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Structure and Properties of Steel 40Kh2N2MA After Thermomechanical Treatment with Martensitic-Bainitic Transformation of Austenite

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Special features of structure formation in steel 40Kh2N2MA are studied after a high-temperature thermomechanical treatment with martensitic-bainitic transformation of austenite. It is shown that the treatment produces a mixed structure represented by alternating extended regions of tempered martensite and lower bainite. The treatment raises substantially the impact toughness and the crack resistance of the steel. The process is the most effective for hardening alloy steels with enhanced stability of supercooled austenite.

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Notes

  1. We imply a generalized characteristics determining the combination of mechanical properties of the construction and (or) of the material under conditions closest to the operating ones [4].

  2. The studies were performed at the Collective Use Center “Structure, Physical and Mechanical Properties of Materials” of the Novosibirsk State Technical University.

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Authors and Affiliations

  1. Novosibirsk State Technical University, Novosibirsk, Russia

    A. I. Popelyukh & A. A. Nikulina

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  1. A. I. Popelyukh
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  2. A. A. Nikulina
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Correspondence to A. I. Popelyukh.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 51 – 59, October, 2018.

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Popelyukh, A.I., Nikulina, A.A. Structure and Properties of Steel 40Kh2N2MA After Thermomechanical Treatment with Martensitic-Bainitic Transformation of Austenite. Met Sci Heat Treat 60, 666–673 (2019). https://doi.org/10.1007/s11041-019-00335-z

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  • DOI: https://doi.org/10.1007/s11041-019-00335-z

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