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Wyszukujesz frazę "steel welding" wg kryterium: Temat


Wyświetlanie 1-8 z 8
Tytuł:
Resistance Welding of High-Manganese Cast Steel with Unalloyed Steel Rails
Autorzy:
Tasak, E.
Ziewiec, A.
Tuz, L.
Powiązania:
https://bibliotekanauki.pl/articles/380090.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
crossovers welding
hadfield cast steel
austenite spacer
dissimilar metals welding
zwrotnica
spawanie
staliwo
austenit
Opis:
The paper presents the influence of resistance welding parameters on the mechanical properties and structure of joints of the unalloyed steel rail and high-manganese crossover. As the spacer Cr-Ni austenitic cast steel with decreased austenite stability was used. The results show, that the austenitic cast steel with metastable structure of austenite provide to high strain hardening of spacer deformation during operation. The high increase of hardness is the result dislocation hardening and the transition of austenite into martensite. The content of ferrite &delta and martensite was measured by metallographic method and verified by X-ray diffraction phase analysis. Moreover, it was shown that to high welding parameters causes the cracks in HAZ of manganese iron cast and in the spacer near to fusion line with unalloyed cast steel. The reparation of cracks can be made by welding methods.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 115-120
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Repair of Foundry Defects in Steel Castings Using Welding Technology
Autorzy:
Mičian, M.
Koňár, R.
Hlavatý, I.
Winczek, J.
Gucwa, M.
Powiązania:
https://bibliotekanauki.pl/articles/380199.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steel casting
repair by welding
mechanical testing
approval of welding procedure
odlew staliwny
spawanie naprawcze
badania mechaniczne
Opis:
Use of welding technology for the repair of steel castings is particularly common in two areas. These include weld surfacing of protrusions that remained incomplete after casting, or filling the surface defects (cavities). These defects are more common for steel casting than for graphite cast iron, due to the lower fluidity of steel. This article describes a suitable technological process of repairing the defects on the casting using the welding technology. A specimen produced for this purpose was prepared by carving a groove into a cast steel plate 20 GL, which was then filled with a weld metal using MAG (135) technology. The following evaluation of the basic characteristics of the repaired site point to the suitability of the selected technological parameters of the repair procedure. Metallographic evaluation was carried out, further evaluation of mechanical properties by tensile test, bend test and Vickers hardness test. The proposed methodology for the evaluation repair of foundry defects in steel castings also meets the requirements for the approval of welding procedures in accordance with the relevant valid legislation.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 177-180
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Content of δ Ferrite in Pulse-Arc Welded Steel 304
Autorzy:
Gucwa, M.
Bęczkowski, R.
Grzyb, A.
Powiązania:
https://bibliotekanauki.pl/articles/380266.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stainless steel
ferrite
welding arc
Schaeffler diagram
stal nierdzewna
ferryt
spawanie
diagram Schaefflera
Opis:
The paper presents the results of research on the effect of the welding arc type on the content of δ ferrite, in the welded joint of 304 grade stainless steel. Based on the commonly used Schaefler diagram, the content of δ ferrite in the welded joint was estimated, and then these results were verified by comparing them with results obtained on specimens welded by different welding arc types, including the pulse arc. The obtained investigation results indicate some discrepancies between calculations made by analytical methods and the fraction of δ ferrite measured on the prepared specimens.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 131-134
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wear Resistance of Steel 20MnCr5 After Surfacing with Micro-jet Cooling
Autorzy:
Tarasiuk, W.
Piwnik, J.
Węgrzyn, T.
Sieteski, D.
Powiązania:
https://bibliotekanauki.pl/articles/380473.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tribological properties
welding
micro-jet
steel 20MnCr5
właściwości tribologiczne
spawanie
mikrojety
stal 20MnCr5
Opis:
This paper presents results of experimental research concerning the impact of an innovative method of micro-jet cooling on the padding weld performed with MIG welding. Micro-jet cooling is a novel method patented in 2011. It enables to steer the parameters of weld cooling in a precise manner. In addition, various elements which may e.g. enhance hardness or alter tribological properties can be entered into its top surface, depending on the applied cooling gas. The material under study was steel 20MnCr5, which was subject to the welding process with micro-jet cooling and without cooling. Nitrogen was used as a cooling gas. The main parameter of weld assessment was wear intensity. The tests were conducted in a tribological pin-on-disc type position. The following results exhibit growth at approximately 5% in wear resistance of padding welds with micro-jet cooling.
Źródło:
Archives of Foundry Engineering; 2016, 16, 3; 121-124
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Micro-jet Cooling by Compressed Air after MAG Welding
Autorzy:
Węgrzyn, T.
Piwnik, J.
Tarasiuk, W.
Stanik, Z.
Gabrylewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/381574.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
MAG
steel weld
welding
microjets
cooling
acicular ferrite
impact toughness
compressed air
stal stopowa
spawanie
udarność
chłodzenie
Opis:
The material selected for this investigation was low alloy steel weld metal deposit (WMD) after MAG welding with micro-jet cooling. The present investigation was aimed as the following tasks: analyze impact toughness of WMD in terms of micro-jet cooling parameters. Weld metal deposit (WMD) was first time carried out for MAG welding with micro-jet cooling of compressed air and gas mixture of argon and air. Until that moment only argon, helium and nitrogen and its gas mixture were tested for micro-jet cooling.
Źródło:
Archives of Foundry Engineering; 2016, 16, 2; 111-114
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 Flame Welding Method by Spraying Pure Iron Powder
Autorzy:
Keyhany, P.
Vahdat, S. E.
Powiązania:
https://bibliotekanauki.pl/articles/381026.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
structural steel
repair
welding
tensile strength
mechanical properties
oxyacetylene
reducing flame
konstrukcje stalowe
naprawa
spawanie
wytrzymałość na rozciąganie
własności mechaniczne
Opis:
To improve mechanical properties and increasing useful life of metal pieces, different methods of welding are used for repairing surface crack of metal pieces. In this research, performance of flame welding method by spraying pure iron powder evaluated for repairing surface grooves of structural steel. First, four specimens including one control specimen and other three specimens grooved specimens in depth of 1mm and in length of 12.5mm and groove width in the sizes of 0.5, 0.75 and 1mm.were prepared then, powder melted using oxyacetylene reducing flame and spraying iron powder in the flame path and attached to the inner surface of the groove and finally, the specimen repaired. Results showed that after repairing surface groove, tensile strength of the repaired specimens were reached to the tensile strength of control specimen with the margin of 2.5%.
Źródło:
Archives of Foundry Engineering; 2016, 16, 3; 167-171
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:
The quality of welded connections elements from the steel 30HGS and titanium alloy Ti6Al4V
Autorzy:
Łapiński, Z.
Dziedzic, A.
Bochnowski, W.
Adamiak, S.
Sandomierski, S.
Powiązania:
https://bibliotekanauki.pl/articles/382853.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
obróbka cieplna
metalografia
mikrotwardość
spawanie
stop tytanu Ti-6Al-4V
stal 30HGS
heat treatment
metallography
factography
microhardness
welding
head weld
titanium alloy Ti-6Al-4V
steel 30HGS
Opis:
The aim of that work was the evaluation of the quality of welded connections elements (welds) from the 30HGS steel and titanium alloy Ti6Al4V. The metallographic, factographic tests were used, and measurements of microhardness with the Vickers method. In the head weld of the 30HGS steel there were non-metallic partial division and bubbles observed. The average microhardness in the head connection was 320 HV0.1. There was no significant increase/decrease observed of microhardness in the head influence zone of the weld. There was a good condition of head connections observed, in accordance with the standard EN12517 and EN25817. In the head weld of Ti6Al4V titanium alloy there were single, occasional non-metallic interjections and bubbles observed. There were no cracks both on the weld, and on the border of the heat influence zone. The value of microhardness in head connection was in the range 300-445 HV0.1. Reveal a very good condition of the head connections in accordance with the standard EN12517 and EN25817. The factographic tests prove the correctness of welded connections done and then heat treatment in case of steel and titanium alloy.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 159-166
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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