1. 1) T. Ariyama, R. Murai, J. Ishii and M. Satoh: ISIJ Int., 45 (2005), 1371.
2. 2) Y. Ono: Tetsu‑to‑Hagané, 79 (1993), N711.
3. 3) O. Ehl, F. Bordemann and P. Korte: Stahl Eisen, 107 (1987), 525.
4. 4) W. Beier, G. Gehrmann, H.-G. Mohring and H. Westerdorff: Stahl Eisen, 109 (1989), 221.
5. 5) S. Fukushima, Y. Suzukawa, T. Akiyama, Y. Kato, A. Fijibayashi and T. Toda: NKK Tech. Rev., 87 (2002), 30.