Temat: gas treatment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Application of Deep Cryogenic Treatment to Improve the Properties of Nitrided Layers Formed on X153CrMoV12 Steel
Autorzy:: Wach, P.
Ciski, A.
Babul, T.
Kapuścińska, A.
Oleszak, D.
Powiązania:: https://bibliotekanauki.pl/articles/355130.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: gas nitriding
nitride layers
cryogenic treatment
heat treatment
tribology
corrosion resistance
X153CrMoV12 steel
Opis:: Deep cryogenic treatment (DCT) is gaining popularity as a treatment used to modify structures obtained during heat or thermo-chemical treatment. The article presents the influence of DCT, carried out during heat treatment before and after gas nitriding processes, on the formation of gas nitrided layers on X153CrMoV12 steel. It was found that the use of DCT between quenching and tempering performed prior to gas nitriding processes, increases the hardness, thickness and wear resistance of the nitrided layers. At the same time, if we apply cryogenic treatment during post-heat treatment of nitrided layers, we also get very high wear resistance and increased thickness of nitrided layers, in comparison with conventional gas nitriding of X153CrMoV12 steel. In this case, DCT significantly increases also the hardness of the core by the transformation of retained austenite and the precipitation of fine carbides of alloying elements.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 1; 303-309
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of Atmospheric-Pressure Gas-Plasma Treatment on Surface Properties of Hot-Dip Zn-Mg-Al Alloy-Coated Steel
Autorzy:: Jeong, Chang-U
Kim, Jae-Hyeon
Park, Je-Shin
Kim, Min-Su
Kim, Sung-Jin
Oh, Min-Suk
Powiązania:: https://bibliotekanauki.pl/articles/2203736.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: plasma treatment
Zn-Mg-Al-galvanized steel
surface energy
process gas
Opis:: The effect of plasma-radical change on the surface properties of Zn-Mg-Al ternary-alloy-coated steel sheets during atmospheric-pressure (AP) plasma treatment using different process gases: O2, N2, and compressed air was investigated. The plasma-induced radicals promoted the formation of chemical particles on the surface of the Zn-Mg-Al coating, thereby increasing the surface roughness. The surface energy was calculated using the Owen-Wendt geometric equation. Contact angle measurements indicated that the surface free energy of the alloy sheets increased upon AP plasma treatment. The surface properties of the Zn-Mg-Al coating changed more significantly in the order air > O2 > N2 gas, indicating that the plasma radicals facilitated the carbonization and hydroxylation of the Mg and Al components during the AP plasma treatment.
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 1; 187--190
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Advantages of Melting Cast Iron in Gas Cupola Furnaces
Autorzy:: Grachev, V.
Powiązania:: https://bibliotekanauki.pl/articles/383345.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: innovative foundry technologies
innovative foundry materials
heat treatment
melting
gas cupola furnace
gas combustion mode
refractory filling
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
obróbka cieplna
topienie
Opis:: The author has developed and patented several types of gas cupola furnaces, which, due to replacing coke with gas, do not emit carbon monoxide, sulfur dioxide and coke dust. The author has defined the optimal modes of gas-and-air mixture combustion, i.e. the optimal coefficient of air discharge and gas mixture escape speed in melting cast iron. It has been experimentally proved that from the point of view of obtaining the maximum temperature, the optimal was the process with some lack of air, i.e. with α = 0.98. The results of metallurgical studies used in the article allowed to develop an optimal structure of the gas cupola furnace with a heterogeneous refractory filling, and to establish the optimal composition of the filling. For the first time the optimal composition of the filling is given: 40% of chamotte, 30% of high-alumina refractory, 30% of electrode scrap. It has been noted that when gas cupola furnaces were used, the main environmental advantage was the reduction of dust emission into the atmosphere, CO and SO2 content.
Źródło:: Archives of Foundry Engineering; 2018, 18, 3; 76-80
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Surfacing 24Cr-5Ni-2.5Mo Duplex Steel Castings by TIG
Autorzy:: Kasinska, J.
Skrzypczyk, A.
Kalandyk, B.
Powiązania:: https://bibliotekanauki.pl/articles/379970.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: duplex cast steel
surfacing
Tungsten Inert Gas method
solution heat treatment
microstructure change
staliwo duplex
proces napawania
metoda TIG
obróbka cieplna
Opis:: This article discusses the influence of Tungsten Inert Gas (TIG) surfacing of duplex cast steel on its hardness and structure. The samples of 24Cr-5Ni-2.5Mo ferritic-austenitic cast steel were subjected to single-overlay processes with the use of solid wire having the chemical composition similar to that of the duplex cast steel. As a result of the surfacing, the welds were obtained that had no welding imperfections with a smooth transition to the base material. In the test without the heat treatment, directly below the fusion line, we observe a ferrite band with a width of approximately 200 μm without visible austenite areas. Some of the samples were then solution treated (1060°C). Both variants, without and after solution heat treatment, were subjected to testing. Significant changes in the microstructure of the joint were observed after the heat treatment process (heat affected zone and weld microstructure changes). In both areas, an increase in the austenite volume fraction after solution heat treatment was observed. Changes in the microhardness of the ferrite in the HAZ area directly below the fusion line were also observed.
Źródło:: Archives of Foundry Engineering; 2018, 18, 2; 15-20
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Cosmetic wastewater treatment using dissolved air flotation
Oczyszczenie ścieków kosmetycznych z wykorzystaniem procesu flotacji ciśnieniowej
Autorzy:: Bogacki, J. P.
Marcinowski, P.
Naumczyk, J.
Wiliński, P.
Powiązania:: https://bibliotekanauki.pl/articles/205185.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: wastewater treatment
GC-MS
gas chromatography
cosmetic wastewater
dissolved air flotation
PPCPs
pharmaceutical and personal care pollutants
oczyszczanie ścieków
chromatografia gazowa
ścieki kosmetyczne
flotacja ciśnieniowa
Opis:: Five cosmetics wastewater samples were treated by Dissolved Air Flotation (DAF) assisted by coagulation. Different aluminum based coagulants were used: (Al₂(SO₄)₃, Al 1019, Al 3010, Al 3030, Al 3035, PAX 16 and PAX 19). The raw wastewater COD values were in the range 285–2124 mg/l. The efficiency of DAF depended on different coagulants and production profile of factory. COD removal was varied from 11.1 to 77.7%. The efficiency of coagulants was similar during treatment of particular sample. The best results were obtained with Al₂(SO₄)₃ and for sample 5 – lotions and shampoos production. The wastewater from UV filter creams production (sample 4) was resistant to treatment by DAF regardless of used coagulant. HS-SPME-GC-MS analysis can be a confirmation of DAF effectiveness.
Pięć próbek ścieków kosmetycznych zostało poddanych oczyszczaniu z wykorzystaniem flotacji ciśnieniowej wspomaganej koagulacją. Stosowano różne koagulanty na bazie glinu: Al₂(SO₄)₃, Al 1019, Al 3010, Al 3030, Al 3035, PAX 16 and PAX 19. Wartość ChZT ścieków surowych była w zakresie 285–2124 mg/l. Skuteczność procesu flotacji ciśnieniowej była zależna od zastosowanego koagulantu i profilu produkcji fabryki kosmetyków. Skuteczność usunięcia wartości ChZT była w przedziale 11,1–77,7%. Skuteczność wszystkich koagulantów podczas oczyszczania każdej z próbek ścieków była podobna. Najlepsze rezultaty uzyskano z wykorzystaniem koagulantu Al₂(SO₄)₃ , dla próbki 5 – ścieki pochodzące z produkcji szamponów i logionów. Ścieki z produkcji kremów z filtrem UV (próbka 4) były oporne na oczyszczanie za pomocą procesu flotacji ciśnieniowej, niezależnie od zastosowanego koagulantu. Zastosowana analiza HS-SPME-GC-MS potwierdziła skuteczność oczyszczania z wykorzystaniem flotacji ciśnieniowej.
Źródło:: Archives of Environmental Protection; 2017, 43, 2; 65-73
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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