Global Patent Index - EP 3988678 A4

EP 3988678 A4 20220706 - WIRE ROD

Title (en)

WIRE ROD

Title (de)

WALZDRAHT

Title (fr)

FIL MACHINE

Publication

EP 3988678 A4 20220706 (EN)

Application

EP 20827854 A 20200619

Priority

  • JP 2019113720 A 20190619
  • JP 2020024248 W 20200619

Abstract (en)

[origin: EP3988678A1] This wire rod has a predetermined chemical composition, satisfies the following (1) to (3), contains a pearlite structure having 90% or more of a metal structure, and satisfies the following (4) in a case in which a value of a Vickers hardness at a surface layer portion for each sample is HV<sub>si</sub> with respect to each of eight samples si collected at arbitrary equal intervals in a longitudinal direction of the wire rod, and an average value and maximum value of HV<sub>si</sub> are respectively Hv<sub>siave</sub> and Hv<sub>simax</sub>: Cu/Ni>1.001.70≤Y1≤4.50Y1=3×Cr+5×Mn+Cu+NiY2<1.81Y2=C+Si/10+AA satisfies A = a in a case in which a value of a = 350 × ([N] - 0.29 × [Ti]) satisfies a ≥ 0, and A = 0 in a case in which the value satisfies a < 0 Hvsimax−Hvsiave≤50.

IPC 8 full level

C21D 8/06 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/42 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C21D 1/32 (2006.01); C21D 1/46 (2006.01); C21D 1/48 (2006.01); C21D 1/56 (2006.01); C21D 1/607 (2006.01)

CPC (source: CN EP)

C22C 38/001 (2013.01 - CN); C22C 38/002 (2013.01 - CN EP); C22C 38/005 (2013.01 - CN EP); C22C 38/008 (2013.01 - CN EP); C22C 38/02 (2013.01 - CN EP); C22C 38/04 (2013.01 - CN EP); C22C 38/06 (2013.01 - CN); C22C 38/08 (2013.01 - CN EP); C22C 38/12 (2013.01 - CN EP); C22C 38/14 (2013.01 - CN EP); C22C 38/16 (2013.01 - CN EP); C22C 38/34 (2013.01 - CN); C22C 38/40 (2013.01 - CN); C22C 38/42 (2013.01 - CN EP); C22C 38/44 (2013.01 - CN); C22C 38/46 (2013.01 - CN); C22C 38/48 (2013.01 - CN); C22C 38/50 (2013.01 - CN EP); C22C 38/54 (2013.01 - CN EP); C21D 1/32 (2013.01 - EP); C21D 1/46 (2013.01 - EP); C21D 1/48 (2013.01 - EP); C21D 1/56 (2013.01 - EP); C21D 1/607 (2013.01 - EP); C21D 8/065 (2013.01 - EP); C21D 2211/009 (2013.01 - EP)

Citation (search report)

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

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3988678 A1 20220427; EP 3988678 A4 20220706; EP 3988678 B1 20231206; CN 113748224 A 20211203; CN 113748224 B 20220503; JP 7226548 B2 20230221; JP WO2020256140 A1 20201224; WO 2020256140 A1 20201224

DOCDB simple family (application)

EP 20827854 A 20200619; CN 202080032029 A 20200619; JP 2020024248 W 20200619; JP 2021526947 A 20200619