforced by micro- and ultradispersed ceramic particles

Cited by 4 publications

References 2 publications

Improving Quality Control of Siluminial Castings Used in the Automotive Industry

Improving Quality Control of Siluminial Castings Used in the Automotive Industry

Aluminum composites based on high‑strength alloy B95 treated with activated dispersed particles

Production of alumo-matrix composite material modified by nanostructured cubic boron nitride

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