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Surface Analysis of Railway Buffers Heads Covered with Bronze Using Laser Cladding

Sitarz M., Kurc-Lisiecka A., Gamon W.

Archives of Foundry Engineering

2017

Vol. 17, iss. 2

89--94

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 When the wear is excessive, it might be a reason to withdrawn vehicle from service, it causes flattening of buffer head, and in consequence its abnormal cooperation.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.

Spiętrzenie naprężeń wynikające z falistości złącza materiałów platerowanych metodą wybuchową - symulacja MES

Kurek A., Niesłony A., Bański R., Polak-Micewicz M.

Systems : journal of transdisciplinary systems science

2012

Vol. 16, nr 2

243-251

Praca zawiera analizę numeryczną strefy złącza bimetalu stal-tytan uzyskanego metodą wybuchową. Ze względu na falistość tej strefy i różne własności materiałów składowych materiały tego typu zawierają karb strukturalny. Dlatego też istotne między innymi z punktu widzenia prezentacji wyników zmęczeniowych są naprężenia maksymalne, które występują właśnie w okolicy tej strefy. W pracy zaproponowano metodę modelowania strefy złącza profilem sinusoidalnym.

The paper contains a numerical analysis of interface zone steel-titanium bimetal obtained by explosive cladding method. Due to the wave of the zone, and various properties of the constituent material of the materials type contain structural notch. Therefore it is important inter alia in terms of presentation of the results of fatigue are the maximum stresses that occur just in the area of the zone. The method of modeling the joint zone by a sinusoidal profile was proposed.