EP 0064367 B1 19860129 - METHOD FOR INDUCTIVELY HEATING VALVE SEAT INSERTS
Title (en)
METHOD FOR INDUCTIVELY HEATING VALVE SEAT INSERTS
Publication
Application
Priority
US 25985681 A 19810504
Abstract (en)
[origin: EP0064367A2] A method for heating a conical valve seat surface on a ferrous seat ring insert which is fixedly received by a bore in an aluminum engine component. The method involves high power induction heating including the steps of locating an inductor adjacent the valve seat surface and then energizing the inductor by a power source having some predetermined frequency and elevated power rating. The method also includes the step of maintaining the inductor in an energized condition for some predetermined period of time to transform the metal forming the valve seat into an austenitic structure to a preselected depth. The steps of energizing and maintaining are coordinated such that the desired transformation is obtained in a very short time interval. This then advantageously prevents deleterious expansion of the insert heat transfer through the insert to the aluminum engine component which would otherwise adversely affect the close fitting relationship between the insert and bore.
IPC 1-7
IPC 8 full level
C21D 1/10 (2006.01); C21D 9/00 (2006.01); F01L 3/22 (2006.01); F01L 3/24 (2006.01); H05B 6/02 (2006.01); H05B 6/10 (2006.01)
CPC (source: EP)
C21D 9/0068 (2013.01); F01L 3/22 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0064367 A2 19821110; EP 0064367 A3 19830330; EP 0064367 B1 19860129; AT E17814 T1 19860215; CA 1187142 A 19850514; DE 3268757 D1 19860313; JP S57194212 A 19821129; JP S6047884 B2 19851024; MX 151639 A 19850123
DOCDB simple family (application)
EP 82302088 A 19820423; AT 82302088 T 19820423; CA 402185 A 19820503; DE 3268757 T 19820423; JP 7506282 A 19820504; MX 19253882 A 19820503