SECO WARWICK ALLIED, with technologies and back-up provided by SECO/WARWICK. manufactures a wide variety of custom furnace systems for transformer core annealing, lamination annealing, bluing and amorphous metal processes. For batch or continuous operations, SECO WARWICK ALLIED provides quality roller hearth, pusher, mesh belt, bell and elevator furnace systems with PC / PLC control systems that provide precision temperature control and process flexibility.

In process annealing, in addition to removing strains set up by cold working, carbon levels are reduced by carrying out the annealing cycle in a decarburizing atmosphere. Hysterisis losses are decreased and permeability is increased. Carbon levels can be reduced from .08% to less than. 01%in AISI1008 steel. Eddy current losses vary with lamination thickness and lamination coatings. Organic, inorganic or magnetite (Fe3O4) coatings are given between laminations to reduce or minimize eddy current losses. These coatings are generally applied with rolls and then baked to remove a volatile vehicle. Magnetite (Fe3O4) is applied by exposing the lamination to a high dew point exothermic atmosphere or a super heated steam atmosphere for a period of up to one hour at a temperature of 5100F. This coating greatly increases resistance between laminations and provide high resistance to rust and corrosion.

Lamination Annealing

Batch or continuous annealing of stamped laminations follow a cycle employing a rich exothermic atmosphere with soaking time for decarburization and grain growth. Cooling cycles are also controlled to obtain optimum magnetic qualities. All stamping oils must be removed before the steel is introduced to the annealing chamber.

Transformer Core Annealing

Wherein dew point is critical as oxygen compounds, such as water vapour are oxidizing to silicon, and long exposures to this oxidizing condition can undermine the mill anneal finish and cause growth and dimensional difficulties.

Amorphous Metal

During heat processing, an electrical charge must be placed on the material as it is heated and it must be heated and cooled under a protective atmosphere.

SECO WARWICK ALLIED has the back-up experience of SECO/WARWICK to provide equipment that will create all these for best results.

Our control systems cover all the functions connected with every mechanism and heat treatment process control of the furnace equipment operation and options include, but are not limited to, supervisory controls, monitoring functions, diagnostic features, networking, data import / export, and data collection.

	Optional Equipment SECO WARWICK ALLIED can provide a variety of equipment options to complete your heat-treating system including material handling systems, quench systems, protective atmosphere systems, cooling equipment and loaders.
Roller Hearth furnace used for Electric steel	Typical furnace for Transformer core HT