EP 3115478 A4 20170906 - HIGH-CARBON STEEL WIRE HAVING SUPERIOR WIRE DRAWING PROPERTIES AND METHOD FOR PRODUCING SAME
Title (en)
HIGH-CARBON STEEL WIRE HAVING SUPERIOR WIRE DRAWING PROPERTIES AND METHOD FOR PRODUCING SAME
Title (de)
DRAHT AUS KOHLENSTOFFREICHEM STAHL MIT HERVORRAGENDEN DRAHTZIEHEIGENSCHAFTEN UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
FIL D'ACIER À TENEUR ÉLEVÉE EN CARBONE PRÉSENTANT D'EXCELLENTES PROPRIÉTÉS D'ÉTIRAGE DE FIL ET SON PROCÉDÉ DE PRODUCTION
Publication
Application
Priority
- JP 2014044216 A 20140306
- JP 2015056691 W 20150306
Abstract (en)
[origin: EP3115478A1] The present invention provides a wire rod having good wire drawing characteristics stably in actual production and a method for production of such wire rod. The wire rod has a chemical composition including, by mass%, C: 0.7 to 1.2%, Si: 0.1 to 1.5%, Mn: 1.0% or less, N: 0.005ppm or less, and a balance of Fe and unavoidable impurities, wherein 80% or more of a microstructure is a bainite structure and a remaining microstructure is a nonbainite structure in a cross-section of the wire rod, wherein a full width at half maximum of a (211) crystal face of a ferrite phase in the structure of the wire rod cross-section is 0.6° or less, wherein a tensile strength TS (MPa) and reduction of area RA (%) respectively satisfy the following formula (1) and the following formula (2), and wherein a standard deviation of hardness distribution of Vickers hardness (Hv) in the cross-section is less than 6. TS ‰¤ 580 + 700 × C RA ‰¥ 100 ˆ’ 46 × C ˆ’ 18 × Mn ˆ’ 10 × Cr
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/06 (2006.01); C21D 9/52 (2006.01); C21D 9/64 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/20 (2006.01); C22C 38/24 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR)
C21D 8/06 (2013.01 - EP); C21D 8/065 (2013.01 - EP KR); C21D 9/52 (2013.01 - EP KR); C21D 9/64 (2013.01 - KR); C22C 38/00 (2013.01 - EP); C22C 38/001 (2013.01 - EP KR); C22C 38/002 (2013.01 - EP); C22C 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP); C22C 38/08 (2013.01 - EP); C22C 38/12 (2013.01 - EP); C22C 38/14 (2013.01 - EP); C22C 38/16 (2013.01 - EP); C22C 38/18 (2013.01 - EP KR); C22C 38/20 (2013.01 - EP KR); C22C 38/24 (2013.01 - EP KR); C22C 38/54 (2013.01 - KR); C21D 9/64 (2013.01 - EP); C21D 2211/002 (2013.01 - EP KR)
Citation (search report)
- [XI] JP 3388418 B2 20030324
- [XI] JP 2984888 B2 19991129
- [A] JP H06306481 A 19941101 - NIPPON STEEL CORP
- [A] US 5647918 A 19970715 - KAWANA AKIFUMI [JP], et al
- [A] JP 2002241899 A 20020828 - KOBE STEEL LTD
- [A] JP 2001220650 A 20010814 - SUMITOMO ELECTRIC INDUSTRIES
- See references of WO 2015133614A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3115478 A1 20170111; EP 3115478 A4 20170906; EP 3115478 B1 20190501; CN 105980589 A 20160928; CN 105980589 B 20180116; JP 5900710 B2 20160406; JP WO2015133614 A1 20170406; KR 101944599 B1 20190131; KR 20160114697 A 20161005; WO 2015133614 A1 20150911
DOCDB simple family (application)
EP 15759266 A 20150306; CN 201580008557 A 20150306; JP 2015056691 W 20150306; JP 2015537034 A 20150306; KR 20167023858 A 20150306