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Machine translation
1. (WO1980002434) SURFACE HARDENING OF METALS BY ELECTRIC ARC DISCHARGE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002434    International Application No.:    PCT/AU1980/000009
Publication Date: 13.11.1980 International Filing Date: 06.05.1980
IPC:
C21D 1/09 (2006.01)
Applicants:
Inventors:
Priority Data:
8664/79 07.05.1979 AU
Title (EN) SURFACE HARDENING OF METALS BY ELECTRIC ARC DISCHARGE
(FR) DURCISSEMENT EN SURFACE DE METAUX PAR UN ARC DE DECHARGE ELECTRIQUE
Abstract: front page image
(EN)Alloys which respond to heat treatment are surface hardened by establishing an electric arc between a non-consumable electrode and the metal surface and causing relative movement between the arc and metal surface to occur so that the surface temperature is raised to the austenitic range but below the melting point. Removal of the arc causes the surface to cool rapidly and brings about transformation hardening. The procedure may be applied to steels, cast irons and certain non-ferrous metal alloys which are susceptible to transformation hardening. Practical applications include the surface hardening of railway track, railway wheels and crankshafts as well as the cylinder walls and valve seats of internal combustion engines.
(FR)Des alliages qui repondent a un traitement thermique sont durcis en surface en etablissant un arc electrique entre une electrode non consommable et la surface du metal et en effectuant un mouvement relatif entre l"arc et la surface metallique afin que la temperature en surface s"eleve jusque dans la plage austenitique mais en dessous du point de fusion. Le retrait de l"arc entraine le refroidissement rapide de la surface et provoque le durcissement par transformation. Le procede peut etre applique aux aciers, aux fers forges et a certains alliages de metaux non-ferreux qui sont aptes au durcissement par transformation. Des applications pratiques comprennent le durcissement en surface de rails de chemin de fer, de roues de chemin de fer, de vilebrequins ainsi que des parois de cylindres et de sieges de soupapes de moteurs a combustion interne.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)