It is used for spheroidizing annealing of bearing rings and spheroidizing annealing of bearing steel pipes. It mainly utilizes the specificity of the spheroidizing annealing process of bearings and the characteristics of heat upward movement. How much heat is required to heat up, and how much heat needs to be released for cooling, and the released heat is also used. The upper layer is fed and the lower layer is discharged, and more than 90% of the heat that needs to be released during annealing is reasonably recovered to the product for heating, and the heating uniformity of the product is improved.
And feed in and out at the same end. It is convenient for workers to load and unload materials, reduce the running of operators at both ends, and reduce the labor intensity of workers; a high-temperature lifting table is used for workpiece transfer. It can lock the furnace temperature, reduce heat loss, and at the same time save the amount of protective atmosphere, breaking the traditional straight-through furnace type with two openings.
The characteristics of the spheroidizing annealing furnace are as follows:
1. The heating method of all electricity or electricity + gas is adopted, the continuous operation mode, the whole process of heat treatment is automated, and the process can be traced back.
2. The furnace lining is made of high-quality fiber structure, which can significantly improve the thermal efficiency, high efficiency and energy saving, and reduce costs.
3. Scientific and reasonable C-shaped structure of the furnace body. The discharged workpiece is heat exchanged between the lower layer and the upper layer on the feeding and discharging table, and the upper layer workpiece is preheated to improve the heating uniformity and energy saving effect of the workpiece. The heat preservation and insulation layer is used in the furnace, which is divided into upper and lower independent furnaces. Independent temperature control improves the precision and accuracy of temperature control.
4. The feeding and discharging of the workpiece are in the same position as the design, which is designed as a ladder, which is convenient for operation. The air lock chamber and the feeding and discharging table are equipped with a waste heat drying chamber to dry the workpiece to reduce water vapor entering the furnace, reduce the decarbonization and oxidation of the workpiece, and achieve the effect of energy saving at the same time.
5. The heating element adopts the radiant tube heating method made of high-quality stainless steel, which is more convenient and fast to maintain. The control adopts regulator + temperature control instrument to improve the temperature control accuracy and uniformity in the furnace.
6. Nitrogen is used as the basic protective gas + enriched gas, and the annealed workpiece has no oxide scale.
7. The furnace body of the spheroidized annealing furnace adopts the method of welding, and there is an air lock chamber before entering and leaving the furnace. The furnace body has better sealing performance and achieves the purpose of more energy saving.
8. The main electrical components of the automatic control system are made of high-quality products and imported products.
9. Each area is controlled by dual dual table + regulator, which can better ensure the process temperature and product quality. At the same time, the thermocouple is equipped with calibration holes to ensure the temperature control accuracy requirements of the thermocouple.
10. The furnace body is equipped with a heating stirring fan to make the temperature and atmosphere in the furnace more uniform and ensure the unity of the workpiece after heat treatment.
11. Touch screen monitoring system, real-time monitoring of the working screen; station display; fault display, causes and inspection and elimination methods, fault, alarm records, process, temperature history curve and data records; in and out time records, historical temperature changes can be accessed at any time; Archive after downloading.
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