EP 0617134 B1 19990609 - Process for remelting surface areas of workpieces
Title (en)
Process for remelting surface areas of workpieces
Title (de)
Verfahren zum Umschmelzen von Oberflächenbereichen von Werkstücken
Title (fr)
Procédé pour la refusion de zones de surface de pièces à usiner
Publication
Application
Priority
DE 4309870 A 19930326
Abstract (en)
[origin: EP0617134A1] The surface zones of workpieces of differing geometry and shape are to be modified in their properties such as, for example, wear resistance, by remelting of means of an energy beam, preferably an electron beam. By the introduction of melting tracks, workpieces of cast iron are treated in such a way that the surface zones are modified in a defined manner with slight surface deformation and freedom from pores is achieved. According to the invention, a wedge-shaped melting zone is produced by the deflectable energy beam, forming a vapour capillary. During this step, a critical value of the temperature in a defined edge region of the melting track, in particular of the surface temperature, is not exceeded. Certain parameters of the energy beam and the depth/width ratio of the melting track are preset. The process is preferably applied in the surface hardening of machine components, for example the running surfaces of camshafts. <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)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0617134 A1 19940928; EP 0617134 B1 19990609; DE 4309870 A1 19940929; DE 59408379 D1 19990715
DOCDB simple family (application)
EP 94104259 A 19940318; DE 4309870 A 19930326; DE 59408379 T 19940318