鋼の連続鋳造方法

Japanese Patent JP6852798

B2

An object of the present invention is to provide a continuous steel casting method in which center segregation can be effectively reduced using a relatively small rolling load without the need of a facility with high rolling ability and without the occurrence of internal cracking and the porosity formation inside a strand and in which remaining porosity can be eliminated.In the continuous steel casting method of the present invention, a gap D1 between strand support rolls facing each other with a strand 6 in a rectangular shape interposed therebetween is increased toward a downstream side in a casting direction to thereby bulge the strand having an unsolidified layer 6a thereinside such that the thickness T1 between long-side surfaces of the strand 6 increases within the range of 0.1% or more and 10% or less of the thickness T2 of the strand inside a mold 5. When long-side surfaces S1 of the bulged strand 6 are rolled by a plurality of guide rolls 9, a portion of the strand in which the solid phase fraction in a central portion of the strand 6 is within the range of 0.2 or more and less than 0.9 satisfies a prescribed total rolling reduction and a prescribed reduction gradient, and a portion of the strand in which the solid phase fraction is within the range of 0.9 or more satisfies a prescribed total rolling reduction and a prescribed reduction gradient.

Keigo Sotoishi
Hiroshi Awajiya
Norimaki Aramaki
Naoki Kikuchi

JP2019544929A

March 31, 2021

February 25, 2019

Click for automatic bibliography generation  

jfe Steel Corporation

B22D11/128; B22D11/20

JP2017024079A
JP2015202510A
JP2014233726A
JP2014039940A
JP2015226918A

成田貴一ほか,ブルーム連鋳鋳片の内部割れ発生に及ぼす鋳片変形の影響,鉄と鋼,日本,社団法人日本鉄鋼協会,1981年 6月 1日,Vol.67, No.8,p.1307-1316,特に、1311ページ左欄23行~右欄8行,1313ページ右欄21~30行, 図7

Isomura Tetsuro
Akira Kumasaka
Tetsuya Sakai
Kazuhiro Mori

Previous Patent: 重ねレーザ溶接継手、重ねレーザ溶接継手の製造方法および自動車用骨格�...

Next Patent: ラジアルギャップ型回転電機及びその製造方法、回転電機用ティース片の�...