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Wyszukujesz frazę "surface diffusion" wg kryterium: Wszystkie pola


Wyświetlanie 1-4 z 4
Tytuł:
The studies of scale surface produced on outer diffusion layers
Autorzy:
Augustyn-Pieniążek, J.
Zapała, R.
Powiązania:
https://bibliotekanauki.pl/articles/379615.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
diffusion aluminising
high temperature corrosion
scale morphology
dyfuzja aluminiowa
korozja wysokotemperaturowa
morfologia zgorzeliny
Opis:
In this study at attempt was made to examine the scale formed on ferritic-austenitic duplex type steel subjected to previous thermo-chemical treatment. The treatment consisted in diffusion aluminising in a metallising mixture composed of Fe-Al powder. As an activator, ammonium chloride (NH4Cl) added in an amount of 2 wt.% was used. Then, both the base material and samples with the diffusion-deposited surface layers were oxidised at 1000°C in the air. Thus formed scales were identified by light microscopy, SEM and X-ray phase analysis. The aim of the oxidation tests carried out under isothermal conditions was to compare the scale morphology when obtained on untreated substrate material and on the surface layers rich in aluminium.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Repair of Structural Steel Surface Groove by Using Diffusion Welding of Pure Iron Powder
Autorzy:
Rahimy, Y.
Vahdat, S. E.
Powiązania:
https://bibliotekanauki.pl/articles/380060.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tensile strength
useful life
steel surface cracks
diffusion welding
repair
magnetic induction
wytrzymałość na rozciąganie
użytkowanie
pęknięcia powierzchni
naprawa
zgrzewanie dyfuzyjne
Opis:
Metal pieces wear out due to variable loading, because cracks formed on their surface of them. In order to increase useful life of metal pieces with the help of different methods of welding, surface cracks are repaired. In this research, performance of the diffusion welding of pure iron powder through magnetic induction evaluated for repairing structural steel surface cracks. First, four specimens prepared including one control specimen and other three specimens grooved specimens in length of 6.25mm and in depth of 1mm and groove width in the sizes of 0.5, 0.75 and 1mm. Then by a coil, the induced current created in the piece surface. After crossing the current, the powder melted and the groove repaired due to diffusion welding. To prevent oxidation, the atmosphere inside the coil filled with argon gas. The results show that after repairing surface groove, tensile strength of the repaired specimens reached to the tensile strength of control specimen with the margin of 7.5%
Źródło:
Archives of Foundry Engineering; 2016, 16, 2; 105-110
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diffusion Coefficient in the Zinc Coating Shaped on the Surface of Cast Iron and Steel Alloys
Autorzy:
Kopyciński, D.
Guzik, E.
Szczęsny, A.
Siekaniec, D.
Powiązania:
https://bibliotekanauki.pl/articles/379933.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hot-dip galvanizing
intermetallic sublayer
diffusion coefficient
cynkowanie zanurzeniowe
podwarstwa międzymetaliczna
współczynnik dyfuzji
Opis:
The article presents the method to assess the diffusion coefficient D in the sub-layer of intermetallic phases formed during hot-dip galvanizing “Armco” iron and ductile cast iron EN-GJS-500-7. Hot-dip galvanizing is one of the most popular forms of long-term protection of Fe-C alloys against corrosion. The process for producing a protective layer of sufficient quality is closely related to diffusion of atoms of zinc and iron. The simulation consist in performed a hot-dip galvanizing in laboratory condition above Fe-C alloys, in the Department of Engineering of Cast Alloys and Composites. Galvanizing time ranged from 15 to 300 seconds. Then metallographic specimens were prepared, intermetallic layers were measured and diffusion coefficient (D) were calculated. It was found that the diffusion coefficient obtained during hot-dip galvanizing “Armco” iron and zinc is about two orders of magnitude less than the coefficient obtained on ductile cast iron EN-GJS-500-7.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2; 43-46
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the hardener type on the sulfur diffusion from moulding sand to the casting surface
Autorzy:
Hosadyna, M.
Dobosz, S. M.
Major-Gabryś, K.
Powiązania:
https://bibliotekanauki.pl/articles/381690.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
moulding sand
sulphur diffusion
nodular cast iron
masa formierska
dyfuzja siarki
żeliwo sferoidalne
Opis:
The article is discussing authors examinations concerning the influence of the sulphur diffusion from moulding sand on reduction the efficiency of modifier elements in the process of making the nodular cast iron. In case of magnesium decrease of its content is observe, as a result of forming the magnesium sulphide. In consequence the participation of magnesium is falling below the concentration essential to create a spheroid graphite. The source of sulphur in no-bake sand with resin modified by furfuryl alcohol is a hardener, on the basis of sulphonic acids and sulphuric acid. Described examinations relate to no-bake sands made on the warp of fresh quartz sand.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 87-92
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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