Used for pre-heat treatment of large capacities of metal parts
Normalizing and annealing are the most widely applied processes in the heat treatment industry. When ordinary normalizing workpiece in pile to cooling, the temperature difference between inside and outside is large, and the workpiece or sections with fast cooling speed form the grain Bainite structure; However, the workpiece or sections with too slow cooling rate precipitate too much proeutectoid ferrite, resulting in uneven structure and hardness. So isothermal normalizing furnace has solved this problem. There are pusher type, roller type, ring type, etc. for option.
Product details
- product dimensionscustomized according to user needs
Isothermal normalizing heat treatment helps improve the cutting performance of the workpiece and the final heat treatment deformation
TThe isothermal normalizing line is generally composed of a lift-type transfer car, a pusher type (roller type, ring type) heating and holding furnace, a pusher type (roller type, chain type) fast cooling chamber, a fast cooling fan and a reversing device, trays transferring car, pusher type (roller type, ring type) isothermal furnace, pusher type (roller type) air cooling table, automatic flipping table, electrical control system, etc.
Isothermal normalizing can achieve a uniform balanced structure and a controlled range of hardness values, which is beneficial to improve the cutting performance of the workpiece and the deformation during the final heat treatment.
Fast Cooling Chamber
Fast cooling chamber is the key equipment of isothermal normalizing plant. The rapid cooling air supply & exhaust system consists of high temperature fan motor, electric gate valve, pipe, vent pipe, indoor air guide, etc.
The workpiece temperature is measured by imported infrared temperature measurement sensor. Outlet air temperature is measured by thermocouples.
fast cooling rate and workpiece temperature are precisely controlled through coordinated operation of infrared temperature sensors, electric butterfly valves and PLC-based fast cooling air supply & exhaust system. When the workpiece temperature exceeds the set value, hot air is directly discharged to achieve intensive cooling. Once the temperature drops to the preset level, hot air is partially or fully circulated internally via automatic electric butterfly valves for mild cooling, realizing fully controllable cooling of workpieces.
The fast cooling chamber which useing nitrogen protect atmosphere needs heat exchanger to achieve fast cooling.
Meet the need for continuous normalizing heat treatment production of large batches of workpieces, with balanced heat treatment effects and highly consistent product quality.
The main furnace adopts a roller hearth structure, with heating elements distributed up and down, ensuring uniform temperature throughout; the workpiece supports bi-directional movement, making operation and maintenance easy and efficient, significantly reducing the difficulty of equipment troubleshooting.
Our company independently developed an ring hearth waste heat isothermal normalizing production line, which can seamlessly connect with international mainstream forging automation production lines, offering strong adaptability. The equipment has a high level of automation, efficiently using forging waste heat for process machining, resulting in outstanding energy-saving and consumption-reduction effects, with a greater advantage in being green and efficient.
Configure vacuum lock chambers before and after the production line, equipped with nitrogen-based protective atmosphere heating and air-cooled tubular rapid cooling process, with independent and precise temperature control in each zone. This can promote the fine and uniform precipitation of carbides in the workpiece, effectively suppress oxidation and decarburization phenomena, optimize the microstructural organization, and lay an excellent process foundation for the subsequent ultimate heat treatment of the bearing.
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