| Title |
Electronic, Magnetic & Optical Materials : Analysis of Grain Growth and Magnetic Properties in IF Steel after Strain Annealing |
| Authors |
안성권(Sung Kwon An); 최장현(Jang Hyun Choi); 정원섭(Won Sup Jeong) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Permeability; Coercivity; Texture; Strain annealing; Grain coarsening; SIGM |
| Abstract |
The effects of the grain size on the magnetic properties in IF steel after strain annealing were investigated. A 92.5% cold rolled and annealed IF steel sheet was temper rolled by 0.4% reduction in thickness and subsequently strain annealed at the temperature ranging between 670℃ and 950℃ 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 increased and coercivity decreased with the increase of grain size. The optimum magnetic properties was achieved after strain annealing at 850℃ for 30 min. Under this condition, the coercivity was measured to be 0.6Oe and the maximum permeability was 13000, also sound that the optimum grain size was 83 μm. |