Abstract
Rail grinding can effectively remove common rail defects (like crack and corrugation) to ensure the safety and stability of the rail vehicles, whereas the grinding heat generated during the grinding process becomes a critical reason for limiting the grinding speed and causing pre-fatigue or the burn on rail surface. Here, the rail grinding wheels with different porosity were fabricated to evaluate the porosity function and its practicability in rail grinding. The results illustrate that the pore structure can reduce the grinding-caused pre-fatigue. Importantly, the grinding efficiency is improved and grinding force/heat is reduced with the increasing porosity. Discoveries of this work can be applied to the future development of high-performance grinding wheels.
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