| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.42 ( May 2000 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Cold Rolled Steel Sheets with Ultra High
Lankford Value and Excellent Press Formability Keiji Nishimura, Hidetaka Kawabe, Yoshimitsu Fukui |
| Synopsis: It is well known from laboratory experiments that lubricated ferrite rolling in hot-rolling is effective in developing {111} texture. In order to apply this metallurgical principle to an actual industrial mill, Kawasaki Steel developed an endless hot-rolling process at Chiba Works, making it possible to employ heavily lubricated hot-rolling over the full length of a hot strip with stable operation. With the application of a hot strip having {111} texture obtained in this manner, an extremely high Lankford value (r-value) of 3.0 is achieved after cold-rolling and annealing. The newly developed steel sheet shows excellent drawability compared with conventional EDDQ steels. The new steel is expected to be used mainly in automotive parts which are subject to complex and heavy press deformation. |
| TextiPDF: 4P/197kbj |