The temperature of vacuum atmosphere heat treatment cannot be raised

07-14-2025       Author: KJ technology

The temperature of the vacuum atmosphere heat treatment furnace cannot rise, which may be caused by heating element failure, power supply system problems, vacuum system abnormalities, temperature control system deviations, improper equipment design or operation, and other factors. The following are specific analysis and solutions:

1. Heating element malfunction

Phenomenon: Heating element aging, short circuit or damage, resulting in insufficient heating power.

resolvent:

Check the resistance value of the heating element to confirm if it is within the normal range.

Observe whether there is any obvious fracture, deformation, or ablation of the heating element.

If necessary, replace the heating element.

2. Power supply system issues

Phenomenon: Unstable power supply voltage or power supply line failure, resulting in insufficient heating power.

resolvent:

Use a voltmeter to check the power supply voltage and ensure that the voltage is stable around the rated value.

Check the power supply circuit for aging, damage, or poor contact, and promptly repair or replace it.

3. Abnormal vacuum system

Phenomenon: Vacuum pump failure or vacuum system leakage leads to insufficient vacuum in the furnace, affecting heating efficiency.

resolvent:

Check the operating status of the vacuum pump to confirm if it is working properly.

Use a vacuum gauge to check the vacuum level inside the furnace and confirm if it meets the process requirements.

Check if there are any leaks in the connection parts of the vacuum system and repair them in a timely manner.

4. Deviation of temperature control system

Phenomenon: The thermocouple is damaged or has a large error, causing the temperature control system to be unable to accurately control the temperature.

resolvent:

Check the connection status of the thermocouple to ensure good contact.

Use a standard thermometer to calibrate the thermocouple and confirm its accuracy.

If necessary, replace the thermocouple.

5. Improper equipment design or operation

Phenomenon: Unreasonable furnace design, dense placement of workpieces, or poor thermal circulation result in uneven temperature distribution or slow heating.

resolvent:

Optimize the loading method of workpieces, maintain sufficient spacing, and avoid mutual obstruction between workpieces.

Regularly conduct furnace temperature uniformity tests and adjust the heating system based on the test results.

Follow the equipment operating procedures to avoid equipment malfunctions caused by unauthorized operations.