EP 3279356 A4 20181003 - AGE-HARDENING STEEL AND METHOD OF MANUFACTURING PARTS USING AGE-HARDENING STEEL
Title (en)
AGE-HARDENING STEEL AND METHOD OF MANUFACTURING PARTS USING AGE-HARDENING STEEL
Title (de)
ALTERSHÄRTENDER STAHL UND VERFAHREN ZUR HERSTELLUNG VON TEILEN MIT ALTERSHÄRTENDEM STAHL
Title (fr)
ACIER DURCI PAR VIEILLISSEMENT ET PROCÉDÉ DE FABRICATION DE PIÈCES À L'AIDE D'ACIER DURCI PAR VIEILLISSEMENT
Publication
Application
Priority
- JP 2015070839 A 20150331
- JP 2016058585 W 20160317
Abstract (en)
[origin: EP3279356A1] Age hardening steel excellent in machinability before aging treatment and excellent in fatigue characteristics, toughness, and low cycle fatigue characteristics after aging treatment, that is, age hardening steel containing predetermined amounts of C, Si, Mn, S, Cr, Al, V, Nb, Ca, and REM, limiting contents of P, Ti, and N to predetermined amounts or less, having a balance of Fe and impurities, having an area ratio of bainite structures of 70% or more, and, furthermore, having a chemical composition where F1 expressed by C+0.3×Mn+0.25×Cr is 0.68 or more, F2 expressed by C+0.1×Si+0.2×Mn+0.15×Cr+0.35×V is 0.85 or less, F3 expressed by -4.5×C+Mn+Cr-3.5×V is 0.00 or more, and F4 expressed by 10×Ca+REM is 0.012 to 0.08, is provided. Note that, the symbols of elements in the formulas showing F1 to F4 mean the contents by mass% of those elements.
IPC 8 full level
C22C 38/00 (2006.01); C21D 6/00 (2006.01); C21D 6/02 (2006.01); C21D 8/06 (2006.01); C21D 9/00 (2006.01); C21D 9/52 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/58 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP KR US)
C21D 6/004 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 6/02 (2013.01 - EP US); C21D 8/06 (2013.01 - KR); C21D 8/065 (2013.01 - EP US); C21D 9/0068 (2013.01 - EP US); C21D 9/525 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP KR US); C22C 38/005 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/24 (2013.01 - KR); C22C 38/26 (2013.01 - KR); C22C 38/38 (2013.01 - KR); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP KR US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - US); C22C 38/58 (2013.01 - EP US); C22C 38/60 (2013.01 - EP KR US); C21D 2211/002 (2013.01 - EP KR US)
Citation (search report)
- [A] JP 2013245363 A 20131209 - NIPPON STEEL & SUMITOMO METAL CORP
- [A] JP 2000017374 A 20000118 - AICHI STEEL WORKS LTD
- [A] FR 2990218 A1 20131108 - DAIDO STEEL CO LTD [JP]
- See references of WO 2016158470A1
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 3279356 A1 20180207; EP 3279356 A4 20181003; CN 107250410 A 20171013; CN 107250410 B 20181221; JP 6536673 B2 20190703; JP WO2016158470 A1 20171221; KR 101918432 B1 20181113; KR 20170097743 A 20170828; US 2018044757 A1 20180215; WO 2016158470 A1 20161006
DOCDB simple family (application)
EP 16772353 A 20160317; CN 201680010678 A 20160317; JP 2016058585 W 20160317; JP 2017509558 A 20160317; KR 20177020209 A 20160317; US 201615556473 A 20160317