公开(公告)号：EP1944098A4

公开(公告)日：2008-12-17

申请号：EP07743742

申请日：2007-05-15

申请人： NIPPON STEEL CORP

发明人： YAMAMOTO RYUJI ,  SERIZAWA YOSHIHIRO ,  OGAWA SHIGERU ,  UENO HIRONORI ,  DOKI MASAHIRO ,  NISHIYAMA YASUHIRO

IPC分类号： B21B45/02

CPC分类号： B21B45/0233 ,  B21B45/0218

摘要： A method for setting arrangement of spray nozzles in which uniform cooling is possible in the direction intersecting the threading direction perpendicularly with regard to a cooling system of a hot steel plate applied in order to obtain a uniform steel material having good shape characteristics by control-cooling a hot steel plate obtained by hot rolling while performing clamp threading by means of a clamp roll is provided. A method for setting arrangement of spray nozzles of a spray cooler having a wide quantity of water regulation range by using two kinds or more of nozzle different in quantity of water and spray region is also provided.Spray nozzles are arranged such that a value obtained by integrating the n-th power of collision pressure of cooling water spayed from the spray against the cooling surface in the threading direction between the clamp roll pairs falls within -20% of the maximum value in the threading direction, where 0.05=n=0.2.

公开(公告)号：EP1066897A4

公开(公告)日：2004-11-03

申请号：EP99959889

申请日：1999-12-17

申请人： NIPPON STEEL CORP

发明人： TANAKA SHIGENORI ,  HIGASHI TOYOICHIRO ,  DOKI MASAHIRO ,  FUKUDA JUN ,  OHBA HIROSHI ,  UCHIMURA MITSUO

IPC分类号： B22D11/115 ,  B22D11/12 ,  B22D11/00 ,  B22D11/10 ,  B22D11/128

CPC分类号： B22D11/1206 ,  B22D11/115

摘要： A continuous casting billet with a reduced center segregation, especially a high-carbon-steel continuous casting billet and a production method therefor. A continuous casting billet, wherein a branching isometric system diameter at the billet center is set to up to 6 mm. To attain that size, an in-mold electromagnetic agitation is performed to set a primary dendrite tilt angle within 10 mm of a billet surface layer to at least 10 DEG , and a light rolling is conducted during continuous casting to set a center porosity at the billet center to up to 4 mm in diameter; whereby it is possible, when producing a continuous casting billet having a carbon concentration of at least 0.6 mass% and a billet size of up to 160 mm, to provide a billet having a reduced center segregation and being less frequently subjected to wire breakage at wire drawing after wire rolling.

公开(公告)号：EP1154678A4

公开(公告)日：2006-08-30

申请号：EP00981694

申请日：2000-12-13

申请人： NIPPON STEEL CORP

发明人： KAWACHI TAKESHI ,  YAMAMURA KAZUTO ,  MITAKE HIROYUKI ,  KINOSHITA JUNICHI ,  IMANAGA KATSUHIRO ,  DOKI MASAHIRO ,  KIMURA YOSHIAKI ,  KAWABATA TERUO

IPC分类号： H05H1/26 ,  B22D11/11 ,  B22D41/015 ,  H05B7/00 ,  H05B7/18 ,  H05H1/28 ,  H05H1/34 ,  H05H1/40

CPC分类号： B22D11/11 ,  B22D41/015 ,  H05B7/00 ,  H05B7/185 ,  H05H1/28 ,  H05H1/34 ,  H05H1/40 ,  H05H2001/3421 ,  H05H2001/3478

摘要： An anode for transfer plasma heating in which a DC current is applied to melted metal in a vessel to produce an Ar plasma and heat the melted metal is characterized in that it comprises an anode which has an internal water-cooling structure and is made of conductive metal, a metallic protective element which is placed outside the anode with a certain gap therebetween and has an internal water-cooling structure, and a gas supply means for supplying an Ar-containing gas into the gap between the anode and the protective element, and the central part of the outer surface of the tip of the anode is recessed.

摘要翻译： （57）摘要：一种用于转移等离子体加热的阳极，其中将直流电流施加到容器中的熔融金属上以产生Ar等离子体并加热熔融金属，其特征在于，其包括具有内部水冷结构 并且是金属保护元件，金属保护元件放置在阳极之间，其间具有一定间隙，并具有内部水冷结构，以及气体供应装置，用于将含Ar的气体供应到阳极和 保护元件和阳极尖端的外表面的中心部分是凹入的。

公开(公告)号：EP2047921A4

公开(公告)日：2010-02-17

申请号：EP07791980

申请日：2007-07-30

申请人： NIPPON STEEL CORP

发明人： YAMAMOTO RYUJI ,  SERIZAWA YOSHIHIRO ,  OGAWA SHIGERU ,  UENO HIRONORI ,  DOKI MASAHIRO ,  NISHIYAMA YASUHIRO

IPC分类号： B21B45/02

CPC分类号： B21B45/0218 ,  B21B45/0233

公开(公告)号：EP1952913A4

公开(公告)日：2009-12-23

申请号：EP06822966

申请日：2006-10-27

申请人： NIPPON STEEL CORP

发明人： MIYAZAKI MASAFUMI ,  MATSUZAWA AKIHIRO ,  SASAI KATSUHIRO ,  OHASHI WATARU ,  OHTANI YASUHIKO ,  YAMADA KATSUNORI ,  DOKI MASAHIRO ,  HIRATA GO ,  KIMURA YOSHIAKI ,  HASEGAWA HAJIME

IPC分类号： B22D11/00 ,  B22D11/10 ,  B22D11/117 ,  C21C7/04

CPC分类号： B22D11/108 ,  B22D11/117 ,  B22D41/58 ,  C21C7/0006 ,  C21C7/068 ,  C21C7/072 ,  Y02P10/212

摘要： A method of production of an ultralow carbon cast slab characterized by adding Ti to molten steel decarburized to a carbon concentration of 0.01 mass% or less, further adding at least one of Ce, La, and Nd, and using an immersion nozzle to inject the above molten steel from a tundish to a casting mold for continuous casting while maintaining a flow rate of Ar gas blown from any location in a range from a tundish upper nozzle to discharge ports of said immersion nozzle at 3N1 (normal liter)/min or less.