Hardening is achieved by precipitation of an element from a supersaturated solid solution. One or more of the metal elements or carbides enter into a solid solution and is then cooled rapidly enough to hold the alloy in a solution. Like tempering, stress relieving is always done by heating to some temperature below the lower transformation temperature for steels and irons. The primary purpose of stress relieving is to relieve stresses that have been imparted to the workpiece from such processes as forming, rolling, machining or welding. Metal is joined when a braze alloy creates a diffusion bond between the metal components during the thermal vacuum process.
Finished parts are bright and clean.
Vacuum Heat Treating. Heating and cooling solid metal and alloy in a vacuum furnace creates certain desired conditions or mechanical properties. The controlled environments and precise temperature controls also enable the achievement of higher standards for the metal or alloy part. The process delivers a bright and clean finish. Vacuum Hardening .