EP 0601451 B1 20000823 - Process for hardness increasing and possibly for smoothing of work pieces and work pieces made by this process
Title (en)
Process for hardness increasing and possibly for smoothing of work pieces and work pieces made by this process
Title (de)
Verfahren zum Aufhärten und ggf. Glätten von Maschinenbauteilen sowie nach diesem Verfahren hergestellten Maschinenbauteilen
Title (fr)
Procédé de durcissement et éventuellement de lissage de pièces de machine et pièces fabriquées selon ce procédé
Publication
Application
Priority
DE 4241527 A 19921210
Abstract (en)
[origin: EP0601451A1] A process for increasing the hardness and, if desired, smoothing of machine components by means of a beam such as, for example, a laser beam, an electron beam or an electric arc, which effects surface heating of the particular component, is characterised in that the particular component, which is present in the form of a chilled casting having a ledeburite microstructure or in the form of a steel component having a perlite microstructure, is treated at a high energy density, the surface layer being briefly heated either continuously or by repeated pulses up to the vicinity of the melting point, so that, in an edge layer, a diffusion of the carbon from the cementite lamellae of the ledeburite or of the perlite into the soft, interlamellar ferrite regions takes place. <IMAGE>
IPC 1-7
IPC 8 full level
C21D 1/09 (2006.01); C21D 5/00 (2006.01); C21D 9/30 (2006.01)
CPC (source: EP)
C21D 1/09 (2013.01); C21D 5/00 (2013.01); C21D 9/30 (2013.01); C21D 2211/007 (2013.01); C21D 2211/009 (2013.01)
Citation (examination)
Werkstatt und Betrieb, 123(1990)11, 875-877
Designated contracting state (EPC)
DE ES FR GB SE
DOCDB simple family (publication)
EP 0601451 A1 19940615; EP 0601451 B1 20000823; DE 4241527 A1 19940616; DE 59310090 D1 20000928; ES 2151496 T3 20010101
DOCDB simple family (application)
EP 93119338 A 19931201; DE 4241527 A 19921210; DE 59310090 T 19931201; ES 93119338 T 19931201