Removing Air and Reactive Elements with Vacuum Treating
Vacuum heat treat technology continues to evolve. In the 1990’s, most heat treat vacuum equipment was limited to hardening and the quench pressure was limited as well. In the past twenty years, other processes have been successfully performed in vacuum furnaces. These include: hardening,
carburizing,
nitriding,
annealing
and tempering.
The primary advantage of vacuum technology is the absence of oxygen in the furnaces at high heat, up to 1000 º C, which is especially critical on tool steels. At American Steel Treating, we understand that vacuum furnaces must be properly maintained, otherwise they will be less efficient at treating. We take the steps top properly clean our furnace and materials before each treating session.
Improving Materials with Oil Hardening
Oil hardening is a generic term used for quenching ferrous metals. There are many different types of ferrous metals that can be hardened and quenched with oil. Material type typically dictates the quench media to use, which can vary from brine / caustic, to water, hot and cold oil, salt and high pressure vacuum using backfill gases such as nitrogen.