| 摘要 |
PROBLEM TO BE SOLVED: To reduce the cost of rolling equipment by decreasing the number of passes in the finishing stage of rolling and to stably obtain high dimensional accuracy products having a large aspect ratio even when highly accurate calibers are not formed on the roll surface. SOLUTION: A steel bar 1 is rolled into a flat-shaped cross section with a 2-roll mill 3 and then the steel bar 1 having the flat-shaped cross section is rolled into a rectangular cross section whose longitudinal and lateral sizes are different.
|
