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Research of quality of high-strength shipbuilding steel with high concentration of calcium
https://doi.org/10.22349/1994-6716-2019-98-2-20-26
Abstract
The paper studies the microstructure, presence and qualitative composition of nonmetallic inclusions, mechanical tests of industrial smelting of high-strength shipbuilding steel with calcium concentration in the bucket sample of 0.009% have been performed. Steel with a high concentration of calcium is contaminated with a variety of stitch oxide inclusions, and therefore the mechanical properties of the rolled product are sharply reduced (impact strength, ductility in the Z-direction, fracture quality of technological samples). It is shown that the upper permissible limit of calcium content in steel is within the range 0.004–0.009%, but it is necessary to clarify it performing additional research. To ensure high purity of high-strength shipbuilding steel for non-metallic inclusions, it is vital to observe a strictly regulated technology of aluminum deoxidation and modification by ferrocalcium with obtaining the content of these elements in the metal in the previously recommended limits 0.01–0.02 and 0.002–0.004% respectively.
Keywords
Supporting agencies: Experimental studies were performed on the equipment of the laboratory of the Test and Technical Complex of Irradiated and Radionuclide Materials and the Center for Collective Use “Composition, Structure and Properties of Structural and Functional Materials” of the NRC “Kurchatov Institute” – CRISM “Prometey”.
About the Authors
V. G. Miliuts
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
V. V. Tsukanov
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Dr. Sci (Eng)
Russian Federation
Dr. Sci (Eng)
A. G. Pavlov
JSC “ОМZ-Spetsstal”
Russian Federation
Russian Federation
D. L. Smirnova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
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Review
For citations:
Miliuts V.G., Tsukanov V.V., Pavlov A.G., Smirnova D.L. Research of quality of high-strength shipbuilding steel with high concentration of calcium. Voprosy Materialovedeniya. 2019;(2(98)):20-26. (In Russ.) https://doi.org/10.22349/1994-6716-2019-98-2-20-26
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