| 摘要 |
<p>PURPOSE:To restrain warpage by reversely rolling only the rear end part of a material to be rolled at a specified draft successively after executing the final rolling pass of a target thickness in the hot rolling of a thick steel plate. CONSTITUTION:When the thick steel plate is hot rolled with a reversing mill, after the final pass rolling for making the material to be rolled into the target thickness is executed, successively this material to be rolled is made to move reversely and only the rolled rear end part where warpage due to the final pass rolling is present is rolled at a small draft of 0.3-5%. In this way, the warpage at rolled end part can be restrained and the danger of generating failure on the ensuing process can be prevented without providing a special device on the rolling mill in use and only by changing the rolling condition by a conventional method.</p> |
