The magnetic annealing is a particular type of heat treatment performed into a curing Oven or into a Furnace.
Why do this kind of treatments?
The ultimate aim is to eliminate the residual magnetism, which may be
present on some final products of machining, from ferrous parts.
A typical example is curing of laminations for trasformers and motors.
This type of heat treatment frequently takes place in vacuum oven or in acuring oven, furnaces in which each type of atmosphere is removed prior to the heating and the reaction.
Galli offer a wide type of models and solutions to fit the specific requirements of the users.
The magnetic annealing treatment usually involves the following steps:
• a slow heating of the pieces to the desired temperature
• maintaining at this temperature for a period ranging from 2 to 6 hours
• controlled cooling up to about 500 ° C
• slow cooling down to 300 ° C
• fast cooling below 100 ° C
These temperatures and treatment durations are, of course, vary depending on the types of objects and their shapes.
Others treatments of the laminations to occur in standard atmosphere furnace, or to a modified atmosphere with inert gas.
In general, using the magnetic annealing for the construction of components for printers, relays, magnetic sheets for transformers and other parts that require a neutral or predetermined magnetic charge to operate.