公开(公告)号：CA2601497C

公开(公告)日：2012-12-18

申请号：CA2601497

申请日：2006-03-31

Applicant: JFE STEEL CORP

Inventor： NAKAGAITO TATSUYA ,  FUTATSUKA TAKAYUKI ,  MATSUDA HIROSHI ,  AWAJIYA YUTAKA ,  NAGATAKI YASUNOBU

IPC: C22C38/06 ,  C21D9/46 ,  C22C38/04 ,  C22C38/12 ,  C22C38/18 ,  C23C2/02 ,  C23C2/28

Abstract: A galvannealed steel sheet contains, by % by mass, 0.05 to 0.25% of C, 2.0% or less of Si, 1 to 3% of Mn, 0.1% or less of P, 0.01% or less of S, 0.3 to 2% of Al, less than 0.005% of N, 1% or less of Cr, 1% or less of V, 1% or less of Mo, less than 0.005% of Ti, and less than 0.005% of Nb, and satisfies the relations, Si + Al >= 0.6% and Cr + V + Mo = 0.1 to 2%, the balance being Fe and inevitable impurities.

公开(公告)号：CA2600701C

公开(公告)日：2012-05-22

申请号：CA2600701

申请日：2006-03-31

Applicant: JFE STEEL CORP

Inventor： FUTATSUKA TAKAYUKI ,  NAKAGAITO TATSUYA ,  MATSUDA HIROSHI ,  NAGATAKI YASUNOBU ,  AWAJIYA YUTAKA

IPC: C22C38/06 ,  C21D8/02 ,  C21D9/46 ,  C22C38/04 ,  C23C2/40

Abstract: Disclosed is an alloyed hot-dip galvanized steel sheet which has a chemical composition consisting of 0.05-0.25 wt% of C, not more than 0.5 wt% of Si, 1-3 wt% of Mn, not more than 0.1 wt% of P, not more than 0.01 wt% of S, 0.1-2 wt% of Al, less than 0.005 wt% of N, and the balance of Fe and unavoidable impurities, while satisfying Si + Al >= 0.6 wt%, (0.0006 ~ Al) wt%

公开(公告)号：AT482039T

公开(公告)日：2010-10-15

申请号：AT01274217

申请日：2001-11-29

Applicant: JFE STEEL CORP

Inventor： IIZUKA YUKINORI ,  AWAJIYA YUTAKA ,  NAKADA MASAYUKI ,  SUZUKI MAKOTO ,  TSUTSUMI KOICHI

IPC: B22D11/16 ,  G01B17/00 ,  B22D11/20 ,  B22D11/22 ,  G01N29/24 ,  G01N29/34 ,  G01N29/50

Abstract: A manufacturing method for a continuously cast product of steel comprising the steps of: detecting a position of crater end of product by using a method for measuring a solidification state of continuously cast product by a sensor arranged so as to be in non-contact with said product; and controlling at least one condition selected from the conditions of the casting speed and the quantity of secondary cooling water based on said detected position of crater end, said method for measuring a solidification state of continuously cast product comprising the steps of: transmitting transverse waves of burst-like electromagnetic ultrasonic waves, in which at least one selected from frequency, amplitude, and phase is modulated within a pulse width that has a magnitude of 50 to 150 % of the maximum time width not exceeding a time of flight for propagating in said product, to said product as a transmitting signal; receiving a signal after said transmitting signal propagates in said product as a receiving signal; and judging the solidification state of said product by performing correlation operation of said receiving signal by using a reference signal of a waveform that is the same as or similar to said transmitting signal.

公开(公告)号：DE60143116D1

公开(公告)日：2010-11-04

申请号：DE60143116

申请日：2001-11-29

Applicant: JFE STEEL CORP

Inventor： IIZUKA YUKINORI ,  AWAJIYA YUTAKA ,  NAKADA MASAYUKI ,  SUZUKI MAKOTO ,  TSUTSUMI KOICHI

IPC: B22D11/16 ,  G01B17/00 ,  B22D11/20 ,  B22D11/22 ,  G01N29/24 ,  G01N29/34 ,  G01N29/50

公开(公告)号：CA2601497A1

公开(公告)日：2006-10-05

申请号：CA2601497

申请日：2006-03-31

Applicant: JFE STEEL CORP

Inventor： NAKAGAITO TATSUYA ,  NAGATAKI YASUNOBU ,  AWAJIYA YUTAKA ,  FUTATSUKA TAKAYUKI ,  MATSUDA HIROSHI

IPC: C22C38/00 ,  C21D9/46 ,  C23C2/28

公开(公告)号：CA2600701A1

公开(公告)日：2006-10-05

申请号：CA2600701

申请日：2006-03-31

Applicant: JFE STEEL CORP

Inventor： MATSUDA HIROSHI ,  NAGATAKI YASUNOBU ,  NAKAGAITO TATSUYA ,  FUTATSUKA TAKAYUKI ,  AWAJIYA YUTAKA

IPC: C22C38/00 ,  C21D9/46 ,  C23C2/06

公开(公告)号：AT482037T

公开(公告)日：2010-10-15

申请号：AT07020419

申请日：2001-11-29

Applicant: JFE STEEL CORP

Inventor： IIZUKA YUKINORI ,  AWAJIYA YUTAKA ,  NAKADA MASAYUKI ,  SUZUKI MAKOTO ,  TSUTSUMI KOICHI

IPC: B22D11/06 ,  G01B17/00 ,  B22D11/16 ,  B22D11/20 ,  B22D11/22 ,  G01N29/24 ,  G01N29/34 ,  G01N29/50

Abstract: A manufacturing method for a continuously cast product of steel comprising the steps of: detecting a position of crater end of product by using a method for measuring a solidification state of continuously cast product by a sensor arranged so as to be in non-contact with said product; and controlling at least one condition selected from the conditions of the casting speed and the quantity of secondary cooling water based on said detected position of crater end, said method for measuring a solidification state of continuously cast product comprising the steps of: transmitting transverse waves of burst-like electromagnetic ultrasonic waves, in which at least one selected from frequency, amplitude, and phase is modulated within a pulse width that has a magnitude of 50 to 150 % of the maximum time width not exceeding a time of flight for propagating in said product, to said product as a transmitting signal; receiving a signal after said transmitting signal propagates in said product as a receiving signal; and judging the solidification state of said product by performing correlation operation of said receiving signal by using a reference signal of a waveform that is the same as or similar to said transmitting signal.

公开(公告)号：DE60132389T2

公开(公告)日：2009-02-19

申请号：DE60132389

申请日：2001-11-29

Applicant: JFE STEEL CORP

Inventor： IIZUKA YUKINORI ,  AWAJIYA YUTAKA ,  NAKADA MASAYUKI ,  SUZUKI MAKOTO ,  TSUTSUMI KOICHI

IPC: B22D11/06 ,  G01B17/00 ,  B22D11/16 ,  B22D11/20 ,  B22D11/22 ,  G01N29/24 ,  G01N29/34 ,  G01N29/50

Abstract: A manufacturing method for a continuously cast product of steel comprising the steps of: detecting a position of crater end of product by using a method for measuring a solidification state of continuously cast product by a sensor arranged so as to be in non-contact with said product; and controlling at least one condition selected from the conditions of the casting speed and the quantity of secondary cooling water based on said detected position of crater end, said method for measuring a solidification state of continuously cast product comprising the steps of: transmitting transverse waves of burst-like electromagnetic ultrasonic waves, in which at least one selected from frequency, amplitude, and phase is modulated within a pulse width that has a magnitude of 50 to 150 % of the maximum time width not exceeding a time of flight for propagating in said product, to said product as a transmitting signal; receiving a signal after said transmitting signal propagates in said product as a receiving signal; and judging the solidification state of said product by performing correlation operation of said receiving signal by using a reference signal of a waveform that is the same as or similar to said transmitting signal.

公开(公告)号：AT383215T

公开(公告)日：2008-01-15

申请号：AT06001406

申请日：2001-11-29

Applicant: JFE STEEL CORP

Inventor： IIZUKA YUKINORI ,  AWAJIYA YUTAKA ,  NAKADA MASAYUKI ,  SUZUKI MAKOTO ,  TSUTSUMI KOICHI

IPC: B22D11/06 ,  G01B17/00 ,  B22D11/16 ,  B22D11/20 ,  B22D11/22 ,  G01N29/24 ,  G01N29/34 ,  G01N29/50

Abstract: A manufacturing method for a continuously cast product of steel comprising the steps of: detecting a position of crater end of product by using a method for measuring a solidification state of continuously cast product by a sensor arranged so as to be in non-contact with said product; and controlling at least one condition selected from the conditions of the casting speed and the quantity of secondary cooling water based on said detected position of crater end, said method for measuring a solidification state of continuously cast product comprising the steps of: transmitting transverse waves of burst-like electromagnetic ultrasonic waves, in which at least one selected from frequency, amplitude, and phase is modulated within a pulse width that has a magnitude of 50 to 150 % of the maximum time width not exceeding a time of flight for propagating in said product, to said product as a transmitting signal; receiving a signal after said transmitting signal propagates in said product as a receiving signal; and judging the solidification state of said product by performing correlation operation of said receiving signal by using a reference signal of a waveform that is the same as or similar to said transmitting signal.

公开(公告)号：BRPI0111910B1

公开(公告)日：2016-07-26

申请号：BR0111910

申请日：2001-11-29

Applicant: JFE ENG CORP ,  JFE STEEL CORP ,  NIPPON KOKAN KK

Inventor： TSUTSUMI KOICHI ,  SUZUKI MAKOTO ,  NAKADA MASAYUKI ,  ILZUKA YUKINORI ,  AWAJIYA YUTAKA

IPC: B22D11/16 ,  G01B17/00 ,  B22D11/20 ,  B22D11/22 ,  G01N29/07 ,  G01N29/24 ,  G01N29/34 ,  G01N29/50

Abstract: "método de produção para lingotamento contínuo de produto de aço". a presente invenção refere-se a um método de produção para um produto de aço lingotado continuamente compreendendo as etapas de: detectar a posição da extremidade de cratera do produto por um método para medição do estado de solidificação do produto lingotado continuamente usando-se um sensor colocado de forma a não estar em contato com o produto; e controlar pelo menos uma condição selecionada entre as condições de velocidade do lingotamento e da quantidade de água do resfriamento secundário com base na posição detectada da extremidade de cratera, o método para a medição do estado de solidificação do produto lingotado continuamente compreendendo as etapas de: resfriar o produto até que uma porção de sua camada de superfície seja transformada; transmitir ondas transversais das ondas ultra-sônicas eletromagnéticas para o produto resfriado; receber o sinal após o sinal de transmissão ter-se propagado no produto; e julgar o estado de solidificação do produto com base no sinal recebido.