Effect on wheel-rail wear resistance and anti-fatigue contact performance

Regarding the research on friction and lubrication between wheel and rail, the research of TTCI in the United States has attracted more attention. They conducted a large number of wheel-rail lubrication and friction coefficient change tests on the closed-loop test line of the American Railway Experimental Research Center. Through experiments, it is proved that the combination of rail top lubrication and rim lubrication can effectively reduce wheel and rail wear, reduce the loss of traction energy, and reduce the force through the curve. As a result, the economic profit brought by it is enormous.

When the friction coefficient between the wheels and rails reaches 0.3-0.35, the economic benefits obtained are the best. When the friction coefficient is lower than 0.3, the wear between the wheels and rails is favorable, but the traction is unfavorable. Material and Fatigue Research The Japanese railway research department has conducted experimental research on the microstructure and chemical composition of the wheel and rail, and on wear resistance and contact fatigue resistance in recent years.

The impact of various angle changes between wheel and rail on the wear resistance and fatigue resistance of the wheel and rail was studied on a fatigue tester. Through tests, it was found that as the angle of attack increases, wear and contact fatigue of the wheel and rail will increase. . In order to understand the influence of the microstructure (such as pearlescent population, thin cementite structure) characteristics, a variety of microstructure characteristics of the wheel and rail wear resistance and anti-fatigue contact performance were experimentally studied, and detailed analysis and Evaluation. The results obtained show that the fine arrangement of the microstructures effectively improves the wear and fatigue performance of the wheel rails.

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