List of approved scientific papers to be published in conference proceedings. ISSN 2311-147X Contemporary Innovation Technique of the Engineering Personnel Training for the Mining and Transport Industry 2016 (CITEPTMTI’2016). Conference Proceedings. Conference dates:   26-27 Maу 2016.   State higher education institution   "National Mining University"   Dnepropetrovsk   Ukraine

Contents

DEFORMATION HARDENING OF THE HEAVILY LOADED GEAR SURFACES FOR THE MINING INDUSTRY

S. Pakhomova¹, M. Makushina², S. Kovalenko³

¹ Ph.D., assistant Professor, e-mail: vladisl-2013@yandex.ru

^{2, 3} student, e-mail: mgtu2013@yandex.ru

^{1, 2, 3} Bauman Moscow State Technical University, Materials Department, Russia

Abstract. The deformation hardening, widely used for the increase of operability of carburized gear wheels. The plastic deformation strengthens the weak sites of the structure and complicates the microplastic deformation development in them. The efficiency of deformation hardening depends on initial structural condition of carburized layer.

The initial structural condition are determined by the termochemical treatment technology. Latter concern: carbon saturation of carburised layer; martensite morphology and carbon concentration in it; volumetric share of redundant carbide phase and its distribution in the carburised layer; the presence of retained austenite.

Keywords: high-strength steel, Termochemical Treatment, Plastic Deformation Hardening, Contact Fatigue Strength, Gas Carburization, Ion Carburization, Ion Carbonitriding.

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