Within the limits of the paper a comparative analysis of optical circuit different patterns which can be used jointly with fiber lasers for the problem of laser thermal treatment of dimension solids of rotation.
At present time in Russia under conditions of a stable industrial growth the effectiveness of railway transport work obtains importance. One of the basic expense items of “RR” Co. (“Russian Railways” Company) is connected with the intensive wear problem of contact surfaces in wheel pairs at the interaction with a railway surface. In the railway system of Russia there are used many ways for the solution of this problem such as friction constant decrease – lubrication, wear-resistance increase in wheel pairs at the expense of various methods use for surface strengthening and other methods.
The authors offer for the strengthening problem solution to use fiber lasers the application of which gives a number of incontestable advantages in comparison with common methods of material processing: a controllability of a strengthened layer depth, a possibility of surface local working and others. Today the demand for laser techniques grows actively because, in the opinion of authors, fiber lasers give a considerably higher result in comparison with common methods of processing.
Современное состояние вопроса повреждаемости гребней колесных пар и методы снижения их износа и контактной усталостиВ рамках статьи сформировано обобщенное представление вопроса повреждаемости гребней железнодорожных колесных пар, а также выполнен сравнительный анализ применения различных методов повышения износостойкости и контактной усталостной прочности данных поверхностей.Ключевые слова: волоконный лазер; лазерное упрочнение; износостойкость; контактно-усталостная прочность; термическая обработка.
Current state of problem in wheel pair flange damages and methods for decrease of their wear and contact fatigueWithin the limits of the paper there is formed a generalized idea of the problem of flange damages in railway wheel pairs, and also a comparative analysis of different methods application to increase wear-resistance and contact fatigue strength of surfaces mentined.
There are presented theoretical and experimental investigations of wheel steel laser thermal treatment with the use of ytterbium fiber laser. Thermal treatment modes are obtained on the basis of the mathematical modeling preliminarily carried out of the heat propagation processes by a finite element method.
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