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Registration Number

0215U000643, 0114U000818 , R & D reports

Title

Development and experimental approbation of effective methods of operating resource evaluation of high-strength railway wheels at their design and production stages

Head

Kulyk Volodymyr,

Registration Date

20-03-2015

Organization

Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine

Description

It is established that the intensity of rolling surface damage of model wheels correlates with cyclic fracture toughness of steels determined under Mode I (?KIfc) and Mode II (?KIІfc) fracture thus confirming the model scheme of pitting and shelling in railway wheels. It is shown that the carbonitride strengthening positively influences the strength, impact resistance and damage resistance of the model wheels rolling surface. It is found that an increase in life time of railway wheels by the criteria of wear resistance and shelling of their rolling surface can provide wheel steels with a bainite-martensite structure. The new heat treatment behavior of the wheel steels with a bainite-martensite structure is proposed, that essentially raises its of fatigue crack growth resistance characteristics (in 1.6-1.8 times). Accoding to the proposed diagrams of operation reliability this must raise essentially life time of railway wheels.

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Андрейко Ігор Михайлович
Віра Володимир Володимирович
Дзера Володимир Юрійович
Ленковський Тарас Михайлович
Осташ Орест Петрович
Перегінець Володимир Миколайович
Чабан Михайло Іванович