EP 3488947 B1 20200819 - CONTINUOUS STEEL CASTING METHOD
Title (en)
CONTINUOUS STEEL CASTING METHOD
Title (de)
VERFAHREN ZUM KONTINUIERLICHEN STAHLGIESSEN
Title (fr)
PROCÉDÉ DE COULÉE CONTINUE D'ACIER
Publication
Application
Priority
- JP 2016183726 A 20160921
- JP 2017009906 W 20170313
- JP 2017033955 W 20170920
Abstract (en)
[origin: EP3488947A1] Surface cracking caused by nonuniform cooling of a solidifying shell at the initial stage of solidification is prevented, and the occurrence of center segregation in a thicknesswise central portion of a strand is reduced.Metal-filled portions with different thermal conductivity filled with a metal having a thermal conductivity that differs by at least 20% from the thermal conductivity of a mold copper plate of a continuous casting mold are disposed on an inner wall surface of the mold copper plate in a region extending from a position at least 20 mm above the position of a meniscus to a position at least 50 mm and at most 200 mm below the position of the meniscus. The area fraction of the total area of the metal-filled portions with different thermal conductivity relative to the area of the inner wall surface on which the plurality of metal-filled portions with different thermal conductivity are disposed is from 10% to 80% inclusive. A distance (D1) and an oscillation mark pitch (OMP) that is derived from the frequency of oscillation (f) and a casting speed (Vc) satisfy formula (1) below, and a distance (D2) satisfies formula (2) below.In formula (2), r is the radius (mm) of a circle having a center at the center of gravity of one of the metal-filled portions with different thermal conductivity and having the same area as the one of the metal-filled portions with different thermal conductivity.
IPC 8 full level
B22D 11/04 (2006.01); B22D 11/059 (2006.01); B22D 11/128 (2006.01); B22D 11/16 (2006.01); B22D 11/20 (2006.01)
CPC (source: EP KR)
B22D 11/051 (2013.01 - EP); B22D 11/055 (2013.01 - EP); B22D 11/059 (2013.01 - EP KR); B22D 11/128 (2013.01 - EP KR); B22D 11/16 (2013.01 - EP); B22D 11/20 (2013.01 - EP KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3488947 A1 20190529; EP 3488947 A4 20190821; EP 3488947 B1 20200819; BR 112019004155 A2 20190528; BR 112019004155 B1 20230411; JP 6947737 B2 20211013; JP WO2018056322 A1 20191017; KR 102245010 B1 20210426; KR 20190029757 A 20190320; TW 201813739 A 20180416; TW 201813740 A 20180416; TW I630961 B 20180801; TW I655979 B 20190411; WO 2018055799 A1 20180329
DOCDB simple family (application)
EP 17853092 A 20170920; BR 112019004155 A 20170920; JP 2017009906 W 20170313; JP 2018540270 A 20170920; KR 20197006411 A 20170920; TW 106109179 A 20170320; TW 106132381 A 20170921