Material and Structure Design for Welding Joints in Railways Basing on Mechanical-Property Tests

Zhi Gang Li; Yong Su

doi:10.4028/www.scientific.net/AMR.549.852

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 549Material and Structure Design for Welding Joints...

Material and Structure Design for Welding Joints in Railways Basing on Mechanical-Property Tests

Abstract:

Industrial design is important for industry, especially in the circumstance concerning the human security, of which the material selection and design basing on serious experiments, especially mechanical-tests have drawn more and more attentions of many artists and scientists. In this study, by tension, impact, hardness and scanning electron microscopy (SEM), the mechanical property of the flash butt welding joint of U71Mn rail steel to bainitic alloy steel used for railway frog is studied. The results indicate the distribution of hardness in the alloy steel side is uniform, and the hardness at the HAZ (hot affected zone) of the rail steel is higher than that of the base material. The tension property is the same as the U71Mn steel, and both the tension and impact property meet the corresponding requirements of Railways Ministry, which indicates the feasible of the bainitic alloy steel to the rail steel joint by flash butt welding.