Heat Transfer Modelling and Mechanical Properties Of Wide-Gap Thermite Rail Welds, Ph.D. Dissertation Sharif University of Technology ; Kokabi, Amir Hossain (Supervisor) ; Davami, Parviz (Supervisor)
Abstract
Wide-gap aluminothermic rail welds with root opening of 60 mm were produced using plain carbon steel rail and non-alloy aluminothermic charge. Such process can repair defective rails, each with only one wide-gap weld instead of using a relatively long plug rail and two standard welds which reduces number of welds in railways and cause saving in money. Required equipments including metallic and sand molds, crucible and self-tapping thimble were designed. Mechanical properties and micro-structure of rail welds and corresponding heat affected zones as well as impact energies and fracture toughnesses of welds were investigated. Wide-gap aluminothermic rail welds exhibited 98% and 95% of yield...
Cataloging briefHeat Transfer Modelling and Mechanical Properties Of Wide-Gap Thermite Rail Welds, Ph.D. Dissertation Sharif University of Technology ; Kokabi, Amir Hossain (Supervisor) ; Davami, Parviz (Supervisor)
Abstract
Wide-gap aluminothermic rail welds with root opening of 60 mm were produced using plain carbon steel rail and non-alloy aluminothermic charge. Such process can repair defective rails, each with only one wide-gap weld instead of using a relatively long plug rail and two standard welds which reduces number of welds in railways and cause saving in money. Required equipments including metallic and sand molds, crucible and self-tapping thimble were designed. Mechanical properties and micro-structure of rail welds and corresponding heat affected zones as well as impact energies and fracture toughnesses of welds were investigated. Wide-gap aluminothermic rail welds exhibited 98% and 95% of yield...
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