Results 21 to 30 of about 468 (126)
Rail degradation due to thermite weld discontinuities:Field experience [PDF]
, 2021 This paper details the field-testing approach and results of thermite welds used in railway applications. Rail steels made from R260 grades are welded by two different processes: the standard process according to the European standards, and a recent ...
Bezin, Yann +5 more
core +2 more sources
Advances in Materials Science and Engineering, Volume 2021, Issue 1, 2021., 2021 A new welding method, ultranarrow gap welding with constrained arc by flux band, is proposed to compensate for the low quality of rail thermite welded joints. This article presents the results of research on the microstructure and mechanical properties of ultranarrow gap welded joints of U71Mn rail steel made using three types of alloying composition ...
Lian Gong +4 more
wiley +1 more source
Investigation of structure and mechanical properties aluminothermic welded joints of rails [PDF]
Bulletin of the South Ural State University Series ‘Metallurgy’, 2016 Welded joints of rails are an integral part of continuous welded railway. However, they often do not have sufficient reliability during the operation. The paper presents the results of study of hardness and structure of aluminotermitic welded rail joints.
L.B. Tikhomirova +3 more
openaire +3 more sources
Obtaining and evaluation of abrasive materials [PDF]
, 2023 During the manufacture of flats and terrazzo, grinding and polishing operations are compulsory, which are carried out with abrasive wheels. The work deals with the obtaining and evaluation of abrasive materials from aluminothermic processing of solid ...
Coello Machado, Norge Isaias +3 more
core +1 more source
The Investigation of Mechanical Properties of Welding Quality of R65 Type Rail
Mokslas: Lietuvos Ateitis, 2014 This article is about the aluminothermic welding quality ofrail joints, using different parameters. The thermit portion andpreheat time estimated for quality of welded joints as well asthe mechanical characteristics of aluminothermic welds in railshave ...
Mindaugas Rauduvė, Vitalijus Rudzinskas
doaj +1 more source
Residual stresses in thermite welded rails: significance of additional forging [PDF]
, 2020 The aluminothermic welding (ATW) process is the most commonly used welding process for welding rails (track) in the field. The large amount of weld metal added in the ATW process may result in a wide uneven surface zone on the rail head, which may, in ...
Bisschop, Roeland +3 more
core +1 more source
The effect of white etching layer patches on a larger rail defect [PDF]
, 2017 Manufacturing defects such as porosity that formed in the rail could result in catastrophic failure if it remain in service. In this study, a crack that initiated from a large void was modelled using boundary element model to investigate the effect of ...
Cannon +8 more
core +3 more sources
In situ modification of CaF2-SiO2-Al2 O3-MgO flux applied in the aluminium-assisted transfer of titanium in the submerged arc welding of carbon steel : process mineralogy and thermochemical analysis [PDF]
, 2022 DATA AVAILABILITY : The data sets presented in this study are available upon request from the corresponding author.Flux formulations are specified to target chemical and physico-chemical parameters.
Coetsee, Theresa, De Bruin, Frederik
core +1 more source
Mokslas: Lietuvos Ateitis, 2012 The article describes inherent defects to aluminothermic welds, the origin of reasons and the ways of avoidance. The paper presents visual surface and fracture testing of rail joint R65 applying the method of aluminothermic welded joints. Santrauka
Aistė Šimonėlytė +2 more
doaj +1 more source
Methods of elimination of rails increased damage in the area of weld joints
Вестник Научно-исследовательского института железнодорожного транспорта, 2019 Rail weld joints from electric-contact welding in stationary and fi eld conditions, as well as those from aluminothermic welding are weak points on tracks that are easily damaged compared with rails outside the weld joints.
E. A. Shur +4 more
doaj +1 more source