Global Patent Index - EP 0218167 A1

EP 0218167 A1 19870415 - High tensile strength drawn steel wire with improved ductility.

Title (en)

High tensile strength drawn steel wire with improved ductility.

Title (de)

Gezogener Stahldraht mit hoher Bruchfestigkeit und Duktilität.

Title (fr)

Fil d'acier tréfilé à haute résistance à la rupture et à ductilité modifiée.

Publication

EP 0218167 A1 19870415 (EN)

Application

EP 86113353 A 19860929

Priority

  • JP 21477085 A 19850930
  • JP 21477185 A 19850930
  • JP 21497785 A 19850930

Abstract (en)

The high tensile drawn steel wire of the present invention contains 0.4 to 1.0% by weight of C, 2.0% or less by weight of Si, 0.2 to 2% by weight of Mn, 0.02% or less by weight of P, 0.02% or less by weight of S, and 0.01% or less by weight of N, and has a strength of 130 kgf/mm<2> or more and a residual compression stress of between (0.05 sigma + 23) and (0.35 sigma + 28) kgf/mm<2> on its surface, depending on its strength sigma . The steel wire has excellent ductility. The method of producing the steel wire comprises the step of applying a residual compression stress on its surface, preferably by rolling in a rolling machine (3).

IPC 1-7

C21D 7/04; C21D 8/06

IPC 8 full level

C21D 7/04 (2006.01); C21D 8/06 (2006.01); C22C 38/04 (2006.01); C22C 38/54 (2006.01)

CPC (source: EP KR)

C21D 7/04 (2013.01 - EP); C21D 8/06 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/54 (2013.01 - KR)

Citation (search report)

  • [X] GB 531017 A 19401227 - RICHARD JOHNSON & NEPHEW LTD, et al
  • [X] DE 747761 C 19441013 - OTTO FOEPPL
  • [A] GB 712125 A 19540721 - JOHANNES SCHWARZ
  • [A] FR 678070 A 19300318
  • [X] PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 61 (C-156)[1206], 15th March 1983; & JP-A-57 210 916 (SUMITOMO DENKI KOGYO K.K.) 24-12-1982
  • [A] STAHL UND EISEN, vol. 104, no. 14, 9th July 1984, pages 657-660, Düsseldorf, DE; E. von FINCKENSTEIN et al.: "Eigenspannungen beim Oberflächen-Feinwalzen"
  • [AD] WIRE JOURNAL INTERNATIONAL, vol. 16, no. 4, 1983, pages 50-61, Guildford, US; K. AIHARA et al.: "High-strength and high-fatigue limit zinc galvanized steel cord for ACSR"

Designated contracting state (EPC)

BE DE FR

DOCDB simple family (publication)

EP 0218167 A1 19870415; EP 0218167 B1 19901128; DE 3675874 D1 19910110; KR 870003227 A 19870416; KR 910003978 B1 19910617

DOCDB simple family (application)

EP 86113353 A 19860929; DE 3675874 T 19860929; KR 860008244 A 19860930