The influence of multi-axis isothermal forging on structure and properties of low carbon steel 12GBA

S.N. Sergeev1, I.M. Safarov1, A.V. Korznikov1, R.M. Galeyev1, S.V. Gladkovsky2, E.M. Borodin2
1Institute for Metals Superplasticity Problems RAS, Khalturin St. 39, 450001 Ufa
2Institute of Engineering Science of the Urals Branch RAS, Komsomolskaya St. 34, 620049 Yekaterinburg
Abstract
The submicrocryctalline structure of the low carbon steel 12GBA was processed by multi-axis isothermal forging. The average size of grain was equal to 0,3 microns. The submicrocryctalline state of steel has three times higher strength than the initial coarse-grained state and allowable ductility and impact strength at once. Subsequent annealing lead to slight lowering strength and rising ductility. It is shown the submi-crocryctalline state of steel 12GBA has higher impact strength than the coarse-grained state at negative temperatures.
Received: 11 May 2012   Revised: 25 May 2012   Accepted: 14 June 2012
Views: 61   Downloads: 10
References
1.
N.I. Noskova, R.R. Mulyukov. Submicrocryctalline andNanocrystalline Metals and Alloys. Ekaterinburg. UralDiv. RAS (2003), 279 p. (in Russian) [Носкова Н. И.,Мулюков Р.Р Субмикрокристаллические и нанокри-сталлические металлы и сплавы. Екатеринбург: УрОРАН, 2003. 279 с].
2.
I.M. Safarov, A.V. Korznikov, R.Z. Valiev, B.M. Bronfin,A.A. Emel`yanov, D.V. Laptenok. The Physics of Metalsand Metallography. 73, 303 (1992) (in Russian) [СафаровИ.М., Корзников А.В., Валиев Р.З., Бронфин Б.М.,Емельянов А.А., Лаптенок Д.В. ФММ. 3, 123 (1992)].
3.
I.M. Safarov, R.M. Galeev, S.N. Sergeev, A.V. Korznikov.Journal of Advanced Materials 12, 423 (2011) (in Russian)[Сафаров И.М., Галеев Р.М., Сергеев С.Н., КорзниковА.В. Перспективные материалы. 12, 423 (2011)].
4.
Y.I. Matrosov, D.A. Litvinenko, S.A. Golovanenko. Steel forpipelines. Moscow. Metallurgy. (1989), 288 p. (in Russian)[Матросов Ю.И., Литвиненко Д.А., Голованенко С.А.Сталь для магистральных трубопроводов. – М.:Металлургия. 1989, 288 с].
5.
V.S. Zolotarevskiy. Mechanical properties of metals.Moscow. Metallurgy. (1983), 351 p. (in Russian)[Золотаревский В.С. Механические свойстваметаллов. М.: Металлургия. 1983, 351 с].
6.
S.S. Gorelik, S.V. Dobatkin, L.M. Kaputkin. Recrystallizationof metals and alloys. Moscow: MISIS. (2005) 423 p. (inRussian) [Горелик С.С., Добаткин С.В., Капуткин Л.М.Рекристаллизация металлов и сплавов. М.: МИСИС(2005) 432 с].
7.
V.V. Rybin. The Large Plastic Deformations and Fractureof Metals. Moscow: Metallurgy (1986) 224 p. (in Russian)[Рыбин В.В. Большие пластические деформации иразрушение металлов. М.: Металлургия (1986) 224 с].
8.
A.V. Korznikov, I.M. Safarov, A.A. Nazarov, R.Z. Valiev.Mater. Sci. Eng. A 206, 39 (1996).