Field evaluation of improved rail welding methods

摘要

TTCI has conducted testing of HAZ overlay treated welds at FAST and has worked with CN to test HAZ overlay treatments in revenue service. Welds at FAST have accumulated 108 mgt with one weld failure in an untreated weld as of January 2014. Welds in CN revenue service lines have accumulated from 51 to 56 mgt with no failures. HAZ treatments appear to be reducing the overall rate of thermite weld batter, including at the weld centerline. The combination of HAZ overlay and alloying of the weld head produced the greatest reduction in running surface degradation.