4_2019_sen_7

Title of the article

APPLICATION OF PROMISING SPARINGLY ALLOYED STEELS FOR GEARS OF MOBILE MACHINES
Authors

RUDENKO Sergei P., Ph. D. in Eng., Leading Researcher, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

VALKO Aleksandr L., Senior Researcher, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SANDOMIRSKII Sergei G., D. Sc. in Eng., Head of the Laboratory of Metallurgy in Mechanical Engineering, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section TECHNOLOGICAL MECHANICS
Year 2019 Issue 4 Pages 61–69
Type of article RAR Index UDK 669.15 Index BBK  
Abstract Examples of the main types of destruction of highly loaded gears in transmissions of automotive and tractor vehicles are given. Their causes are analyzed. It is established that the criterion for the performance of highly stressed gears of transmissions subjected to hardening of chemical heat treatment is a deep contact fatigue of the active surfaces of the teeth. It is shown that to increase the resistance of contact fatigue of gears in transmissions of mobile machines, it is important to ensure high microhardness in the zone of maximum deep contact stresses. The results of the use of traditional and sparingly alloyed steels for highly loaded transmission gears are compared. The advantages of using sparingly alloyed steels are shown. It has been established that the tendency to deform of traditional high alloy steel during heat treatment is 2–4 times higher than that of sparingly alloyed steels. The lifetime of gears made of sparingly alloyed steels is increased by at least 2 times. These steels are recommended for the manufacture of highly stressed gears.
Keywords

transmission gears, sparingly alloyed steels, chemical heat treatment, cemented layers, mechanical characteristics, deformation, destruction, resource
   
Bibliography
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