| 摘要 |
PROBLEM TO BE SOLVED: To stably execute the rolling without causing cutting off of a steel material from the joined part during rolling. SOLUTION: In the method of a continuous hot-rolling after joining plural steel materials, at the time of butting, heating and joining the rear end part of the following steel material and the front end part of the preceding steel material, the temp. at the joined part and near part thereof after completing the joining is controlled in the temp. range of the following equation for >=30sec, and thereafter, the hot-rolling is executed Ar3 transformation temp. <= the temp. of the joined part and near part thereof <= the melting temp. of MnS. |
