| 摘要 |
The present invention relates to a super high steel plate having excellent welding performance and machinability and a manufacturing method thereof, more specifically, a super high steel plate having excellent welding performance and machinability and a manufacturing method thereof, capable of obtaining the welding performance and resistant performance of delayed fracture by controlling contents of austenitic stabilizing elements and increasing the generation of a twin crystal through re-roll and improving the machinability by simultaneously obtaining ductility. [Reference numerals] (AA) invention steel 3 (structure before re-rolling; particle size 10μm);(BB) invention steel 3 (structure before re-rolling; particle size 5μm) |
