EP 1696108 A1 20060830 - Heat resistant alloy for exhaust valves durable at 900°C and exhaust valves made for the alloy
Title (en)
Heat resistant alloy for exhaust valves durable at 900°C and exhaust valves made for the alloy
Title (de)
Hitzbeständige Legierung für bei 900°C nachhaltige Auslassventile und Auslassventile aus dieser Legierung
Title (fr)
Alliage résistant aux températures élevées pour soupapes d'échappement durables à 900°C et soupapes d'échappement fabriquées dans cet alliage
Publication
Application
Priority
- JP 2005012030 A 20050119
- JP 2005341574 A 20051128
Abstract (en)
An exhaust valve for automobile engines, which is durable at such a high temperature as 900°C, and exhibits high fatigue strength and high oxidation resistance is disclosed. The exhaust valve is made of a Ni-based alloy consisting essentially of, by weight %, C: 0.01-0.15%, Si: up to 2.0%, Mn: up to 1.0%, P: up to 0.02%, S: up to 0.01%, Co: 0.1-15%, Cr: 15-25%, one or two of Mo: 0.1-10% and W: 0.1-5% in such amount that Mo+1/2W: 3-10%, Al: 1.0-3.0%, Ti: 2.0-3.5%, provided that, by atomic %, Al+Ti: 6.3-8.5% and Ti/Al ratio: 0.4-0.8, and further, by weight %, B: 0.001-0.01%, Fe: up to 3%, and the balance of Ni and inevitable impurities by hot forging to give the form of an exhaust valve and subjecting to solid solution at 1000-1200°C and aging at 700-950°C
IPC 8 full level
F01L 3/02 (2006.01); B21J 9/08 (2006.01); C22C 19/05 (2006.01); C22F 1/10 (2006.01)
CPC (source: EP US)
B21K 1/22 (2013.01 - EP US); C22C 19/055 (2013.01 - EP US); C22C 19/057 (2013.01 - EP US); C22F 1/10 (2013.01 - EP US); F01L 3/02 (2013.01 - EP US); F01L 2301/00 (2020.05 - EP US); F01L 2303/00 (2020.05 - EP US)
Citation (search report)
- [A] US 6139660 A 20001031 - NAGASHIMA TOMOTAKA [JP], et al
- [A] EP 0889207 A1 19990107 - DAIDO STEEL CO LTD [JP]
- [A] US 2002195175 A1 20021226 - ISHIDA KIYOHITO [JP], et al
- [DA] PATENT ABSTRACTS OF JAPAN vol. 010, no. 310 (C - 379) 22 October 1986 (1986-10-22) & US 4871512 A 19891003 - TAKAGI YOSHIAKI [JP], et al
- [DA] PATENT ABSTRACTS OF JAPAN vol. 017, no. 373 (C - 1083) 14 July 1993 (1993-07-14)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
US 2006157171 A1 20060720; DE 602006000160 D1 20071129; DE 602006000160 T2 20080724; EP 1696108 A1 20060830; EP 1696108 B1 20071017; JP 2006225756 A 20060831; JP 4830466 B2 20111207
DOCDB simple family (application)
US 33458306 A 20060119; DE 602006000160 T 20060117; EP 06000958 A 20060117; JP 2005341574 A 20051128