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Effect of laser microalloying with niobium on the wear resistance of stainless steels

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We have studied the effect of laser alloying of 20Kh13 and 12Kh18N10T steels with niobium on their physicochemical properties. Microalloyed surface layers of thickness more than 350 μm, enriched with niobium, carbon, and oxygen in the solid solution and separate oxycarbide inclusions, were formed by means of laser treatment. The microhardness of the external layers of steels becomes 2–3 times higher (up to 7.1–7.7 GPa). Laser alloying reduces the wear of 20Kh13 steel by a factor of 5–6 under a contact pressure of 0.29 MPa and cuts it in half under 0.42 MPa. The wear of 12Kh18N10T steel is reduced by a factor of 2–3. We have also proposed a scheme of the wear of steels, according to which their wear resistance increases owing to the formation of hardened surface layers, where the oxycarbide inclusions exert a reinforcing action on the more plastic solid solution of niobium, carbon, and oxygen in iron.

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Authors and Affiliations

  1. Karpenko Physicomechanical Institute, Ukrainian National Academy of Sciences, Lviv, Ukraine

    V. V. Shyrokov, Kh. B. Vasyliv & N. B. Rats’ka

  2. “L’vivs’ka Politekhnika” National University, Lviv, Ukraine

    Z. A. Duryahina & H. V. Laz’ko

Authors
  1. V. V. Shyrokov
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  2. Kh. B. Vasyliv
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  3. Z. A. Duryahina
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  4. H. V. Laz’ko
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  5. N. B. Rats’ka
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Correspondence to Kh. B. Vasyliv.

Additional information

Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 45, No. 4, pp. 12–18, July–August, 2009.

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Shyrokov, V.V., Vasyliv, K.B., Duryahina, Z.A. et al. Effect of laser microalloying with niobium on the wear resistance of stainless steels. Mater Sci 45, 473–480 (2009). https://doi.org/10.1007/s11003-010-9204-5

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  • DOI: https://doi.org/10.1007/s11003-010-9204-5

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