Global Patent Index - EP 1262571 A1

EP 1262571 A1 2002-12-04 - STEEL HAVING WELD HEAT-AFFECTED ZONE EXCELLENT IN TOUGHNESS

Title (en)

STEEL HAVING WELD HEAT-AFFECTED ZONE EXCELLENT IN TOUGHNESS

Title (de)

STAHL MIT DURCH SCHWEISSEN BEEINFLUSSTER ZONE MIT AUSGEZEICHNETER ZÄHIGKEIT

Title (fr)

ACIER A ZONE AFFECTEE THERMIQUEMENT PAR SOUDAGE PRESENTANT UNE EXCELLENTE TENACITE

Publication

EP 1262571 A1 (EN)

Application

EP 00974966 A

Priority

  • JP 0007999 W
  • JP 2000033241 A
  • JP 2000033242 A
  • JP 2000068210 A

Abstract (en)

The present invention realizes excellent HAZ toughness by further suppressing the coarsening of austenite grains when they are heated for a long time at a high temperature in order to remarkably improve HAZ properties. The present invention is a steel excellent in the toughness of a weld heat-affected zone: having a specific chemical composition; satisfying the expression 0 </= EN </= 0.002 regarding the EN value expressed by an equivalent equation comprising (%N), (%Ti) and (%B); and containing oxide particles 0.005 to 2.0 mu m, preferably 0.1 to 2.0 mu m, in circle-equivalent diameter, which oxide particles contain at least Ca, Al and O in their composition and, in the mass percentage of the elements excluding O, contain Ca at 5% or more and Al at 5% or more with the balance consisting of other deoxidizing elements and/or unavoidable impurities, with the density of the oxide particles being 100 to 3,000 pieces/mm<2>. <IMAGE>

IPC 1-7 (main, further and additional classification)

C22C 38/00

IPC 8 full level (invention and additional information)

C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/14 (2006.01)

CPC (invention and additional information)

C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/14 (2013.01)

Designated contracting state (EPC)

DE FR

EPO simple patent family

EP 1262571 A1 20021204; EP 1262571 A4 20030326; EP 1262571 B1 20050810; DE 60021919 D1 20050915; DE 60021919 T2 20060608; DE 60033070 D1 20070308; DE 60033070 T2 20070531; EP 1520912 A2 20050406; EP 1520912 A3 20050427; EP 1520912 B1 20070117; WO 0159167 A1 20010816

INPADOC legal status


2018-01-31 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20171012

- Year of fee payment: 18

2018-01-31 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20171108

- Year of fee payment: 18

2017-10-12 [REG FR PLFP] FEE PAYMENT

- Year of fee payment: 18

2016-10-14 [REG FR PLFP] FEE PAYMENT

- Year of fee payment: 17

2015-10-08 [REG FR PLFP] FEE PAYMENT

- Year of fee payment: 16

2013-12-13 [REG FR CA] CHANGE OF ADDRESS

- Effective date: 20130913

2013-12-13 [REG FR CD] CHANGE OF NAME OR COMPANY NAME

- Owner name: NIPPON STEEL & SUMITOMO METAL CORPORATION, JP

- Effective date: 20130913

2013-04-18 [REG DE R081] CHANGE OF APPLICANT/PATENTEE

- Owner name: NIPPON STEEL & SUMITOMO METAL CORPORATION, JP

- Free text: FORMER OWNER: NIPPON STEEL CORP., TOKIO/TOKYO, JP

- Document: DE 60021919

- Effective date: 20130227

2013-04-18 [REG DE R082] CHANGE OF REPRESENTATIVE

- Document: DE 60021919

- Representative's name: VOSSIUS & PARTNER, DE

- Effective date: 20130227

2013-04-18 [REG DE R082] CHANGE OF REPRESENTATIVE

- Document: DE 60021919

- Representative's name: VOSSIUS & PARTNER PATENTANWAELTE RECHTSANWAELT, DE

- Effective date: 20130227

2006-07-19 [26N] NO OPPOSITION FILED

- Effective date: 20060511

2006-04-21 [ET] FR: TRANSLATION FILED

2005-09-15 [REF] CORRESPONDS TO:

- Document: DE 60021919 P 20050915

2005-08-10 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR

2004-07-14 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): DE FR

2004-06-30 [RTI1] TITLE (CORRECTION)

- Free text: STEEL HAVING WELD HEAT-AFFECTED ZONE EXCELLENT IN TOUGHNESS

2004-05-26 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): AT BE DE FR

2003-07-09 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030526

2003-03-26 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20030211

2003-03-26 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 22C 38/00 A

2003-03-26 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 22C 38/04 B

2002-12-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020910

2002-12-04 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR