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Featured researches published by T. Węgrzyn.


Materials Science Forum | 2010

Oxide Inclusions in Steel Welds of Car Body

T. Węgrzyn; J. Mirosławski; Abílio P. Silva; Deesy G. Pinto; M. Miros

The goal of this research is to choose the proper method of car body welding. Properties of weld metal deposits depend on many conditions. First of all, this paper attempts to study the role of oxide inclusion sites on the transformation of austenite to acicular ferrite in steel weld metal deposits and their toughness. Safety and exploitation conditions of welded steel structure depend on many factors. The most significant of those factors are connected with materials, welding technology, state of stress and temperature. Because of that a good selection of steel and welding method is crucial to obtain proper steel structure. Car body elements of higher durability are made of low carbon and low alloy steel, very often with small amount of carbon and the amount of alloy elements such as Ni, Mn, Mo, Cr and V in low alloy steel and their welds. In the terms of the kind of steel it is used a proper welding method and adequate filler materials. In the present paper the influence of Mn, Ni, Mo, in WMD on the behaviour of steel structure for low temperature service was tested.


Welding International | 2009

Non-metallic inclusions in the weld metal deposit of shielded electrodes used for welding of low-carbon and low-alloy steel

T. Węgrzyn; Romuald Szopa; Michał Miros

This paper discusses the relationship between the concentration of oxygen in the weld metal deposit – produced with basic- and rutile-shielded electrodes – and the size of non-metallic inclusions. Furthermore, this paper presents a mathematical formula that allows one to calculate the diameter of non-metallic inclusion in the metal weld deposit depending on the concentration of oxygen in MWD.


Scientific Papers of Silesian University of Technology. Organization and Management Series | 2018

Logistics in the management of municipal waste

Bożena Szczucka-Lasota; Politechnika Śląska Wydział Transportu; Radosław Wolniak; T. Węgrzyn; Wydział Organizacji i Zarządzania

The article describes the system of municipal waste management. The logistic processes, collection and disposal of waste have been also presented. Municipal waste was tested on three export routes. Particular attention was paid to the problems encountered in the first link of the municipal waste management logistics chain.


Solid State Phenomena | 2016

Structure and Properties of Steel Welding after Micro-Jet Cooling Process

I. Bednarczyk; Bożena Szczucka-Lasota; T. Węgrzyn; J. Piwnik

Welding with micro-jet cooling is an innovate technology. It is possible to get structure of weld metal deposit (WMD) with a very high amount of acicular ferrite (on the level of 70 %) that is not valuable for other processes. It corresponds with good impact toughness of weld. In the paper parameters of micro-jet cooling and mechanical structure of weld will be present and compared with welding without micro-jet cooling. Results of investigation are very optimistic. That technology should be treated for welding of other materials.


Journal of KONES. Powertrain and Transport | 2016

THE IMPACT OF GAS ON THE TRIBOLOGICAL PROPERTIES OF STEEL 16MnCr5 AFTER SURFACING WITH MICRO-JET COOLING

Wojciech Tarasiuk; J. Piwnik; Aleksander Hornik; T. Węgrzyn; Wojciech Majewski

This paper presents results of experimental research concerning the impact of an innovative method of micro-jet cooling on the padding weld performed with MAG welding. It enables to steer the parameters of weld cooling in a precise manner. Micro-jet cooling is a novel method patented in 2011. 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 micro-jet welding method is the innovative method, which reduces the intensity of abrasive wear. The method can be used as a basic finishing or a regeneration method. An innovative technology for micro-jet is used to cool the weld surface that is, using a micro-welding jet cooling. This allows accurate and complete control of the surface structure of the deposit. The material under study was steel 16MnCr5, which was subject to the welding process with different gases of micro-jet cooling. Nitrogen and air 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. T-11 pin-ondisc tester allows for indicating basic wear parameters (wear intensity, wear coefficient, wear force). Based on results of experiment the application of nitrogen in micro-jet cooling of the padding weld in the welding process of steel 16MnCr5 beneficially affects resistance to abrasive wear.


Dynamical Systems Theory and Applications | 2015

Optimization of Micro-Jet Selective Cooling After Low Alloy Steel Welding

T. Węgrzyn; J. Piwnik; Aleksander Borek; Wojciech Tarasiuk

The paper focuses on low alloy steel after an innovative welding method with selective micro-jet cooling. Weld metal deposit (WMD) was carried out for MIG process with micro-jet cooling. This method is very promising mainly because of the high amount of acicular ferrite in low alloy steel WMD. That structure corresponds with high impact on the toughness of welds. Dynamical systems of micro-jet cooling just after welding can find application in automotive industry.


Welding International | 2011

Welded joints carried out during post-accident repairs of automotive vehicle bodies

T. Węgrzyn; Damian Hadryś; Michał Miros

The article analyses the possibilities of post-accident repairs to vehicle bodies by means of welding. Basic connection of vehicle body components during post-accident repairs by means of spot welding and shielding gas coverage methods were discussed. Studies were also made on the results of the mechanical properties of the welded joints.


The Proceedings of the ... International Offshore and Polar Engineering Conference | 1999

The Classification of Metal Weld Deposits In Terms of the Amount of Oxygen

T. Węgrzyn


Archives of materials science and engineering | 2011

Proposal of welding methods in terms of the amount of oxygen

T. Węgrzyn


Journal of achievements in materials and manufacturing engineering | 2011

Car body welding with micro-jet cooling

T. Węgrzyn; J. Piwnik; D. Hadryś; R. Wieszała

Collaboration


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J. Piwnik

Bialystok University of Technology

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M. Miros

Silesian University of Technology

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R. Burdzik

Silesian University of Technology

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R. Wieszała

Silesian University of Technology

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Wojciech Tarasiuk

Bialystok University of Technology

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Abílio P. Silva

University of Beira Interior

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B. Łazarz

Silesian University of Technology

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D. Sieteski

Silesian University of Technology

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Zbigniew Stanik

Silesian University of Technology

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A. Wieczorek

Silesian University of Technology

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