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Effect of Quenching and Tempering on the Structure and Properties of Hot-Rolled Pipe Steels of Strength Categories K60 and K65

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Metal Science and Heat Treatment Aims and scope

Steels of strength categories K60 and K65 are studied after quenching and tempering in order to choose an optimum heat treatment for rolled sheets, connectors and various pipeline accessories. The chemical compositions of specimens cut from different-thickness sheets from different batches are determined. The structure of the steels is studied after quenching from 800 – 1100°C and tempering at 300 – 750°C. The structure of the steels varies from a ferritic-martensitic one to a coarse acicular martensitic one depending on the quenching temperature. Anomalous refinement of austenite grains is detected in local regions in heating near 1100°C. The hardenability of the steels is shown to be below 20 mm. A mode of quenching and tempering improving the structure and the toughness is suggested for steels K60 and K65.

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Authors and Affiliations

  1. Nosov Magnitogorsk State Engineering University, Magnitogorsk, Russia

    A. N. Zavalishchin, M. I. Rumyantsev & E. V. Kozhevnikova

  2. Ausferr” Center for Research and Technology, Magnitogorsk, Russia

    A. N. Zavalishchin, M. I. Rumyantsev & E. V. Kozhevnikova

Authors
  1. A. N. Zavalishchin
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  2. M. I. Rumyantsev
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  3. E. V. Kozhevnikova
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Correspondence to A. N. Zavalishchin.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 13 – 18, January, 2023.

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Zavalishchin, A.N., Rumyantsev, M.I. & Kozhevnikova, E.V. Effect of Quenching and Tempering on the Structure and Properties of Hot-Rolled Pipe Steels of Strength Categories K60 and K65. Met Sci Heat Treat 65, 12–17 (2023). https://doi.org/10.1007/s11041-023-00884-4

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  • DOI: https://doi.org/10.1007/s11041-023-00884-4

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