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Wyświetlanie 1-15 z 22
Tytuł:
Assessing visible radiation threat at soldering work stations
Autorzy:
Pawlak, A.
Powiązania:
https://bibliotekanauki.pl/articles/360395.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
blue light hazard
electrical welding
gas welding
occupational risk
Opis:
The article discusses criteria for the assessment of exposure to visible radiation (blue light), methods of measurement of radiation exposure and hazards during welding. Then, the author presents the results of measurements of exposure to visible radiation in the electrical and gas welding. Based on the results of these measurements the occupational risk for the studied positions has been determined.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 35 (107); 118-124
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ispolzovanie vodorodo-kislorodnojj smesi dlja gazovojj svarki
The use of hydrogen-oxygen mixture for gas welding
Autorzy:
Polyakov, A.
Powiązania:
https://bibliotekanauki.pl/articles/76749.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
welding process
gas mixture
hydrogen-oxygen mixture
gas welding
moisture content
drainage
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 4
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of GTAW Process Parameters of Dissimilar Al-Mg Alloys for Enhanced Joint Strength - Taguchi Approach
Autorzy:
Antony Prabu, D.
Jayakumar, K.S.
Madhavan Pillai, Elangovan
Kumaresan, G.
Powiązania:
https://bibliotekanauki.pl/articles/27765105.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
AA5052-H32
AA5083-H111
mechanical properties
microstructures
optimization
tungsten inert gas welding
Opis:
The Tungsten Inert Gas (TIG) welding processes one of the prevalent methods used for welding aluminum alloys. TIG welding is most commonly used due to its superiority in welding less dense materials. The most prevalent issues encountered with TIG welding aluminium alloys are porosity creation and cracking due to solidification, both of which result in lower mechanical properties. Because of the metal’s susceptibility to heat input, this occurs. The current work is the result of a desire to improve the mechanical properties of dissimilar aluminium metals: AA5052-H32 & AA5083-H111. The process parameters of TIG welding are optimized towards eliminating the previously discussed failure scenarios. Various optimization techniques exist towards obtaining optimizing processes such as Response Surface Methodology (RSM), Genetic Algorithm (GA), Artificial Neutral Network (ANN), Flower pollination algorithm, Taguchi method etc, The Taguchi method was chosen for the optimization of process parameters due to its inherent nature of solving problems of singular variance. The optimal parameters combination was determined i.e. welding current at 170 A, filler rod diameter 2.4 mm and Gas flow rate of 11 lpm. The optimized input parameter was used to TIG weld the confirmation specimen which are further investigated for mechanical and metallurgical characterizations. The parameters were optimized and the results indicate that the input current was found to be the most contributing towards improving mechanical properties over all the process parameters.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 599--606
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of shielding gas on mechanical, metallurgical and corrosion properties of corten steel welded joints of Railway Coaches using GMAW
Autorzy:
John, B.
Paulraj, S.
Mathew, J.
Powiązania:
https://bibliotekanauki.pl/articles/103206.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
gas metal arc welding
shielding gas
corrosion
weld microstructure
corten steel
Opis:
This analysis lays emphasis on finding a suitable combination of shielding gas for welding underframe members such as sole bar of Railway Coaches made of corten steel; for improved mechanical, metallurgical and corrosion properties of welds using copper coated solid MIG/MAG welding filler wire size 1.2 mm conforming to AWS/SFA 5.18 ER 70 S in Semi-automatic GMAW process. Solid filler wire is preferred by welders due to less fumes, practically no slag and easy manipulation of welding torch with smooth wire flow during corrosion repair attention, when compared to Flux cored wire. Three joints using Gas metal arc welding (GMAW) with shielding gases viz., Pure CO2, (80% Ar – 20% CO2 ) and (90% Ar – 10% CO2 ) were made from test pieces cut from Sole bar material of Railway Coach. Study of Mechanical properties such as tensile strength, hardness and toughness revealed that welded joint made using shielding gas (80% Ar – 20% CO2 ) has better Mechanical properties compared to the other two shielding gases and comparable to that of Parent metal. Type of Shielding gas used has influence on the chemical composition and macro & micro structures. The Tafel extrapolation study of freshly ground samples in 3.5% NaCl solution revealed that the welded joint made using shielding gas (80% Ar – 20% CO2 ) has also better corrosion resistance which is comparable to the Parent metal as well as similar commercial steels.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 32; 156-168
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Welding and Corrosion Behavior of AISI H13 Welds: The Effect of Filler Metal on the Microstructural Evolutions
Autorzy:
Varmaziar, Sadegh
Mostaan, Hossein
Rafiei, Mahdi
Yeganeh, Mahdi
Powiązania:
https://bibliotekanauki.pl/articles/2049365.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AISI H13 tool steel
gas tungsten arc welding
filler metal
corrosion
microstructure
Opis:
Welding of AISI H13 tool steel which is mainly used in mold making is difficult due to the some alloying elements and it high hardenability. The effect filler metal composition on the microstructural changes, phase evolutions, and hardness during gas tungsten arc welding of AISI H13 hot work tool steel was investigated. Corrosion resistance of each weld was studied. For this purpose, four filler metals i.e. ER 312, ER NiCrMo-3, ER 80S, and 18Ni maraging steel were supplied. Potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS) were used to study the corrosion behavior of weldments. It was found the ER 80S weld showed the highest hardness owing to fully martensitic microstructure. The hardness in ER 312 and ER NiCrMo3 weld metals was noticeably lower than that of the other weld metals in which the microstructures mainly consisted of austenite phase. The results showed that the corrosion rate of ER 312 weld metal was lower than that other weld metals which is due to the high chromium content in this weld metal. The corrosion rate of ER NiCrMo-3 was lower than that of 18Ni maraging weld. The obtained results from EIS tests confirm the findings of potentiodynamic polarization tests.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 839-846
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transient finite element simulation and microstructure evolution of AA2219 weld joint using gas tungsten arc welding process
Autorzy:
Arunkumar, S.
Shrikrishna, A. K.
Paulraj, S.
Devakumaran, K.
Kumar, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/101882.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
AA2219 aluminium alloy
gas tungsten arc welding
finite element simulation
metallurgical characterization
Opis:
In this study we focus on finite element simulation of gas tungsten arc welding (GTAW) of AA2219 aluminum alloy and the behavioral of the microstructure before and after weld. The simulations were performed using commercial COMSOL Multiphysics software. The thermal history of the weld region was studied by initially developed mathematical model. A sweep type meshing was used and transient analysis was performed for one welding cycle. The highest temperature noted was 3568 °C during welding. The welding operation was performed on 200×100×25 mm plates. Through metallurgical characterization, it was observed that a fair copper rich cellular (CRC) network existed in the weld region. A small amount of intermetallic compounds like Al2Cu is observed through the XRD pattern.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 31; 64-73
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating the thermal and structural responses in hard-facing application with the GTAW process
Autorzy:
Savaş, Atilla
Powiązania:
https://bibliotekanauki.pl/articles/1839673.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
hard-facing
moving heat source
two-way coupling
gas tungsten arc welding (GTAW)
FEM
Opis:
The gas tungsten arc welding (GTAW) process is an excellent way of performing quality hard- -facing applications. The residual stresses and distortions are encountered in hard-facing. There are several methods to decrease residual stresses. Changing the welding pattern, changing thickness and preheating can be mentioned for this purpose. In this work, the influence of the welding pattern, plate thickness and preheating was investigated. The temperature distribution with the same welding conditions was used for validation of the numerical model. The total deformation in a 2mm plate was 15 times higher than in a 6mm plate with the same welding conditions.
Źródło:
Journal of Theoretical and Applied Mechanics; 2021, 59, 3; 343-353
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface Treatment Proposals for the Automotive Industry by the Example of 316L Steel
Autorzy:
Dudek, A
Lisiecka, B.
Powiązania:
https://bibliotekanauki.pl/articles/2065013.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
surface layer remelting
alloying
316L steel
Cr3C2 coating
gas tungsten arc welding
GTAW
Opis:
Nowadays, stainless steels are very interesting and promising materials with unique properties. They are characterized high mechanical strengths, high toughness and good corrosion resistance, so that can be used in many industrial sectors. An interesting alternative to steels obtained using the conventional methods is sintered stainless steel manufactured using the powder metallurgy technology. AISI 316L stainless steel is one of the best-known and widely used austenitic stainless steel. Modification of surface properties of stainless steels, in particular by applying the Cr3C2 coating is becoming more and more popular. The technique of atmospheric plasma spraying (APS) was used to deposit Cr3C2 - NiAl powder on stainless steel surface. In this study presents arc surface remelting of two types of stainless steel was used by GTAW method in order to improve function and usability these materials. The results of optical microscope metallographic, hardness and scratch test are presented. The main assumption for this study was to analyze the microstructure and hardness after remelting and alloying the surface of 316L steel (using GTAW method) with current intensity 50 A.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 369--376
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innowacyjne procesy spawania w przemyśle motoryzacyjnym
Innovative processes of welding in the automotive industry
Autorzy:
Pałubicki, S.
Powiązania:
https://bibliotekanauki.pl/articles/316973.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
spawanie łukowe w osłonie gazów
metoda niskoenergetyczna
jakość złącza
gas shielded arc welding
low energy process
joint quality
Opis:
Niniejszy artykuł przedstawia zagadnienia związane z zastosowaniem niskoenergetycznych metod spawania łukowego do łączenia elementów cieńkościennych w przemyśle motoryzacyjnym. Metody te pozwalają na spawanie w sposób szybki a zarazem kontrolowany elementów cienkościennych oraz materiałów szczególnie wrażliwych na wpływ ciepła dostarczonego w procesie spawania.
This article explains the use of low-energy methods of arc welding for joining thin-walled components in the automotive industry. These methods allow the welding in a rapid yet controlled thin-walled components and materials sensitive to the influence of the heat supplied during the welding process.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 7-8; 389-394
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Partially Melted Zone in Mg-Al Type Alloy After Gas-tungsten Arc Welding
Autorzy:
Braszczyńska-Malik, K. N.
Przełożyńska, E.
Mróz, M.
Powiązania:
https://bibliotekanauki.pl/articles/381760.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mg-Al-Zn alloy
gas tungsten arc welding
partially melted zone
stop Mg-Al-Zn
spawanie łukowe
strefa przetopienia
Opis:
The gas-tungsten arc (GTA) welding behaviors of the commercial AZ91 magnesium alloy were examined in terms of microstructure characteristics. This study focused on the effects of the GTAW process parameters (like welding current, welding speed and method of additional cooling of the welded samples) on the size of the fusion zone (FZ) and partially melted zone (PMZ). The PMZ morphology of the eutectic regions changed from less to more divorced in the direction from the FZ to the base metal. The largest PMZ was obtained at a low welding speed (3.33 mm/s) and without additional water cooling of the samples.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 18-21
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Groove shape on the Mechanical Properties of Welded Commercial Steel
Autorzy:
Elfallah, Saleh
Powiązania:
https://bibliotekanauki.pl/articles/27323132.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
spawanie w osłonach gazowych
łuk wolframowy
stal komercyjna
wytrzymałość na rozciąganie
twardość
projekt Taguchi
gas tungsten arc welding
commercial steel
tensile strength
hardness
Taguchi design
Opis:
Manufacturers always seek for quality and effective welding to stay competitive in the market. There is a continuous demand for a quick and efficient manufacturing set ups for new products. GMAW is among the welding processes that is wieldy used in the industry. Welding factors such as welding voltage, welding current, gas flow rate, filler wire size and welding speed play a significant role in determining the welding quality. Taguchi design uses optimization technique for the process of experimentation as an effort to improve productivity and enhance product quality. This study discusses the welding of commercial steel welded using GMAW. The welding was controlled by welding current, welding speed and groove shape to test their influence on the welding strength, tensile strength and hardness. X groove shape welding has obtained lower tensile strength and hardness than V groove shape as did higher welding current and lower welding speed. The results concluded that welding current welding had the highest influence on tensile strength and hardness of the welding, followed by groove shape, while the welding speed had the minimum influence. The optimized combination of welding factors is 170 A, V groove shape and 150 mm/min.
Źródło:
Welding Technology Review; 2023, 95; 49--56
0033-2364
2449-7959
Pojawia się w:
Welding Technology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure of MMCs with SiC Particles after Gas-tungsten Arc Welding
Autorzy:
Przełożyńska, E.
Braszczyńska-Malik, K. N.
Mróz, M.
Powiązania:
https://bibliotekanauki.pl/articles/379546.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium matrix composite
gas tungsten arc welding
Mg-Al-Mn alloy
SiC particle
microstructure
kompozyt magnezowy
spawanie łukowe
stop Mg-Al-Mn
cząstka SiC
mikrostruktura
Opis:
The gas-tungsten arc (GTA) welding behaviors of a magnesium matrix composite reinforced with SiC particles were examined in terms of microstructure characteristics and process efficiencies. This study focused on the effects of the GTAW process parameters (like welding current in the range of 100/200 A) on the size of the fusion zone (FZ). The analyses revealed the strong influence of the GTA welding process on the width and depth of the fusion zone and also on the refinement of the microstructure in the fusion zone. Additionally, the results of dendrite arm size (DAS) measurements were presented.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4; 65-68
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Funkcjonalność zgrzewarek jako jeden z czynników decydujących o jakości połączeń zgrzewanych rur i kształtek z polietylenu
The functionality of a welding machine, as one of the factors determining the quality of welded polyethylene pipes and fittings
Autorzy:
Wróblewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/1835331.pdf
Data publikacji:
2017
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
gazociąg
rury polietylenowe
zgrzewanie
gas pipeline
polyethylene pipes
welding
Opis:
Na podstawie dostępnej literatury, obowiązujących aktów normatywnych i instrukcji oraz własnych doświadczeń zostały opracowane wytyczne do oceny funkcjonalności zgrzewarek doczołowych i elektrooporowych stosowanych do łączenia rur i kształtek z tworzyw sztucznych. Jednolite wytyczne mogą przyczynić się do poprawy jakości połączeń zgrzewanych, a tym samym do zwiększenia niezawodności pracy sieci gazowych.
On the basis of the available literature, normative acts, instructions and own experiences, guidelines have been developed to assess the functionality of butt and electrofusion welding used to connect plastic pipes. Uniform guidelines can help to improve the quality of welded joints and thus increase the reliability of gas networks.
Źródło:
Nafta-Gaz; 2017, 73, 12; 953-957
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zgrzewanie elektrooporowe gazociągów polietylenowych w ujemnych temperaturach otoczenia
Electrofusion welding of polyethylene gas pipelines in sub-zero temperatures
Autorzy:
Wróblewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/1835248.pdf
Data publikacji:
2018
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
gazociąg
rury polietylenowe
zgrzewanie elektrooporowe nagrzewanie wstępne
gas pipeline
polyethylene pipes
electrofusion welding
preheating
Opis:
W artykule opisano metodykę zgrzewania elektrooporowego w ujemnych temperaturach otoczenia, polegającą na ustaleniu parametrów wstępnego nagrzewania poprzez zastosowanie obniżonego napięcia zgrzewania w określonym czasie. Celem tego działania było uzyskanie dodatniej temperatury kształtki i rury, tak aby można było rozpocząć właściwy proces zgrzewania. Opracowaną metodykę zweryfikowano doświadczalnie.
The paper describes the developed method of electrofusion welding in sub-zero ambient temperatures, consisting of the setting of preheating parameters taken by applying a reduced welding voltage at a given time. This process was supposed to cause positive temperature of the fitting and the pipe so that the proper welding process could be started. The developed methodology was verified experimentally.
Źródło:
Nafta-Gaz; 2018, 74, 7; 552-559
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Shielding Gas Composition on Geometry and Austenite Formation in Low Power Pulsed Nd:YAG Laser Welded 2205 Duplex Stainless Steel
Autorzy:
Gozarganji, Hajibaba, E.
Farnia, A.
Ebrahimnia, M.
Powiązania:
https://bibliotekanauki.pl/articles/2049428.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
low power pulsed Nd:YAG laser welding
duplex stainless steel
shielding gas
nitrogen
austenite formation
Opis:
This paper presents an investigation into effect of nitrogen content of shielding gas mixture on weld geometry, microstructure and hardness of pulsed laser welded 2205 duplex stainless steel. Full penetration autogenous welding was performed on 2 mm thick plates using a low power pulsed Nd: YAG laser. light and scanning electron microscopy were used to study the resulting microstructures. It is observed that 2 mm full penetrated joint decreases to 1.8 mm by dominating nitrogen in argon-nitrogen mixture. Different morphologies of austenite phase as well as an increase of 8% of its content can be observed in pure nitrogen shielded welds. Average weld grain size in sample which is welded in nitrogen atmosphere stands at approximately 41 μm which is smallerthan that of argon atmosphere which is about 51 μm. Micro-hardness test reveals that hardness values increase from 280 HV in base metal to 307 HV in weld center line and the shielding gas mixture does not significantly influence the weld hardness.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 187-195
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 22

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