Deng Yong, Yang Bin, Yuan Jun. Cause of Transverse Fracture on U75V 60kg/m Heat-treated Rail[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(6): 153-157. doi: 10.7513/j.issn.1004-7638.2017.06.027
Citation:
Deng Yong, Yang Bin, Yuan Jun. Cause of Transverse Fracture on U75V 60kg/m Heat-treated Rail[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(6): 153-157. doi: 10.7513/j.issn.1004-7638.2017.06.027
Deng Yong, Yang Bin, Yuan Jun. Cause of Transverse Fracture on U75V 60kg/m Heat-treated Rail[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(6): 153-157. doi: 10.7513/j.issn.1004-7638.2017.06.027
Citation:
Deng Yong, Yang Bin, Yuan Jun. Cause of Transverse Fracture on U75V 60kg/m Heat-treated Rail[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(6): 153-157. doi: 10.7513/j.issn.1004-7638.2017.06.027
By detecting the macro morphology,microstructure,microhardness and chemical composition of broken rail from Central South Railway,a metal layer of high manganese steel were found being welded to the running surface of rail,which caused occurrence of brittle structure consisting of martensite and bainite formed in the base metal under weld layerdue to rapid cooling after welding.And rapid cooling resulted in thermal crack.The crack grew towards head,web and foot under the effect of 30 tons of axle load.In the end,the broken rail accident happened.
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