The features of structure formation, phase composition, properties and isothermal decomposition kinetics of supercooled austenite in chromium-manganese cast iron
Keywords:
chromium-manganese cast iron, decomposition kinetics of supercooled austenite, bainite, TTT diagram, phase compositionAbstract
Formulation of the problem. The problem of materials quality improvement for wear resistance equipment while reducing the cost of production are still very relevant. Recent studies indicate that promising materials for use in such environment with a high level of properties and low production cost are economically alloyed chromium-manganese cast irons. Study kinetics of transformations in these alloys is a key factor for the future selection of the hardening heat treatment. Presented results of the study decomposition kinetics of supercooled austenite in chromium-manganese cast iron with chemical composition carbon 2,7 %, chromium − 15.9 %, manganese − 10.5 %. Conclusions: temperature intervals of austenite decomposition on pearlite (550…400 °C) and bainite (350…250 °C) areas were discovered. Phase composition of chromium-manganese cast iron after isothermal soaking was determinated. The maximum hardness of cast iron is formed during isothermal soaking in the pearlite area at 500 °C (46,7 HRC) temperature and in the bainite area at 250 °C (49 HRC).
References
Stachowiak G. B. Ball-cratering abrasion tests of high-Cr white cast irons / G. B. Stachowiak, G. W. Stachowiak, O. Celliers // Tribol. Int. − 38 (2005). − Pp. 1076–1087. − Режим доступа: https://goo.gl/OkUooy
Kim C.K. Effects of heat treatment on wear resistance and fracture toughness of Duo-Cast materials composed of high-chromium white cast iron and low chromium steel / C. K. Kim, S. Lee, J.-Y. Jung // Metall. Mater. Trans. − A 37A (2006). − Рр. 633–643. − Режим доступа: https://goo.gl/8ua9b5
Albertin E. Effect of carbide fraction and matrix microstructure on the wear of cast iron balls tested in a laboratory ball mill / E. Albertin, A. Sinatora // Wear. − 250 (2001). − Рр. 492–501.− Режим доступа: https://goo.gl/rK7phU
Coronado J. J. Effect of (Fe,Cr)7C3 carbide orientation on abrasion wear resistance and fracture toughness / J. J. Coronado // Wear. − 270 (2011). − Рр. 287–293. − Режим доступа: https://goo.gl/EPXsBo
Coronado J. J. Effect of load and carbide orientation on abrasive wear resistance of white cast iron / J. J. Coronado // Wear. − 270 (2011). − Рр. 823–827. − Режим доступа: https://goo.gl/dpzjBS
Чейлях А. П. Разработка и исследования новых экономно легированных износостойких чугунов с метастабильной структурой для быстроизнашивающихся деталей / А. П. Чейлях, Д. В. Клок, С. В. Прекрасный // Металл и литье Украины. – 2006. – № 9–10. – С. 13–17.
Волчок И. П. Влияние марганца на процессы структурообразования износостойких высокохромистых чугунов /
И. П. Волчок, В. В. Нетребко // Строительство, материаловедение, машиностроение. – 2012. – Вып. 64. – С. 301–304. – Режим доступа: https://goo.gl/001GyA
Чейлях А. П. Экономно легированные метастабильные сплавы и упрочняющие технологии : монография / А. П. Чейлях. – Харьков : ННЦ ХФТИ, 2003. – 236 с.
Таран Ю. Н. Бейнитное превращение в чугунах: структура, кинетика, свойства / Ю. Н. Таран, В. З. Куцова,А. Ю. Куцов и др. // Строительство, материаловедение, машиностроение. – 2004. – Вып. 27. – Ч. 1. – С. 38–61.
Bhadeshia H.K.D.H. Bainite in steels / H.K.D.H. Bhadeshia, J.W. Christian // Metall. Trans. – 1990. – 21A. – Рp. 767–770. – Режим доступа: https://goo.gl/mQZlcK
Hillert M. The nature of bainite / M. Hillert // ISIJ Intern. – 1995. – Vol. 35. – № 9. – Pр. 1134–1135. – Режим доступа: https://goo.gl/93Pml8
Куцова В. З. Структура, фазовый состав и свойства высокохромистого чугуна для композитных валков после изотермической выдержки / В. З. Куцова, А. Ю. Куцов, М. А. Ковзель и др. // Education – Investments – Research & Development : AFES2006 Davos Forum. – July 4–10, 2006. – Davos (Switzerland), 2006. – C. 82–92.
Downloads
Published
Issue
Section
License
Authors that are published in this journal agree to follow the conditions:
Authors reserve the right to the authorship of his work and cede the right to the journal of first publication of this work on conditions of the license under the Creative Commons Attribution License, which allows others to distribute it freely with the obligatory reference to the author of the original work and the first publication of the work in this journal.
