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Effect of complex microalloying with titanium and boron on the structure and properties of 14G2 steel

  • Structural Steels
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    The cold-resistance of the 14G2 steel increases markedly after its microalloying by an optimum amount of titanium and boron (0.026% Ti and 0.0014% B). This is associated with an improvement of the microstructure, a reduction of the volume content and size of inclusions, and a change in their composition which leads to a reduction in the possibility of formation of greatly stretched lines during rolling.

  2. 2.

    An increase of the concentration of titanium and boron above the optimum values, to 0.049% Ti and 0.0060% B, leads to the formation of a nonuniform structure, to growth of general contamination of the metal, as well as to formation of a large amount of embrittling filmlike segregations of titanium carbonitrides on grain boundaries, which will result in the reduction of cold-resistance of steel.

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Literature cited

  1. Boron, Calcium, Niobium and Zirconium in Cast Iron and Steel [in Russian], Metallurgizdat, Moscow (1961).

  2. Zolle, "Production of cemented and improved steels, alloyed with boron," Chermetinformatsiya, Moscow, No. 13 (106), Moscow (1981).

  3. L. L. Pyatakova, "On the mechanism of the effect of boron on the plasticity and viscosity of medium-carbon steel," Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 12, 88–91 (1974).

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Authors
  1. V. V. Shchigolev
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  2. G. S. Ershov
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  3. A. A. Sotnik
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  4. V. V. Akulov
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Additional information

Institute of the Problems of Materials Science, Academy of Sciences of the Ukrainian SSR. V. I. Lenin Donets Metallurgical Plant. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 23–25, September, 1988.

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Shchigolev, V.V., Ershov, G.S., Sotnik, A.A. et al. Effect of complex microalloying with titanium and boron on the structure and properties of 14G2 steel. Met Sci Heat Treat 30, 672–674 (1988). https://doi.org/10.1007/BF00700359

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  • DOI: https://doi.org/10.1007/BF00700359

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