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In this study, results of aluminum bronze coatings (CuAl9Fe3) and manganese bronze coatings (CuMn11Al8Fe3Ni3) deposited on specimens made of S355J2 steel using the laser cladding method are presented. This research was carried out to learn the wear mechanisms and tribological parameters of the analyzed bronze coatings in terms of their applicability for railway buffer heads, instead of covering the latter with graphite grease, which entails several disadvantages. It was found that the laser cladding method allows obtaining durable coatings of aluminum bronze (CuAl9Fe3) and manganese bronze (CuMn11Al8Fe3Ni3) on a substrate made from S355J2 steel. Microscopic examination performed after laser cladding of the above described bronzes showed the presence of three zones: the coating, the heat affected zone, and the substrate. The CuMn11Al8Fe3Ni3 manganese bronze coating was characterized by a significantly higher hardness (236.9 HV) than in the case of the CuAl9Fe3 aluminum bronze (181.5 HV). Based on the obtained results, it was found that aluminum bronze coatings had higher wear resistance in comparison to manganese bronze coatings, which may be associated with a higher fraction of Cu2O and Al2O3 phases. The results obtained indicate that the use of a CuAl9Fe3 coating allows for a significant reduction of sliding wear compared to uncoated samples (average wear was reduced by approx. 89.36%), while the use of graphite lubricant allows for an average wear reduction of ca. 91.35%. SEM examination of the specimen surfaces coated with aluminum and manganese bronze showed visible signs of scratching, plowing and micro-cutting, which proves the sliding nature of the specimen wear.
Wojciech Gamon; Krzysztof Aniołek. Examination of the sliding wear of bronze coatings on railway buffer heads. Wear 2020, 448-449, 203235 .
AMA StyleWojciech Gamon, Krzysztof Aniołek. Examination of the sliding wear of bronze coatings on railway buffer heads. Wear. 2020; 448-449 ():203235.
Chicago/Turabian StyleWojciech Gamon; Krzysztof Aniołek. 2020. "Examination of the sliding wear of bronze coatings on railway buffer heads." Wear 448-449, no. : 203235.
Railway cross-border transport is a special case of railway transport, which, due to the necessity of crossing the state border, raises many difficulties. They result from factors, among which the most important are other power systems, control systems, a variety of regulations regarding traffic management or even problems with communication, resulting from the different languages. These difficulties involve a number of consequences for the fluency and efficiency of transportation, but more importantly, have negative effects on safety. The article describes the main problems of cross-border transport on the example of Poland and two neighbouring countries (Germany and Czech Republic), which are also members of the European Union. For this purpose, in cooperation with the Polish railway undertakings, an analysis was carried out of processes conducted by these in the field of cross-border transport and identifies the main problems in this area. As part of the conducted research, potential solutions and improvements were also proposed. The article focuses solely on the issues of crossing the border and manoeuvring operations at stations close to the German and Czech borders, inasmuch as these processes constitute the largest area of activity of Polish railway undertakings within the framework of rail cross-border transport.
Wojciech Gamon; José Manuel Naranjo Gómez. Main Problems of Railway Cross-Border Transport Between Poland, Germany and Czech Republic. Sustainability 2019, 11, 4900 .
AMA StyleWojciech Gamon, José Manuel Naranjo Gómez. Main Problems of Railway Cross-Border Transport Between Poland, Germany and Czech Republic. Sustainability. 2019; 11 (18):4900.
Chicago/Turabian StyleWojciech Gamon; José Manuel Naranjo Gómez. 2019. "Main Problems of Railway Cross-Border Transport Between Poland, Germany and Czech Republic." Sustainability 11, no. 18: 4900.
Railway buffers during the operation are staying in almost permanent contact with each other, creating friction node in the point of contact of two railway buffer heads. In consequence of overcoming track curves, turnouts and unevenness of track, the railway buffer heads moves relative to each other causing friction, which results in its wear. When the wear is excessive, it might be a reason to withdrawn vehicle from service, it causes flattening of buffer head, and in consequence its abnormal cooperation. To avoid this phenomenon the buffer heads should be covered with graphitized grease, but this method has many disadvantages. Accordingly, it was found that it would be beneficial to cover the buffer head with bronze using laser cladding. In this article the metallographic and mechanical analysis of the newly created top layer of railway buffer head are presented. In article the results from tribological tests conducted on Amsler test bench are also presented. Based on test results described in article concluded that the layer of bronze coat on working surface of railway buffer head can be beneficial from operational point of view.
M. Sitarz; A. Kurc-Lisiecka; W. Gamon. Surface Analysis of Railway Buffers Heads Covered with Bronze Using Laser Cladding. Archives of Foundry Engineering 2017, 17, 89 -94.
AMA StyleM. Sitarz, A. Kurc-Lisiecka, W. Gamon. Surface Analysis of Railway Buffers Heads Covered with Bronze Using Laser Cladding. Archives of Foundry Engineering. 2017; 17 (2):89-94.
Chicago/Turabian StyleM. Sitarz; A. Kurc-Lisiecka; W. Gamon. 2017. "Surface Analysis of Railway Buffers Heads Covered with Bronze Using Laser Cladding." Archives of Foundry Engineering 17, no. 2: 89-94.
The paper presents movement analysis of railway buffer heads. The analysis was based on recorded video of cooperating railway buffers during operation. In this paper is presented displacement of operating railway buffer heads in horizontal and vertical plane. Furthermore in paper is specified buffer stroke during operation with maximum speed of 40 km/h. Relating these values to the static characteristic of analyzed buffer it was possible to determine the values of longitudinal forces acting on buffer under determined conditions.
Wojciech Gamon. MOVEMENT ANALYSIS OF COOPERATING RAILWAY BUFFER HEADS. Archives of Transport 2015, 33, 7 -15.
AMA StyleWojciech Gamon. MOVEMENT ANALYSIS OF COOPERATING RAILWAY BUFFER HEADS. Archives of Transport. 2015; 33 (1):7-15.
Chicago/Turabian StyleWojciech Gamon. 2015. "MOVEMENT ANALYSIS OF COOPERATING RAILWAY BUFFER HEADS." Archives of Transport 33, no. 1: 7-15.