Box furnace maintenance instructions

The box furnace is mainly used for normalizing, quenching, annealing and other heat treatment of alloy steel products, various metal parts, or high temperature sintering of cutting blades such as diamond. Widely used in ceramics, metallurgy, electronics, glass, chemical industry, machinery, refractories, new material development, special materials, building materials and other fields of production and experiment.

Precautions for box furnace maintenance

1. After the furnace is used or not used for a long time, it shall 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 to avoid damage to heating elements and furnace lining. It is forbidden to directly pour various liquids and dissolved metals into the furnace to keep the furnace clean.

2. 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 materials shall be fully considered to avoid the occurrence of spraying phenomenon and furnace pollution.

3. 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.

4. In the working process, if the control deviation cannot be eliminated at about 200 ℃ ~ 300 ℃, the temperature display value is inconsistent with the program value or the swing is too large, check whether the parameter "M5, P, t" is set accurately.

5. The box furnace is suitable for 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.