Browse > Article

Effects of Strain Annealing Grain Size on the Magnetic Properties of Extra-Low Carbon Steel  

An, S.K. (Dept. of Metallurgical Engineering, Pusan National University)
Jeong, W.S. (Dept. of Metallurgical Engineering, Pusan National University)
Park, J.U. (Div. of Advanced Materials Engineering, Kongju National University, College of Engineering)
Publication Information
Journal of the Korean Society for Heat Treatment / v.19, no.4, 2006 , pp. 208-218 More about this Journal
Abstract
The effects of the grain size on the magnetic properties in extra-low carbon steel after strain annealing were investigated. Two kinds of sample were prepared. One is the annealed sheet, which was annealed at $670^{\circ}C$ and $850^{\circ}C$ for various time periods after cold rolling. The other is the strain annealed sheet, which was temper rolled by 0.4% and subsequently strain annealed at the temperature ranging between $670^{\circ}C$ and $850^{\circ}C$ for various time periods. The grains after strain annealing became more coarse than those after primary annealing. The grains were coarsened due to the strain induced grain boundary migration (SIGM). It was found that the permeability tended to be increased and coercivity tended to be decreased with the increase of grain size. The optimum magnetic properties was achieved after strain annealing at $850^{\circ}C$ for 30 minites. Under this condition, the coercivity was measured to be 0.6 and the permeability was measured up to be 13000.
Keywords
Permeability; Coercivity; Texture; Strain annealing; Grain coarsening; Strain induced grain boundary migration (SIGM);
Citations & Related Records
연도 인용수 순위
  • Reference
1 S. Tsunematsu and Y. Yamanaka: Sumitomo Metal, 48 (1996) 45
2 G. Kim, K. Kim, and O. Kwon: POSCO research report, 97P025 (1998)
3 M. Shimanaka, Y. Ito, T. Irie, K. Matsumura, H. Nakamura and Y. Shono: Energy Efficient Electrical Steel, Proc. TMS-AIME, A. R. Marder and E. T. Stephenson(Ed.)(1980) 193
4 C. R. Austin, L. A. Luini and R. W. Lindsay: Trans. ASM. 35 (1945) 446
5 S. K, An, S. -H, Hong,J. -H, Choi and W. -S, Chung, J. Kor. Inst. Met. & Mater., 40(8) (2002) 903
6 G. Kim, K. Kim and O. Kwon: Inter. Symp. Modern LC and ULC Sheet Steels for Cold Forming: Processing and Properties, W. Bleck (ed.), RWTH Aachen, Aachen (1988) 479
7 S. -H. Hong, S. K. An, J. H. Choi and D. N. Lee: Rex and GG, Aachen, G. Gottstein and D.A. Molodov (ed.), RWTH Aachen, Aachen (2001) 1101
8 V. Randle: Microtexture Determination and Its Application, Inst. Mat., Bourne Press, Bournemouth, Great Britain (1992)
9 W. B. Hutchinson: Inter. Met. Rev., 29 (1984) 25
10 U. von Schlippenbach, F. Emren and K. Lucke: Acta Metall., 34 (1986) 1289   DOI   ScienceOn
11 C. S. Barrett: Trans. AIME., 137 (1940) 128
12 T. Sakai, Y. Saito, K. Hirano and K. Kato: Trans. ISIJ, 28 (1988) 1028   DOI
13 W. L. Roberts: Iron and Steel Engineer, (1972) 56
14 K. Lucke and M. Holscher: Texture and Microstruct., 14-18 (1991) 585
15 J. S, Woo, and C. S, Lee: J. Kor. Inst. Metals, 28(2) (1990) 179
16 R. R. Judd and Blazek: Energy Efficient Electrical Steel, Proc. TMS-AIME, A. R. Marder and E. T. Stephenson(Ed.) (1980) 147
17 H. Nakae and H. Yamamura: J JIM, 32 (1968) 130