Global Patent Index - EP 1277847 A1

EP 1277847 A1 20030122 - Case hardening steel and carburized part using same

Title (en)

Case hardening steel and carburized part using same

Title (de)

Einsatzgehärteter Stahl und aufgekohltes Werkstück aus diesem Stahl

Title (fr)

Acier de cémentation et pièce cémentée fabriquée en cet acier

Publication

EP 1277847 A1 20030122 (EN)

Application

EP 02015081 A 20020705

Priority

  • JP 2001216990 A 20010717
  • JP 2002075624 A 20020319

Abstract (en)

A case hardening steel high in impact strength, consists essentially of carbon in an amount of from 0.1 to 0.3 % by weight, silicon in an amount of from more than 0.3 to 1.0 % by weight, manganese in an amount of from 0.3 to 1.7 % by weight, phosphorus in an amount of not more than 0.03 % by weight, sulfur in an amount of not more than 0.03 % by weight, molybdenum in an amount of not more than 1.0 % by weight, aluminum in an amount of not more than 0.04 % by weight, nitrogen in an amount of not more than 0.03 % by weight, and balance being iron and inevitable impurities. The case hardening steel meets an equation of ÄC %Ü + 5(ÄP %Ü + ÄS %Ü) ≤ (ÄMn %Ü + ÄMo %Ü + 1.8) / 8. <IMAGE>

IPC 1-7

C22C 38/00; C22C 38/02; C22C 38/04; C23C 8/26

IPC 8 full level

C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); C22C 38/18 (2006.01); C22C 38/22 (2006.01); C22C 38/26 (2006.01); C22C 38/32 (2006.01); C22C 38/60 (2006.01); C23C 8/22 (2006.01); C23C 8/38 (2006.01); C23C 8/46 (2006.01); C23C 8/66 (2006.01)

CPC (source: EP US)

C22C 38/04 (2013.01 - EP US); C22C 38/18 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C23C 8/22 (2013.01 - EP US)

Citation (search report)

  • [X] US 4802918 A 19890207 - OOKI TAKAO [JP], et al
  • [A] US 4634573 A 19870106 - YANAGIYA TOSHIO [JP], et al
  • [A] FR 2339678 A1 19770826 - UGINE ACIERS [FR]
  • [X] PATENT ABSTRACTS OF JAPAN vol. 012, no. 496 (C - 555) 23 December 1988 (1988-12-23)
  • [X] PATENT ABSTRACTS OF JAPAN vol. 1995, no. 11 26 December 1995 (1995-12-26)
  • [AD] PATENT ABSTRACTS OF JAPAN vol. 1997, no. 12 25 December 1997 (1997-12-25)
  • [A] EDITED BY J. R. DAVIS: "Carbon and Alloy Steels", March 1996, ASM INTERNATIONAL, USA, XP002214993

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 1277847 A1 20030122; JP 2003096539 A 20030403; JP 3932102 B2 20070620; US 2003056859 A1 20030327

DOCDB simple family (application)

EP 02015081 A 20020705; JP 2002075624 A 20020319; US 19635802 A 20020717