WHY VACUUM HEAT TREATING? At the elevated temperatures used in heat treating, metal surfaces react with oxygen, hydrogen, water vapor and other atmospheric gases to cause undesirable effects including oxidation, decarburization, cracking, corrosion damage, and discoloration. This is especially problematic when finish machined parts are being heat treated. Vacuum heat treating solves this problem by heat treating in a special vessel from which virtually all of the air has been removed. Quenching is performed using high velocity argon or nitrogen gas.
NATIONAL HEAT TREAT - THE VACUUM EXPERTS: At National Heat Treat, vacuum heat treating is one of our specialties. We have one of the largest commercial vacuum furnaces in the region with a working zone of 72" in diameter x 80" in height. This vertical furnace is able to handle loads up to 8000 lbs and can reach temperatures as high as 2400℉ and features an integrated gas quench using nitrogen or argon. In addition, we have a horizontal vacuum furnace providing additional capacity.