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Wyświetlanie 1-3 z 3
Tytuł:
Study of the thermally sprayed Zn coatings in the context of use in special purpose articles
Autorzy:
Bober, M.
Milczarek, R.
Żubrowski, M.
Sokołowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/115030.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
natryskiwanie płomieniowe
powłoka cynkowa
powłoka natryskiwana cieplnie
flame spraying
zinc coating
thermally sprayed coating
Opis:
The paper presents the results of operational tests of thermal sprayed zinc coatings of various thicknesses on non-alloy steel substrates. The resistance of coatings to: variable temperature cycles, increased ambient humidity, salt fog as well as the electrical resistance of the coating and its adhesion to the steel substrate were tested. It has been shown that Zn coatings has a high corrosion resistance in various atmospheric conditions and have satisfactory properties so they can be protective layers of machine parts used in the armaments industry.
Źródło:
Welding Technology Review; 2018, 90, 11; 3-7
0033-2364
2449-7959
Pojawia się w:
Welding Technology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Possibility to Improve Resistance of Cast-iron Hydraulic Valves to Cavitation Wear
Autorzy:
Orłowicz, A. W.
Tupaj, M.
Mróz, M.
Kupiec, B.
Jacek, M.
Radoń, M.
Powiązania:
https://bibliotekanauki.pl/articles/382203.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cast iron
hydraulic valve
cavitation wear
plasma sprayed coating
sealing ring
żeliwo
zawór hydrauliczny
zużycie kawitacyjne
powłoka natryskiwana plazmowo
pierścień uszczelniający
Opis:
A common problem encountered in hydraulic valves is a progressing deterioration of tightness of their water flow cutting-off seats. The seats are provided usually with a copper-alloy insert joined mechanically with cast-iron valve housing. The problem of unreliability of such joints can be solved by providing surface of the seat with a coating, deposited with the use of HVOF method and resistant to abrasive and cavitation wear. The tests were carried out for a sealing-draining seat insert made of CuZn39Pb2Al brass used to date and a specimen taken from the cast-iron valve housing which was the substrate for a plasma-sprayed coating of powder containing 86.1% Cr, 7.2% Ni, and 6.7% C. The coating, 345 ± 15 μm thick, was characterized with good quality of bonding with cast-iron substrate and high compactness of the material. The cavitation wear test on materials used in the study were carried out with the use of Vibra-Cell ultrasonic liquid processor (Sonics) equipped with a piezoelectric probe operating at the frequency of 20 kHz. Based on profilograms taken along a line crossing centers of cavitation craters, measurements of the height parameter Rt, and microscopic observations of surfaces it has been found that the coating plasma-sprayed onto substrate of nodular cast iron demonstrated higher resistance to cavitation compared to copper-alloy inserts used so far in cast-iron hydraulic valves. Cavitation craters on the material used typically for valve seats to date were more distinctly outlined and deeper compared to craters observed on the coating. Larger were also sizes of local tear-outs which resulted in larger difference between the peaks line and the valleys line.
Źródło:
Archives of Foundry Engineering; 2018, 18, 4; 31-34
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adhesion of the powder flame sprayed coatings using Fe-Cr-Co-Mo powder
Autorzy:
Rzeźnikiewicz, A.
Cetnarowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/115133.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
natryskiwanie płomieniowo-proszkowe
powłoka natryskiwana
siła przyczepności
modyfikacja powierzchni
powder flame spraying
spraying coating
adhesion strength
surface modification
Opis:
The aim of the research was to assess the adhesion of the powder flame sprayed coatings to the previously prepared substrate. The spraying tests were carried out using Rototec 51000 base powders which was Ni-Al-Mo alloys, then coated with an outer coating made of Rototec 19404, which is an alloy Fe-Cr-Co-Mo. The coatings were tested for adhesion in accordance with the PN-EN ISO 14916:2017 standard and also topography tests of sprayed coatings using scanning electron microscopy.
Źródło:
Welding Technology Review; 2018, 90, 11; 16-19
0033-2364
2449-7959
Pojawia się w:
Welding Technology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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