Development of Manufacturing Technology for High-Strength Hull Steel Reducing Production Cycle and Providing High-Quality Sheets
- 1 — NRC «Kurchatov Institute» – CRISM «Prometey»
- 2 — NRC «Kurchatov Institute» – CRISM «Prometey»
- 3 — Saint-Petersburg Mining University
- 4 — NRC «Kurchatov Institute» – CRISM «Prometey»
Abstract
The article presents the results of scientific research and industrial experiments aimed at the development of technology to reduce the production cycle of high-strength hull steel. The technology includes an improved reduced heat treatment of ingots made using rare-earth metals and uphill teeming of large sheet ingots. The proposed technology for the preliminary heat treatment of ingots eliminates the high-temperature phase re- crystallization operation, which is unnecessary, according to the authors, since it does not allow partial crushing (grinding) of the metal dendritic structure and homogenization. When using the proposed technology of reduced pre- treatment, phase and structural stresses are sharply reduced. Experiments have shown that the modification of steel with rare-earth metals has a positive effect on the crystallization of ingots, changing the macro- and microstructure of alloy steel. The developed manufacturing technology of high-strength hull steel provides a high level of sheet quality and a reduction in the production cycle time by 10-12 %.
References
- Akimenko A.D., Skvortsov A.A. On the issue of thermal stresses in the incipient sinterskin of a continuously cast ingot. Fiziko-khimicheskie i teplofizicheskie protsessy kristallizatsii stal'nykh slitkov: Trudy II konferentsii po slitku. Moscow: Metallur- giya. 1967, p. 457-462 (in Russian).
- Milyuts V.G., Tsukanov V.V., Malykhina O.Yu., Nasonovskaya A.B., Vladimirov A.G., Golubtsov V.A., Levagin E.Yu. The effect of complex modification of high-strength shipbuilding steel on the composition and morphology of non-metallic inclu- sions. Voprosy materialovedeniya. 2013. N 4 (76), p. 5-14 (in Russian).
- Golubtsov V.A., Milyuts V.G., Tsukanov V.V. The effect of complex modification on pollution by non-metallic inclusions of shipbuilding steel.Tyazheloe mashinostroenie. 2013. N 1, p. 6-9 (in Russian).
- Golubtsov V.A., Kuz'kina N.N., Kadarmetov A.Kh. Increasing the degree of chemical uniformity of large ingots of high carbon steel. Stal'. 2000. N 12, p. 11-12 (in Russian).
- Golubtsov V.A. Theory and practice of introducing additives into steel outside the furnace. Chelyabinsk, 2006, p. 423 (in Russian).
- Gol'dshtein Ya.E., Mizin V.G. Modification and microalloying of cast iron and steel. Moscow: Metallurgiya. 1986, p. 272 (in Russian).
- Leites A.V., Lapotyshkin N.M. Cracks in steel ingots. Moscow: Metallurgiya. 1969, p. 111 (in Russian).
- Milyuts V.G., Tsukanov V.V., Vladimirov N.F. Study of the quality of ultra-thick sheets of high-strength shipbuilding steel.
- Metallurg. 2013. N 3, p. 60-65 (in Russian).
- Milyuts V.G., Vladimirov N.F., Batov Yu.M. Development of technology for the production of ingots of high-strength case steel for the manufacture of thick sheets. Part 1. Elektrometallurgiya. 2014. N 9, p. 16-22 (in Russian).
- Vladimirov N.F., Lutsenko A.N., Durynin V.A., Batov Yu.M., Malakhov N.V., Mileikovskii A.B., Milyuts V.G. From electroslag remelting to after-furnace refining. Sb. trudov «Po puti sozidaniya». Vol. 2. TsNII KM «Prometei». St. Petersburg, 2009,
- p. 58-69 (in Russian).
- Pridantsev M.V., Ostapenko T.V. The effect of rare earth metals on the structure and properties of steels 18Н10Т, Х17Н1М2Т, 00Х17Н1. Izvestiya AN SSSR. Metally. 1974. N 3, p. 136-140 (in Russian).
- Milyuts V.G., Tsukanov V.V., Kazakov A.A., Motovilina G.D., Afanas'ev S.Yu. Improving the technology of casting large forging ingots of high-strength shipbuilding steel. Chernye metally. 2011. N 1, p. 9-13 (in Russian).