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Study of microstructure and properties of ultrahigh-strength pipe steel of strength category x120 prepared under laboratory conditions

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Experimental melting is carried out at the Bardin TsNIIchermet research complex for smelting steel of strength category X120 of two chemical composition versions: microalloyed with and without boron. Thermomechanical rolling is implemented in a laboratory rolling mill with different interrupted cooling temperatures in order to form ferrite-bainite, bainite, and martensite structures. Accelerated tempering technology is simulated, including accelerated heating after interrupted accelerated cooling to 620–640°C with the aim of increasing ductility and toughness. Mechanical tests and metallographic analysis are performed. The steel obtained exhibits mechanical properties corresponding to strength category X120 according to ISO 3183:2007.

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References

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Authors and Affiliations

  1. Bardin Central Research Institute of Ferrous Metallurgy (TsNIIchermet), Moscow, Russia

    Yu. D. Morozov, I. A. Simbukhov & D. L. Dyakonov

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  1. Yu. D. Morozov
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  2. I. A. Simbukhov
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  3. D. L. Dyakonov
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Correspondence to Yu. D. Morozov.

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Translated from Metallurg, No. 7, pp. 50–56, July, 2012.

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Morozov, Y.D., Simbukhov, I.A. & Dyakonov, D.L. Study of microstructure and properties of ultrahigh-strength pipe steel of strength category x120 prepared under laboratory conditions. Metallurgist 56, 510–518 (2012). https://doi.org/10.1007/s11015-012-9607-7

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  • DOI: https://doi.org/10.1007/s11015-012-9607-7

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