Precautions for the use of vacuum heat treatment equipment box-type resistance furnace

Precautions for the use of vacuum heat treatment equipment box-type resistance furnace

1. The refractory material of the new furnace contains moisture. In addition, in order to form an oxide layer on the heating element, before starting to use, it must be baked at a low temperature for several hours and gradually heated to 900 ° C, and kept for more than 5 hours to prevent the oven. The furnace of the resistance furnace is broken due to the rapid change of temperature after being damp.

2. When the resistance furnace is heated, the furnace jacket will also become hot, the furnace should be kept away from flammable materials, and the outside of the furnace should be easily dissipated.

3. The working life of the heating element depends on the oxide layer on its surface. Destruction of the oxide layer will shorten the life of the heating element, and each shutdown will damage the oxide layer, so the shutdown should be avoided after starting the machine.

4. The furnace temperature should not exceed a higher temperature during use, so as not to burn the electric heating element, and it is forbidden to pour various liquids and molten metals into the furnace.

5. When doing the ashing test, the sample must be fully carbonized on the box-type resistance furnace first, and then put into the ashing furnace to prevent the accumulation of carbon from damaging the heating element.

6. After several cycles of heating, cracks may appear in the insulation material of the furnace. These cracks are caused by thermal expansion and have no effect on the quality of the furnace.

7. The resistance furnace is an experimental product and should not be used for other purposes. The sample must be placed in a clean crucible, and the furnace must not be polluted.

8. When using the resistance furnace, you should take care of it frequently to prevent accidents caused by failure of automatic control. Do not use the resistance furnace when there is no one on duty at night.

9. After the resistance furnace is used, the power supply should be cut off to allow it to cool down naturally. The furnace door should not be opened immediately to prevent the furnace from being suddenly cooled and broken. If it is urgently needed, a small slit can be opened first to speed up the cooling, and the furnace door can be opened only when the temperature drops below 200 °C.

10. When using the box-type resistance furnace, pay attention to safety and beware of burns.

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