This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Production and Quality of Hot-Rolled Steel Sheets with Excellent Formability
Annotation ability available
Sector:
Language:
English
Abstract
Hot rolled steel sheets having tensile strength of about 300MPa with excellent press formability have been developed by using RH-degassing process and hot rolling technology. The basic chemical composition of new steel is chosen as extra low carbon, low manganese and low nitrogen to improve ductility. In addition, controlled cooling on runout table or micro-alloying of niobium is applied to prevent the grain coarsening, which is caused by leaner compositions.
These steel sheets have high elongation and excellent press formability. Furthermore, these steel sheets exhibit a high resistance to cold-work embrittlement. These properties are compared with those of DQ grade mild steel sheets and interstitial free steel sheets.
In this paper, the metallurgical basis of these new steel sheets and their characteristics are described.
Authors
Citation
Mitsuji, H., Shimomura, T., Araki, K., and Watanabe, K., "Production and Quality of Hot-Rolled Steel Sheets with Excellent Formability," SAE Technical Paper 850119, 1985, https://doi.org/10.4271/850119.Also In
References
- Goss N. P. Trans. ASM 45 1953
- Tate M. Muroga O. Araki K. Inoue I. Takahashi M. Watanabe K. “Development of continuously cast steel for common use as flat rolled products.” Nippon kokan Technical Report overseas, No. 35 1982
- Sakoh M. Araki K. Muroga O. Tate M. “Production and Mechanical Properties of Continuously Cast Low - Al - Low Al Sheet Steels,” AIME, Annual Meeting of TMS, No. A83-29 1983
- Suda T. Tayama K. Sokoh M. Araki K. Wada M. Kajitani H. “Improvement of resistance to brittle fracture in extra low carbon niobium stabilized steel after press forming” Tetsu-To-Hagane 69 13 1983
- Ito Y. Nakazawa M, Nakazato Y. Ohashi N. “Deep-drawing Quality Hot Rolled Steel Sheet KFN,” Kawasaki Steel Corporation Technical Report 5 2 1973
- Okita T. Niikura M. Nakaoka K. Ouchi C. Kozasu I. “Controlling factors of ferrite grain size in hot-rolled ultra low C steel,” Tetsu-To-Hagane 70 5 1984
- Konishi M. Nishida M. Ohashi N. “Brittle Fracture of Steel Sheets after Press Forming,” The 8th Biennial IDDRG Congress Paper 1974