Furnace Operation
Adding High Velocity to High Pressure Gas Quenching
When gas quenching, the minimizing of heat treat distortion is gears may be a matter of high pressure and high velocity. That’s what Solar Atmospheres thinks, that’s why the heat treat company sends helium gas into its vacuum furnaces at more than 100mph.
High Gas Velocity: A New Frontier of Cooling Performance in Vacuum Furnaces
Because there are diminishing returns in cooling capacity by simply increasing quench-gas pressure, increasing gas velocity might be the answer to the problem.
Product Quality Improvement With Correct Moisture Measurement in Thermal Processes Using Electrolytic Hygrometers
Moisture analysis at different phases of the heat treat process is crucial as even trace amounts of oxygen and water vapor can lead to oxidation of the materials being processed. This paper explores why moisture reduction is critical and how to properly calibrate and operate an electrolytic hygrometer to monitor moisture in vacuum heat treating.
Basic Vacuum Practice by Varian
Basic vacuum practices, a primer and basic introduction for vacuum technicians
Assessing Work-Basket Alloys for Vacuum Furnaces
A commercial heat treating company draws on its experience and test results to determine which high-temperature alloys use for vacuum furnace baskets.
High-Velocity Gas Flow Seen as Key to Rapid Quench
Both theoretical calculations and experience indicate that high-velocity gas flow resulting in gas turbulence within the furnace hot zone is the principal factor for rapid quenching. Therefore, a high-volume recirculating gas atmosphere is essential for providing high-cfm flow through the work zone while conserving gas.
