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<p>The first part of the review concerned the chronology of the development of heat-resistant bearing steels for aircraft engines. Heat-resistant bearing steels used in modern high-speed aircraft engines are analyzed in the second part. To increase the resistance of rings to cracking under high circumferential stresses, these steels are subjected to a thermochemical treatment (carburizing, nitriding) or to a duplex process combining a conventional heat or thermochemical treatment with subsequent nitriding. It is shown that a promising direction for advancing aircraft engine bearing steels is creation of hybrid bearings combining ceramic rolling components and duplex-hardened steel rings. The review presents data on the chemical composition, microstructure, hard-ness, fatigue life and recommended operating temperatures for each steel.</p>

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Review of Development of Domestic and Foreign Heat-Resistant Bearing Steels for Aircraft Engines and of Methods of Their Heat Hardening. Part 2

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • T. M. Pugacheva

摘要

The first part of the review concerned the chronology of the development of heat-resistant bearing steels for aircraft engines. Heat-resistant bearing steels used in modern high-speed aircraft engines are analyzed in the second part. To increase the resistance of rings to cracking under high circumferential stresses, these steels are subjected to a thermochemical treatment (carburizing, nitriding) or to a duplex process combining a conventional heat or thermochemical treatment with subsequent nitriding. It is shown that a promising direction for advancing aircraft engine bearing steels is creation of hybrid bearings combining ceramic rolling components and duplex-hardened steel rings. The review presents data on the chemical composition, microstructure, hard-ness, fatigue life and recommended operating temperatures for each steel.