Naslov
A NEW PRINCIPLE OF EQUIPMENT FOR THE HARDENING OF TOOLS AND DIES

Autori
Stupnišek, Mladen ; Kostanjski, Željko ; Lisac, Rene

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
PROCEEDINGS OF 7TH INTERNATIONAL TOOLING CONFERENCE / MARIO, ROSSO, M. ACTIS, GRANDE, DANIEL, UGUES - Torino : POLITECNICO DI TORINO, ITALY, 2006, 241-248

Skup
TOOLING MATERIALS AND THEIR APPLICATIONS FROM RESEARCH TO MARKET

Mjesto i datum
Torino, Italija, 02.05.2006. - 05.05.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Hardening; Tool steels; Oxidation; Decarburization; Nitrogen absorption; Noble gas; Carbide precipitation; Thermal hardening

Sažetak
A technological analysis of the vacuum furnace application for hardening of tools and dies with respect to heating and quenching requirements has been performed. It was noted that in modern vacuum furnaces the hardening process is performed mainly under gas atmosphere but under vacuum conditions only at the beginning during air evacuation. Analyses show that the hypereutectoid carbide precipitation cannot be avoided due to the insufficiently fast cooling in the high pressure gas quenching. A design of an integral quench furnace with a closed system of introducing the noble gas, i.e. argon or helium, and of quenching in a hot oil bath has been developed. The new design reduces the possibility of carbide precipitation and also reduces thermal stresses applying thermal hardening.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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