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Can-Eng’s Roller Hearth Furnace Systems are workhorses for heat treating a great variety of materials. Whether you are annealing, bright annealing, normalizing, reheating, stress relieving or tempering, Can-Eng furnaces deliver consistent quality and reliable performance.
•Excellent for atmosphere and non-atmosphere heat treating
•Capacity up to 80,000 lbs/hr
•Flexible processing capabilities
•Excellent uniformity part to part
•Suitable for long product processing
•Recuperative and regenerative burner designs available for fuel efficiency
•Both direct and indirect-fired combustion systems are available
•Versatile product conveyance.
•Rolls allow for direct product loading or the use of fixtures and trays.
•High alloy heat resistant cast rolls
•Uniform temperature in heating chamber.
•Capacity up to 80,000 lbs./hr. (37,000 kgs/hr.)
•Combined over/under hearth firing available
•A wide range of protective atmospheres are available
•A variety of convective heat transfer fans are available
Applications: Carbon steels, Tool steels, Aluminum, Alloy steels, Stainless steels, Brass, Copper
Processes: Bright annealing, Stress relieving, Annealing, Normalizing
Quench and Temper, Reheating, Tempering
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Steel rods and pipes are mainly heat-treated using roller hearth furnaces. The high temperature consistency and low energy consumption of these furnaces, normally gas-fired, ensure reproducible quality and short treatment times. The processes used for heat treating non-alloyed and alloyed carbon steel pipes at temperatures between 450°C and 1050°C include stress relieving, recrystallizing, normalizing, soft annealing and spheroidizing in indirectly fired continuous roller hearth furnaces. For the spheroidizing of pipes made from high-carbon ball bearing steel, vacuum vestibules to completely isolate the furnace atmosphere from the surrounding air are essential, at least at the furnace entry. Vacuum vestibules are also needed at the entry and exit of continuous roller hearth furnaces for the bright solution annealing of high-alloy austenitic pipes. In the heat treatment of copper alloy bars and pipes, zinc, which can be easily oxidized, is the critical element in the alloy. Rapid cooling is essential to ensure that the zinc is kept in solution. This can be achieved using optional high-convection cooling chambers with a hydrogen atmosphere.
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Wellman's broad experience in building Roller Hearth Furnaces includes direct-fired and atmosphere furnaces for temperatures to 2100°F (1150°C). Fuel-fired or electrically heated designs are available.
These furnaces are ideal for lamination annealing, tube annealing and many other processes. For example, a successful Roller Heath line was provided for reheating molybdenum and tungsten sheets for rolling. It features a unique pulse-fired combustion system.
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Reheating furnaces for blooms, slabs and billets
- car bottom, chamber and bell-type furnaces
- pusher-type furnaces
- suspended monorail furnaces with quenching and special dipping facilities for the quenching and tempering of axles, shafts and small parts
- conveyor-type quenching and tempering lines for forgings
- roller hearth furnaces for the heat treatment of wire coils
- special rotary hearth furnaces for the solution annealing and spheroidizing of CrNi steel wire coils
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This is a continuous furnace suited for production of light alloy products such as engine parts and cast aluminum wheels. The solution heat treating process is ensured by good temperature distribution achieved through hot air circulation and a fast-feeding roller hearth mechanism to transfer the work load to the quench chamber.
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