How to use a vacuum atmosphere furnace and what precautions should be taken?

The use of a vacuum atmosphere furnace involves a series of steps and precautions to ensure the accuracy and safety of experiments or production. The following are detailed usage instructions and precautions:
usage method
preparation:
Ensure that the vacuum atmosphere furnace is in a clean and tidy state, and check if the equipment is working properly.
Prepare the samples or materials to be processed, and prepare the required atmosphere gases (such as argon, nitrogen, etc.) as needed.
Set parameters:
According to experimental or production requirements, set the operating parameters of the vacuum atmosphere furnace, including temperature, pressure, heating rate, etc.
Ensure that the set parameters meet the heat treatment requirements of the sample or material.
Vacuum pumping:
Put the sample into the furnace chamber and close the furnace door.
Start the vacuum pump for vacuum pumping, adjust the pumping rate and pumping time as needed, remove the gas in the furnace chamber, and establish the required vacuum degree.
Atmosphere control:
Inject the required atmosphere gas into the furnace chamber according to experimental or production requirements to establish the desired atmosphere environment.
Ensure good control of the flow rate and flow rate of the atmosphere gas.
Heating treatment:
Set the required heating curve and heating rate, and start the heating system for heating treatment.
Select appropriate heating methods and temperatures based on the characteristics of the sample or material to ensure stable and uniform heating process.
Monitoring and recording:
During the heating process, continuously monitor and record parameters such as temperature, pressure, and atmospheric gas flow inside the furnace chamber.
Timely adjust control parameters to ensure that the heating process meets experimental or production requirements.
Cooling and exhaust:
After the heating treatment is completed, gradually reduce the temperature inside the furnace chamber.
Simultaneously discharge residual gas and gradually restore the pressure inside the furnace chamber to atmospheric pressure.
After the temperature inside the furnace chamber drops to a suitable range, the furnace door can be opened to take out the sample.
matters needing attention
security check:
Before use, check if the furnace body, heating elements, sensors, vacuum pump and other components are operating properly, and perform necessary cleaning and maintenance.
Ensure effective grounding of the furnace shell for safe use; The furnace body should be placed in a well ventilated room, and flammable and explosive materials should not be placed around it.
Atmosphere control:
Strictly control the type, flow rate, and flow rate of atmospheric gases to ensure the accuracy and safety of experiments or production.
Special attention should be paid to volatile and explosive materials, and corresponding protective measures should be taken.
Temperature control:
The heating temperature and time should be strictly controlled according to the process requirements, and heating should not be adjusted or stopped arbitrarily during operation.
Pay attention to monitoring the temperature changes inside the furnace chamber to ensure stable and uniform heating process.
Vacuum degree control:
During the vacuum pumping process, pay attention to adjusting the pumping rate and pumping time to establish the required vacuum degree.
During the heating process, avoid sudden changes in the vacuum degree inside the furnace from causing damage to the sample or equipment.
Operating specifications:
During use, be careful to avoid accidents caused by improper operation. Especially during heating treatment, attention should be paid to preventing dangerous situations such as burns and fires.
After heating, wait for the temperature inside the furnace to drop to the appropriate range before opening the furnace door to take out the sample.
Regular maintenance:
Regularly inspect and maintain the vacuum atmosphere furnace, including cleaning heating elements, checking the working status of sensors and control systems, and replacing furnace membranes.
Ensure the stable operation and long-term reliability of the equipment.
Avoiding cross contamination:
When handling different samples or materials, it is important to avoid cross contamination. Appropriate measures can be taken, such as replacing work fixtures, cleaning the inner walls of the furnace chamber, etc., to ensure the purity of the sample and the accuracy of experimental or production results.
Reasonable use of consumables:
Reasonably use vacuum pumps, atmosphere gases, and other consumables to avoid waste and reduce cost expenditures. During use, the amount and flow rate of atmosphere gas can be adjusted according to experimental or production needs to improve resource utilization efficiency.
By following the above methods and precautions, the safe, efficient, and accurate use of the vacuum atmosphere furnace can be ensured.