EP 0925377 B1 20011212 - WEAR-RESISTANT CAMSHAFT AND METHOD OF PRODUCING THE SAME
Title (en)
WEAR-RESISTANT CAMSHAFT AND METHOD OF PRODUCING THE SAME
Title (de)
VERSCHLEISSBESTÄNDIGE NOCKENWELLE UND VERFAHREN ZU IHRER HERSTELLUNG
Title (fr)
ARBRE A CAMES RESISTANT A L'USURE ET PROCEDE PERMETTANT DE LE PRODUIRE
Publication
Application
Priority
- DE 9702072 W 19970912
- DE 19637464 A 19960913
Abstract (en)
[origin: DE19637464C1] The invention concerns a wear-resistant camshaft and a method of producing the same. Objects to which the invention is advantageously applicable include all cast-iron parts which are subject to wear as a result of lubricated friction. The wear-resistant camshaft consists of cast-iron and comprises a surface layer consisting of a ledeburitic recast layer with a high cementite portion and, lying therebelow, a martensitic hardening zone. According to the invention, the recast layer consists of finely dispersed ledeburitic cementite with thicknesses of </= 0.1 mu m and a metallic matrix comprising a phase mixture of martensite and/or bainite, residual austenite and less than 20 % finely laminated perlite with a distance of </= 0.1 mu m between the laminations. The hardening layer is formed from a phase mixture of martensite and/or bainite, partially dissolved perlite and residual austenite. This wear-resistant camshaft according to the invention is produced by means of a high-energy surface recasting method.
IPC 1-7
IPC 8 full level
C21D 1/09 (2006.01); C21D 5/00 (2006.01); C21D 9/30 (2006.01); F01L 1/047 (2006.01)
CPC (source: EP US)
C21D 5/00 (2013.01 - EP US); C21D 9/30 (2013.01 - EP US); F01L 1/047 (2013.01 - EP US); C21D 1/09 (2013.01 - EP US); C21D 2211/007 (2013.01 - EP US); Y10S 148/902 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 19637464 C1 19971009; CZ 295308 B6 20050713; CZ 83899 A3 20000517; DE 59705796 D1 20020124; EP 0925377 A1 19990630; EP 0925377 B1 20011212; JP 2001503104 A 20010306; US 6398881 B1 20020604; WO 9811262 A1 19980319
DOCDB simple family (application)
DE 19637464 A 19960913; CZ 83899 A 19970912; DE 59705796 T 19970912; DE 9702072 W 19970912; EP 97943775 A 19970912; JP 51316198 A 19970912; US 25470499 A 19990519