Cast High-Strength Wear- and Corrosion-Resistant Austenitic Nitrogen Steel for Fittings Used in Shipbuilding

Abstract:

The paper presents the results of studies of a new cast high-strength austenitic corrosion-resistant steel, which can be successfully used in shipbuilding for the manufacture of fittings. The authors included data on the structural-phase state of steel, the results of evaluating the mechanical properties, wear and corrosion resistance of the metal of castings in the cast and heat-treated state. The mechanical properties of steel are considered in detail in a wide temperature range. The impact strength was considered at low temperatures and static strength at 20 to 350 ° C. It is shown that steel has higher mechanical and corrosive properties in a wide temperature range than those of traditional stainless steels. The corrosion resistance of steel is considered. This is intergranular and pitting corrosion; the main types of corrosion are peculiar for shipbuilding. It has been shown that cast steel is superior to traditional corrosion-resistant steels in pitting corrosion resistance estimated by the pitting coefficient PREN and the critical temperature of pitting. The new cast steel has the same wear resistance as Hadfield steel.

• Periodical: Key Engineering Materials (Volume 909)
• Pages: 41-47
• DOI: https://doi.org/10.4028/p-iqrjh9
• Online since: February 2022
• Authors: Sarkis Muradyan, M.V. Kostina, V.S. Kostina, Ludmila Rigina, Viktor M. Timokhin*
• Keywords: Austenitic Steel, Cast Corrosion Resistance, High-Nitrogen Steel, Mechanical Corrosion Properties, Structure

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