This study deals with the wear experienced in welded joins for pipelines. Its aim is to minimize the problems caused by this wear. An analysis is carried out on the tribological behaviour of three crucial areas within the welding: the base metal, the heat affected zone and the weld bead zone itself. The differences in mechanical properties between these areas are evaluated. Moreover, various alternatives in the welding process are proposed in an effort to improve the overall behaviour of the join. Wear, hardness, and metallography tests were carried out on the base metal, HAZ, and weld bead for three samples welded using different procedures. The hardness, wear, and metallographic structure in each sample varies, according to the zone in which it is measured. The greatest hardness is found in the sample welded without pre- or post-weld treatment and the least in the sample treated in both cases. The zone with the greatest wear is the HAZ, with the wear between zones being more uniform for the pre-heated but not post-weld-treated sample.
A study on wear of welded joins for pipelines
Welding International ; 24 , 2 ; 120-124
2010
5 Seiten, 10 Bilder, 2 Tabellen, 14 Quellen
Article (Journal)
English
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