EFFECT OF THE STRAIN AGING DURING COLD ROLLING ON THE STRUCTURE AND PROPERTIES OF Fe – 3 % Si STEEL

Abstract. The authors have investigated the effect of annealing parameters after hot rolling and strain aging during cold rolling on the structure, texture and magnetic properties of Fe – 3 % Si steel. It is shown that after cold rolling and subsequent annealing, deformation and recrystal lization textures were more scattered while maintaining carbon in solid solution is done by selecting the annealing temperature and cooling rate of hot-rolled steel. Much better magnetic properties and improved texture of secondary recrystallization {110}<001> had steel with maximum degree of strain aging. This effect can be explained by the infl uence of carbon on the shear bands formation in cold rolling grains with {111}<112> orientation.

1. Günther K., Abbruzzese G., Fortunati S., Ligi G. Recent Technology Developments in the Production of Grain-oriented Electrical Steel // Steel research int. 2005. Vol. 76. No. 6. P. 413 – 421.

2. Xia Z., Kang Y., Wang Q. Developments in the production of grainoriented electrical steel // Journal of Magnetism and Magnetic Materials. 2008. Vol. 254 – 255. Р. 307 – 314.

3. Takahashi N., Harase J. Recent Development of Technology of Grain Oriented Silicon Steel // Proc. Mater. Science Forum. 1996. Vol. 204 – 206. Р. 143 – 145.

4. Лобанов М.Л., Русаков Г.М., Редикульцев А.А. Электротехническая анизотропная сталь. Часть I. История развития // МиТОМ. 2011. № 7. С. 18 – 25. Lobanov M.L., Rusakov G.M., Redikul’tsev A.A. Electrotechnical anisotropic steel. Part 1. History of development. Metal Science and Heat Treatment, 2011, Vol. 53, no. 7–8, pp. 326–332.

5. Лобанов М.Л., Русаков Г.М., Редикульцев А.А. Электротехническая анизотропная сталь. Часть II. Cовременное состояние // МиТОМ. 2011. № 8. С. 3 – 7. Lobanov M.L., Rusakov G.M., Redikul’tsev A.A. Electrotechnical anisotropic steels. Part II. State-of-the-Art. Metal Science and Heat Treatment, 2011, Vol. 53, no. 7–8, pp. 355–359.

6. Pat. 1965559 USА. Electrical sheet and method and apparatus for its manufacture and test / Goss N.P. Application August 7, 1933.

7. Hyung-Ki Park, Chang-Soo Park, Tae-Wook Na etc. Irregular or Smooth Grain Boundaries Evolved after Secondary Recyrstallization of Fe – 3% Si Steel // Materials Transactions. 2012. Vol. 53. No. 4. P. 658 – 661.

8. Leslie M.C., Rickett R.L., Stroble C.P. The Microstructure of Low-Carbon 3,25 % Silicon Steel // Trans. ASM. 1961. Vol. 53. P. 715 – 734.

9. Shimizu Y., Ito Y., Iida Y. Formation of the Goss Orientation near the Surface of 3 Pct Silicon Steel during Hot Rolling // Metallurgical Transactions A. 1986. Vol. 17A. No. 8. P. 1323 – 1334.

10. Смирнов С.В., Урицкий А.Г., Редикульцев А.А. и др. Формирование структуры и текстуры по ширине полосы ферритной стали при горячей прокатке // Изв. вуз. Черная металлургия. 2014. № 10. С. 42 – 46. Uritskii A.G., Redikul’tsev A.A., Smirnov S.V., Lobanov M.L., and Rusakov G.M. Structure and texture formation over the width of ferrite steel strip in hot rolling. Steel in Translation. 2014. Vol. 44, no. 10, pp. 723–726.

11. Вишняков Я.Д., Бабарэко. А.А. Теория образования текстур в металлах и сплавах. – М.: Наука, 1979. – 343 с. Vishnyakov Ya.D., Babareko A.A. Teoriya obrazovaniya tekstur v metallakh i splavakh [Theory of Texture Formation in Metals and Alloys]. Moscow: Nauka, 1979. 343 p. (In Russ.).

12. Matsuo M., Sakai Т., Suga Y. Origin and Development of Throughthe-Thickness Variations of Texture in the Processing of Grain-Oriented Silicon Steel // Metallurgical Transactions A. 1986. Vol. 17A. No. 8. P. 1313 – 1322.

13. Ushioda K., Hutchinson W.B. Role of Shear Bands in Annealing Texture Formation in 3 % Si – Fe (111)[11 ] Single Crystals // ISIJ Int. 1989. Vol. 29. P. 862 – 867.

14. Dorner D., Zaefferer S., Raabe D. Retention of the Goss orientation between microbands during cold rolling of an Fe – 3 % Si single crystal // Acta mater. 2007. Vol. 55. No. 7. P. 2519 – 2530.

15. Dorner D., Adachi Y., Tsuzaki K., Zaefferer S. Tracing the Goss Orientation during Deformation and Annealing of an FeSi Single Crystal // Materials Science Forum. 2007. Vol. 550. Р. 485 – 490.

16. Dillamore I.L., Roberts J.G., Bush A.C. Occurrence of shear bonds in heavily rolled cubic metals // Mater. Sci. 1979. Vol. 13. P. 73 – 77.