Reduction of structural inhomogeneity of 35GL alloys through modification by means of electric emission current in the process of crystallization
DOI:
https://doi.org/10.31498/2225-6733.34.2017.105544Keywords:
electro impulse treatment, steel, structure, nonmetallic inclusions, physical homogeneity, manganese carbidesAbstract
The method of a crystallizing alloy processing which makes it possible to obtain high-quality castings from 35GL steel has been considered. It has been shown that the electro impulse treatment of the melt improves the structure and reduces the physical heterogeneity of the castings. Processing of the melt with a current substantially increases the dissolution rate of metallic impurities and other components in the melt, provides a fine-grained structure, increases the homogeneity of the cast metal as well. The structural heterogeneity decreases as a result of the change in morphology and disorientation and as a result of manganese carbides grinding the size and quantity of the grain ball decrease from 7 to 8. Physical heterogeneity reduces due to the changes in the location and size of pores and nonmetallic inclusions; the content of gases and non-metallic inclusions reduces as well. In this article, studies of the modification of certain parameters by the electric impulse current, have been made. It results in a significant increase in the basic mechanical properties of the 35GL cast structural steel: the tensile strength increases by 9%, the toughness increases by 21%, and the hardness by 6% without changing the chemical composition of the steel, due to the fine grain structureReferences
Перелік використаних джерел (ГОСТ):
Иванов А.В. Электротоковая обработка жидких и кристаллизующихся сплавов в литейных технологиях / А.В. Иванов, А.В. Синчук, В.Н. Цуркин // Электронная обработка материалов. – 2011. – № 5, том 47. – С. 89-98.
Влияние наследственности на предусадочное расширение сплавов / И.Ф. Селянин [и др.] // Металлургия машиностроения. – 2005. – № 6. – С. 15-17.
Миненко, Г.Н. Об энергетическом воздействии на металлический расплав / Г.Н. Миненко // Металлургия машиностроения. – 2006. – № 3. – С. 10-12.
Миненко Г.Н. Физическая модель воздействия электрического тока на процесс кристаллизации сплава / Г.Н. Миненко, Ю.А. Смирнова // Металлургия машиностроения. – 2009. – № 3. – С. 48-49.
Воздействие электрического тока на жидкий алюминиевый сплав / В.И. Якимов [и др.] // Металлургия машиностроения. – 2003. – № 3. – С. 36-39.
Тимченко С.Л. Исследование кристаллизации сплава под действием электрического тока / С.Л. Тимченко // Расплавы. – 2011. – № 4. – С. 53-61.
Кольчурина И.Ю. Влияние внешних воздействий на микроструктуру кристаллизующе-гося сплава / И.Ю. Кольчурина, И.Ф. Селянин // Литейное производство. – 2009. – № 8. – С. 13-15.
References:
Ivanov A.V., Sinchuk A.V., Tsurkin V.N. Elektrotokovaya obrabotka zhidkih i kristallizuyuschihsya splavov v liteynyih tehnologiyah [Electro-current treatment of liquid and crystallizing alloys in foundry technologies]. Elektronnaya obrabotka materialov – Electronic material processing. 2011, no. 5, pp. 89-98. (Rus.)
Selyanin I.F, Deev V.B., Voytkov A.P. Vliyanie nasledstvennosti na predusadochnoe rasshirenie splavov [Influence of heredity on the pre-plant expansion of alloys]. Metallurgiya mashinostroeniya – Metallurgy of machine building, 2005, no. 6, pp. 15-17. (Rus.)
Minenko G.N. Ob energeticheskom vozdeystvii na metallicheskiy rasplav [On the energy impact on a metallic melt]. Metallurgiya mashinostroeniya – Metallurgy of machine building, 2006, no. 3, pp. 10-12. (Rus.)
Minenko G.N. Fizicheskaya model vozdeystviya elektricheskogo toka na protsess kristallizatsii splava [The physical model of the effect of an electric current on the crystallization process of an alloy]. Metallurgiya mashinostroeniya – Metallurgy of machine building, 2009, no. 3, pp. 48-49. (Rus.)
Yakimov V.I., Marin B.N., Zelinskiy V.V., Zapletin M.A. Vozdeystvie elektricheskogo toka na zhidkiy alyuminievyiy splav [The effect of electric current on liquid aluminum alloy]. Metallurgiya mashinostroeniya – Metallurgy of machine building, 2003, no. 3, pp. 36-39. (Rus.)
Timchenko S.L. Issledovanie kristallizatsii splava pod deystviem elektricheskogo toka [Investigation of alloy crystallization under the influence of electric current]. Rasplavyi – Melt, 2011, no. 4, pp. 53-61. (Rus.)
Kolchurina I.Y. Selyanin I.F. Vliyanie vneshnih vozdeystviy na mikrostrukturu kristallizuyuschegosya splava [The influence of external influences on the microstructure of the crystallizing alloy]. Liteynoe proizvodstvo – Foundry, 2009, no. 8, pp. 13-15. (Rus.)
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