公开(公告)号：EP3139155A4

公开(公告)日：2017-07-05

申请号：EP15818600

申请日：2015-05-14

Applicant: JFE STEEL CORP

Inventor： KINOSHIRO SATOSHI ,  INOSE MASAO

IPC: G01N21/67 ,  G01N21/73 ,  G01N33/20

CPC classification number: G01N21/67 ,  B22D11/001 ,  B22D11/108 ,  B22D11/11 ,  B22D11/16 ,  C21C7/10 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  G01N21/73 ,  G01N33/0036 ,  G01N33/203 ,  G01N33/206

Abstract: Provided are a method for analyzing nitrogen in a metal sample with which nitrogen content in a metal sample is determined accurately and at low cost, an apparatus for analyzing nitrogen in a metal sample, a method for adjusting nitrogen concentration in molten steel, and a method for manufacturing steel. The method for analyzing nitrogen in a metal sample according to the present invention includes: a melting process in which a metal sample containing a nitrogen component is melted in an argon gas atmosphere by performing impulse heating to gasify the nitrogen component; and an analyzing process in which nitrogen content in the metal sample is determined by analyzing nitrogen gas generated in the melting process and the argon gas by using a gas discharge optical emission method. By analyzing the nitrogen concentration of a sample taken from molten steel by using the analysis method described above, and by determining treatment conditions for adjusting nitrogen concentration on the basis of the nitrogen analysis value derived by the analysis, nitrogen concentration in molten steel is adjusted.

Abstract translation: 本发明提供一种分析金属试样中的氮的方法，该方法可精确且低成本地测定金属试样中的氮含量，分析金属试样中的氮的装置，调整钢水中的氮浓度的方法及方法 用于制造钢材。 根据本发明的用于分析金属样品中的氮的方法包括：熔融过程，其中通过执行脉冲加热使含有氮成分的金属样品在氩气气氛中熔融以气化氮成分; 以及通过使用气体放电光发射方法分析在熔融过程中产生的氮气和氩气来确定金属样品中的氮含量的分析过程。 通过使用上述分析方法分析从钢水取得的样品的氮浓度，并且基于通过分析得到的氮分析值确定用于调整氮浓度的处理条件，调整钢水中的氮浓度。

公开(公告)号：EP2743683A4

公开(公告)日：2014-10-22

申请号：EP12824205

申请日：2012-08-08

Applicant: JFE STEEL CORP

Inventor： KINOSHIRO SATOSHI ,  FUJIMOTO KYOKO ,  INOSE MASAO ,  ITO TOSHIYUKI

IPC: G01N21/64 ,  C21C1/02 ,  C21C7/064 ,  G01J3/44 ,  G01N1/44 ,  G01N31/12 ,  G01N33/00 ,  G01N33/20

CPC classification number: C21C1/02 ,  C21C7/064 ,  G01N21/64 ,  G01N21/643 ,  G01N33/203 ,  G01N2021/6432

公开(公告)号：EP2540867A4

公开(公告)日：2014-01-22

申请号：EP11759646

申请日：2011-03-24

Applicant: JFE STEEL CORP

Inventor： MIYAMOTO YUKA ,  SUZUKI TAKESHI ,  IWASA HIROKI ,  NAKAMURA NORIHIKO ,  INOSE MASAO ,  NORO HISATO ,  TOBIYAMA YOICHI

IPC: C23C28/02 ,  C25D3/12 ,  C25D3/30 ,  C25D5/10 ,  C25D5/12 ,  C25D5/50 ,  C25D7/00 ,  C25D9/08 ,  C25D9/10

CPC classification number: C23C28/021 ,  C21D8/0221 ,  C21D8/0278 ,  C21D9/46 ,  C23C22/50 ,  C23G1/081 ,  C25D3/02 ,  C25D3/12 ,  C25D3/20 ,  C25D3/22 ,  C25D3/30 ,  C25D3/38 ,  C25D3/54 ,  C25D5/10 ,  C25D5/12 ,  C25D5/36 ,  C25D5/50 ,  C25D5/505 ,  C25D7/00 ,  C25D9/08 ,  C25D9/10 ,  C25F1/00 ,  Y10T428/12569 ,  Y10T428/12806

Abstract: A coated steel sheet includes a corrosion-resistant coating composed of at least one layer selected from the group consisting of a Ni layer, a Sn layer, an Fe-Ni alloy layer, an Fe-Sn alloy layer, and an Fe-Ni-Sn alloy layer disposed on at least one surface of a steel sheet, and an adhesive coating disposed on the corrosion-resistant coating, the adhesive coating containing Zr and further containing at least one metal element selected from the group consisting of Co, Fe, Ni, V, Cu, Mn, and Zn, in total, at a ratio by mass of 0.01 to 10 with respect to Zr. The coated steel sheet has excellent humid resin adhesion and corrosion resistance, in which streaky surface defects do not occur. Accordingly, when the coated steel sheet is coated with a resin, it is possible to obtain a resin-coated steel sheet excellent in the properties described above. Furthermore, in a method for producing the coated steel sheet, it is not necessary to use Cr which is strictly environmentally regulated.

公开(公告)号：EP2722405A4

公开(公告)日：2015-09-30

申请号：EP12823682

申请日：2012-08-08

Applicant: JFE STEEL CORP

Inventor： KINOSHIRO SATOSHI ,  ITO TOSHIYUKI ,  KAWABATA RYO ,  ISHIGE TOSHIRO ,  FUJIMOTO KYOKO ,  INOSE MASAO

IPC: C21C7/064 ,  C21C7/00 ,  F27D19/00 ,  F27D21/00 ,  G01N21/64 ,  G01N31/00

CPC classification number: C21C7/0645 ,  C21C1/02 ,  C21C7/0006 ,  C21C7/0037 ,  C21C7/0075 ,  C21C7/0087 ,  C21C7/06 ,  C21C7/064 ,  C21C7/10 ,  C21C2007/0093 ,  C21C2300/08 ,  F27D19/00 ,  F27D21/00 ,  G01N21/64 ,  G01N21/645 ,  G01N33/0042 ,  Y02A50/248

Abstract: There are provided a method for desulfurizing molten steel, characterized in that a sample taken out from molten steel after the tapping from a converter or during the secondary refining is analyzed rapidly in a high accuracy by a method comprising a high frequency induction heating step wherein the sample is combusted and oxidized under the high frequency induction heating in a pure oxygen atmosphere to convert S in the sample into SO 2 and an analyzing step wherein SO 2 -containing gas produced in the high frequency induction heating step is analyzed through an ultraviolet fluorescence method to quantify S concentration of the sample, whereby S concentration of molten steel after the tapping from the converter can be controlled in a high accuracy to prevent failure of S concentration and also desulfurization time in the secondary refining can be shortened and the amount of the desulfurizer or the like used can be reduced, and a method of manufacturing molten steel by using such a method.

公开(公告)号：EP2692902A4

公开(公告)日：2014-09-24

申请号：EP12764994

申请日：2012-03-26

Applicant: JFE STEEL CORP

Inventor： MATSUSHIMA TOMOHIRO ,  INOSE MASAO ,  NAGOSHI MASAYASU ,  MASUOKA HIROYUKI ,  AIZAWA SHIGEYUKI ,  NORO HISATO

IPC: C23G1/00 ,  C21D8/04 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C23G1/08 ,  C23G3/00 ,  C23G3/02

CPC classification number: C23G3/027 ,  C21D8/0473 ,  C21D8/0478 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23G1/00 ,  C23G1/08 ,  C23G1/081 ,  C23G1/085 ,  C23G1/086 ,  C23G1/088 ,  C23G3/021