| 摘要 |
PROBLEM TO BE SOLVED: To provide a slab forging method capable of press-fitting porosity without nonuniformity over the slab total length, by uniformly thickening the slab width end part vicinity, when drafting in the width direction of a slab.SOLUTION: A slab forging method is constituted by continuously adding draft in the width direction and then in the thickness direction on, by using a vertically asymmetric anvil to a slab manufactured by continuous casting, and slab draft in the width direction is executed in two stages of reversing the slab between a first stage and a second stage, and draft of at least two times is also executed in the respective stages, and in the slab draft in the width direction in the respective stages, and it is executed by shifting a draft phase so that dislocation (ΔL) between a slab feed margin boundary in the first slab draft time and the center of the anvil contact length (B) in the next time draft time, satisfies ΔL≤0.20B in a draft position in a short length side anvil, and the respective draft ratios in the slab draft in the width direction are set to 4% or more, and the total draft ratio in the slab draft in the thickness direction is also set to 10% or more.SELECTED DRAWING: Figure 3 |
