I. Brief introduction of salt bath furnace:The salt bath furnace is a multi-finger electrode salt bath furnace. This type of salt bath furnace is composed of the following mechanisms: a shell made of steel and steel plates, a steel liner, a salt tank to prevent the penetration of molten salt, and a special design to avoid disconnection and prevent salt leakage. Electrode, equipped with special temperature automatic control cabinet, special shaped thermocouple. The electrode is inserted from the bottom side of the salt tank, and the electrode's embedded structure is used to prolong the service life of the electrode, and the two electrodes can be prevented from short-circuiting. The specially designed water-cooled jacket avoids salt leakage for long-term use. In addition, indirect heating salt bath furnace, a special crucible is installed in the furnace, and the outside is heated by a resistance heating element, which melts the salt liquid in the crucible to heat the workpiece.
Second, the use of salt bath furnace:
The salt bath furnace is mainly used for heating metal parts in the molten salt solution or mixed salt solution to perform heat treatment such as quenching, annealing, tempering, and non-oxidizing heating.
3. Working method of salt bath furnace:
The electrode salt bath furnace uses salt to heat, and the salt is not conductive in the solid state. When the salt bath furnace uses the electrode, the current generates continuous heat through the conductive dissolved salt. The electrode continuously circulates the molten salt through natural convection and electromagnetic stirring. The workpiece is continuously heated evenly. The crucible salt bath furnace indirectly heats the salt liquid inside the crucible through the electric heating element outside the crucible.
Classification of salt bath furnaces:
1. Salt bath furnace can be divided into two types according to the heating method: electrode salt bath furnace, called crucible salt bath furnace (indirect salt bath furnace)
2. The salt bath furnace can be divided into: high temperature salt bath furnace, medium temperature salt bath furnace, and low temperature salt bath furnace.