High temperature vacuum well type annealing furnace

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After the high temperature vacuum well annealing furnace is used for the first time or not for a long time, it should be baked for 1 hour at 120 ℃ or 2 hours at 300 ℃ to avoid furnace cracking. The furnace temperature shall not exceed the rated temperature of rotary arm well type annealing furnace as far as possible, so as to avoid damage to heating elements and furnace lining.

1. It is forbidden to directly pour various liquids and dissolved metals into the furnace to keep the furnace clean.

2. If the furnace adopts quartz tube, when the temperature is higher than 1000 ℃, the part of high temperature vacuum well type annealing furnace of quartz tube will appear opaque phenomenon, which is called the loss of permeability (also called crystallization) of rotary arm type vacuum annealing furnace. It is an inherent defect of continuous melting quartz tube, which is a normal phenomenon.

3. When using the cold furnace, because the furnace is cold and needs a lot of heat absorption, the temperature rise rate in the low-temperature section is not easy to be too fast, and the temperature rise rate difference in each temperature section is not easy to be too large. When setting the temperature rise rate, the physical and chemical properties of the sintered material shall be fully considered to avoid the occurrence of spraying phenomenon and pollution of the furnace tube.

4. Regularly check whether the contact of the electrical connection part of the temperature control system is good, and pay special attention to whether the connection points of the heating elements are tight.

5. After the high temperature vacuum well annealing furnace has been used for a period of time, if the vacuum degree is reduced, the temperature resistant silicon rubber ring between the stainless steel flange plates can be replaced respectively or the stainless steel flange plates can be reinstalled or the vacuum system can be replaced and repaired to improve the overall vacuum degree of the system.

6. In the working process, if the control deviation cannot be eliminated at about 300 ℃, the temperature display value does not match the value given by the program or the swing is too large, check whether the parameter “M5, P, t” is set accurately.

7. High temperature vacuum well type annealing furnace is applicable to the following working conditions:
(1) The ambient temperature is between – 10 ℃ and 75 ℃.
(2) The relative humidity of the surrounding environment shall not exceed 85%.
(3) There is no conductive dust, explosive gas and corrosive gas that seriously damages metal and insulating materials around the furnace.
(4) There is no obvious tilt, vibration and turbulence.