Structure and Contact Fatigue Strength of Heat-Resistant Steel VKS-7 Hardened Layers After Ion-Plasma Nitriding


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Abstract

Structure is studied for diffusion layers of heat-resistant steel 16Kh2N3MFBAYu-Sh prepared by ion-plasma nitriding, and their phase composition is established represented by ultra-finely dispersed incoherent chromium nitride particles in a solid solution matrix. Contact fatigue strength of the nitrided layer prepared by an optimized regime is determined by experiment. A feature is established for the effect of nitride layer thickness on contact fatigue strength for heat-resistant steel alloyed with nickel. Nitriding regimes are recommended for treating low modulus gear wheels and other similar components whose performance is governed by contact fatigue strength.

About the authors

S. A. Gerasimov

Bauman Moscow State Technical University

Author for correspondence.
Email: gerasimov_s@list.ru
Russian Federation, Moscow

L. I. Kuksenova

Blagonravov Institute of Mechanical Engineering, Russian Academy of Sciences (IMASh RAN)

Email: gerasimov_s@list.ru
Russian Federation, Moscow

M. Yu. Semenov

Bauman Moscow State Technical University

Email: gerasimov_s@list.ru
Russian Federation, Moscow

A. E. Smirnov

Bauman Moscow State Technical University

Email: gerasimov_s@list.ru
Russian Federation, Moscow

S. P. Shcherbakov

Bauman Moscow State Technical University

Email: gerasimov_s@list.ru
Russian Federation, Moscow

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