EP 1116796 A2 20010718 - High chromium ferritic heat resisting steel and method of heat treatment for the same
Title (en)
High chromium ferritic heat resisting steel and method of heat treatment for the same
Title (de)
Temperaturbeständiger ferritischer Stahl mit hohem Chromgehalt und Verfahren zur Wärmebehandlung desselben
Title (fr)
Acier ferritique réfractaire riche en chrome et procédé pour son traitement thermique
Publication
Application
Priority
JP 2000006219 A 20000111
Abstract (en)
The invention provides a method of heat-treatment for high chromium ferritic heat resisting steel, which comprises the steps of: (a) heat-treating for 5 seconds or longer high chromium ferritic steel containing chromium (Cr) in amount of 7-12 weight %; one or two elements of molybdenum (Mo) and tungsten (W) as a solid-solution strengthening element; and one or more of elements for forming (a) MX carbonitride(s) at a temperature higher than both solid-solution temperature of said element(s) for forming the MX carbonitride(s) and a precipitation starting temperature of delta ferrite; (b) cooling said steel at a rate of 0.5 DEG C/s or faster; and (c) subsequently tempering said steel.
IPC 1-7
IPC 8 full level
C21D 6/00 (2006.01); C22C 38/00 (2006.01); C22C 38/22 (2006.01); C22C 38/28 (2006.01); C21D 1/18 (2006.01)
CPC (source: EP US)
C21D 6/002 (2013.01 - EP US); C21D 1/18 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1116796 A2 20010718; EP 1116796 A3 20031217; JP 2001192730 A 20010717; US 2002033210 A1 20020321
DOCDB simple family (application)
EP 01300136 A 20010108; JP 2000006219 A 20000111; US 75509801 A 20010108