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Evaluation of Hadfield Layer Welding on Transportation Materials Using the Plasma Method

Authors: Dadkhah Arman | Schmidová Eva

Year: 2024

Type of publication: ostatní - článek ve sborníku

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Evaluation of Hadfield Layer Welding on Transportation Materials Using the Plasma Method	Hadfield steel is vital in high-stress railway track components. This study compares powder and flux-cored wire filler metals in welded rail for rebuilding applications, examining their effects on microstructure, structural degradation, mechanical properties, and heat transfer during formation of layers. It emphasizes enhancing resistance to contact fatigue and investigates structural degradation for both filler metals. Plasma technology is evaluated for achieving structural stability, crucial for dynamic strengthening and high fracture toughness. Optical and electron microscopy, alongside mechanical tests, assess microstructural evolution and behavior like spherical indentation and hardness tests, are employed. The role of filler metals in microstructure and mechanical behavior is highlighted, focusing on grain structure, phase distribution, and defects. Energy dispersive spectroscopy (EDS) analysis reveals chemical hetrogenity and inclusions sources. These findings significantly advance railway welding practices, contributing to rail surface welding for challenging conditions.	hadfield steel; welded rail joints; powder filler metals; flux-cored wire; heat transfer simulation