EP 1281777 B1 20100623 - A METHOD OF PRODUCING A ROLLED H-SHAPED STEEL HAVING UNIFORM MICROSTRUCTURE AND UNIFORM MECHANICAL PROPERTIES
Title (en)
A METHOD OF PRODUCING A ROLLED H-SHAPED STEEL HAVING UNIFORM MICROSTRUCTURE AND UNIFORM MECHANICAL PROPERTIES
Title (de)
HERSTELLUNGSVERFAHREN FÜR GEWALZTE H-PROFILSTAHL MIT GLEICHMÄSSIGER MIKROSTRUKTUR UND MECHANISCHENEIGENSCHAFTEN
Title (fr)
PROCEDE DE FABRICATION UNE PROFILE EN ACIER LAMINE EN FORME DE H A MICROSTRUCTURE UNIFORME ET PROPRIETES MECANIQUES UNIFORMES
Publication
Application
Priority
- JP 0102931 W 20010404
- JP 2000102299 A 20000404
- JP 2000109778 A 20000411
- JP 2000296547 A 20000928
- JP 2001000695 A 20010105
Abstract (en)
[origin: EP1281777A1] The present invention relates to an H-section used as a member for building structures, and in particular, is a rolled H-section having uniform microstructures and uniform mechanical properties, and a method of producing the same, characterized in that: the microstructures satisfy any one or more of the following conditions on the basis of a 1/4 flange portion in a cross section of said H-section: 1) the deviations of the average grain sizes of ferrite in the microstructures of a 1/2 flange portion and a fillet portion from that of the 1/4 flange portion are within +/- 15% thereof, 2) the deviation of the average grain size of ferrite in the microstructure of a 1/2 web portion from that of the 1/4 flange portion is within +/- 15% thereof, 3) the deviations of the average rates of pearlite in the microstructures of a 1/2 flange portion and the fillet portion from that of the 1/4 flange portion are within +/- 8% thereof, and 4) the deviation of the average rate of pearlite in the microstructure of a 1/2 web portion from that of the 1/4 flange portion is within +/- 8% thereof. <IMAGE>
IPC 8 full level
C21D 8/00 (2006.01); B21B 1/08 (2006.01); C22C 38/00 (2006.01); C22C 38/12 (2006.01); C21D 9/00 (2006.01)
CPC (source: EP)
C21D 8/00 (2013.01); C22C 38/12 (2013.01); B21B 1/0815 (2013.01); B21B 1/088 (2013.01); C21D 9/0068 (2013.01)
Designated contracting state (EPC)
GB LU
DOCDB simple family (publication)
EP 1281777 A1 20030205; EP 1281777 A4 20050202; EP 1281777 B1 20100623; JP 4231226 B2 20090225; TW 541342 B 20030711; WO 0175182 A1 20011011
DOCDB simple family (application)
EP 01919779 A 20010404; JP 0102931 W 20010404; JP 2001573054 A 20010404; TW 90108189 A 20010404