Rapid annealing RTP tube furnace temperature cannot rise

The inability to increase the temperature of the RTP tube furnace during rapid annealing may be caused by various factors such as low set temperature, heating element failure, abnormal temperature control system, power or circuit problems, improper process parameter settings, equipment aging or insufficient maintenance. The following are specific analysis and solutions:

1. Common cause analysis
Set temperature too low:
If the set temperature is lower than the actual required temperature, the temperature inside the furnace will naturally not rise.
Heating element malfunction:
Heating elements (such as resistance wires) may not function properly due to aging, breakage, or poor contact, resulting in the inability to increase the temperature inside the furnace.
Abnormal temperature control system:
The temperature sensor may be damaged or displaced, resulting in inaccurate temperature measurement, and the temperature controller cannot adjust the heating power according to the actual temperature.
The temperature controller itself may malfunction and cannot output control signals correctly.
Power or wiring issues:
Failure to properly plug in the power plug, blown fuses, or blown fuses in the control circuit can all cause the device to fail to supply power properly.
Low power supply voltage or three-phase power supply phase loss may also affect heating power.
Improper setting of process parameters:
Setting the heating rate too fast or too slow may affect the heating efficiency. Especially for cold furnace start-up, if the heating rate is too fast, it may cause the furnace to absorb too much heat and the temperature to rise slowly.
Some materials may undergo phase transitions or chemical reactions at specific temperatures, absorbing large amounts of heat and making it difficult to raise the temperature.
Equipment aging or insufficient maintenance:
After prolonged use, components such as heating elements and temperature sensors may age and their performance may decrease.
Ash accumulation or impurities in the furnace may affect the heat conduction efficiency.

2. Solution method
Check the set temperature:
Confirm whether the set temperature meets the process requirements and make adjustments if necessary.
Check the heating element:
Open the furnace door and observe whether the heating element is broken or aged. If necessary, replace the heating element.
Check if the connection points of the heating element are securely fastened to ensure good contact.
Check the temperature control system:
Check if the temperature sensor is damaged or displaced, and replace or adjust it if necessary.
Check if the temperature controller is working properly, and repair or replace it promptly if there is a malfunction.
Check the power supply and wiring:
Confirm that the power plug is plugged in properly and that the fuse and control circuit fuse are not blown.
Use a multimeter to check if the power supply voltage and three-phase power supply are normal, and adjust or repair them if necessary.
Adjust process parameters:
Reasonably set the heating rate based on material characteristics and process requirements. For cold furnace start-up, a segmented heating method can be used, where the temperature is first raised at a lower rate to a certain temperature, and then the heating rate is accelerated.
Avoid adding materials or substances that may absorb a large amount of heat during the temperature rise process.
Strengthen equipment maintenance:
Regularly clean the accumulated ash and impurities in the furnace to maintain its cleanliness.
Regularly check the performance of heating elements, temperature sensors, and other components, and replace aging or damaged parts in a timely manner.