MOLD FOR CONTINUOUS CASTING AND CONTINUOUS CASTING METHOD FOR STEEL

• Main Authors: YUMOTO ATSUSHI, YAMAZAKI NORIKIMI, TAKAYA MAKOTO, MURAKAMI TOSHIHIKO, KATO YUICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 28.04.2022
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

To secure solidification uniformity in molten steel and suppress corner cracking in a cast slab.SOLUTION: A mold for continuous casting to be used in a continuous casting facility where steel is continuously casted includes: a pair of long side copper plates; and a pair of short side copper plates that is held between the pair of long side copper plates, and that is movable along a long side direction of the long side copper plates. The short side copper plate has: two or more gradients differing in a casting direction so that a plurality of tapered parts is formed on an internal surface side of the mold to be supplied with molten steel; and protrusions extending in the casting direction, at both ends in a short side direction on the internal surface side. A tapering rate of the tapered parts at the uppermost stream side in the casting direction is 1.1%/m-3.5%/m. In a plan view of the mold, the protrusion is formed such that a length of a contact part contacting the molten steel is shorter than a sum of a short side direction length and a long side direction length of the mold, and a difference thereof is 3 mm or more.SELECTED DRAWING: Figure 5 【課題】溶鋼の凝固の均一性を担保し、鋳片のコーナー割れを抑制する。【解決手段】鋼を連続鋳造する連続鋳造設備において用いられる連続鋳造用鋳型であって、一対の長辺銅板と、一対の長辺銅板によって挟み込み、長辺銅板の長辺方向に沿って移動可能な一対の短辺銅板と、を備え、短辺銅板は、溶鋼が供給される鋳型の内面側に複数のテーパー部が形成されるように、鋳造方向に異なる２以上の勾配を有し、内面側の短辺方向の両端部分に、鋳造方向に延設された突出部を有しており、鋳造方向最上流側のテーパー部のテーパー率は、１．１％／ｍ以上３．５％／ｍ以下であり、突出部は、鋳型を平面視して、溶鋼と接触する接触部の長さが、鋳型の短辺方向長さ及び長辺方向長さの和よりも短く、かつ、その差が３ｍｍ以上となるように形成される。【選択図】図５