Title of the article

RESISTANCE TO CONTACT FATIGUE OF COARSE-GRAINED GEARS OF CHROMIUM-NICKEL STEELS

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.

SHYSHKO Sergei A., Deputy General Designer, OJSC “BELAZ” — Management Company of Holding “BELAZ-HOLDING”, Zhodino, 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.

KARPOVICH Peter G., Head of the Design Office, OJSC “BELAZ” — Management Company of Holding “BELAZ-HOLDING”, Zhodino, 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 MATERIALS SCIENCE IN MECHANICAL ENGINEERING
Year 2019 Issue 1 Pages 58–63
Type of article RAR Index UDK 621.833 Index BBK  
Abstract

The results of complex studies of coarse-grained gears made of carburized chromium-nickel steel 20Kh2N4A are presented. It is shown that with the stable operation of thermal equipment fitted with computer-aided systems for automatic control of the parameters of the technological process of chemical heat treatment in coarse-grained gears of steel 20Kh2N4A, a diffusion layer is formed with a surface hardness of 60–61 HRC and an effective thickness (0.08–0.1)m to a microhardness of 750 HV0.2. It is found that the increased kinematic error after chemical heat treatment of gears made of steel 20Kh2N4A leads to uneven removal of the allowance at the final grinding of the teeth, which is the reason for reducing the resistance of contact fatigue in the local area of the diffusion layers of the teeth.

Keywords

coarse-grained gear wheels, chromium-nickel steel, chemical heat treatment, kinematic error, resistance to contact fatigue

   
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