What is the use of the heat insulation layer of the vacuum heat treatment furnace
The heat insulation layer is one of the important parts of the vacuum heat treatment furnace heating chamber. Generally speaking, the heat insulation layer is made into a cylinder as far as possible. From the perspective of heat transfer science, the heat transfer effect of the cylinder structure is good, and the heat loss is small. The inner dimension of the heat insulation layer is the size of the furnace chamber, which is mainly determined by the shape, size of the workpiece being processed and the production division of the furnace. In addition, the heating effect of the vacuum heat treatment furnace, the uniformity of the furnace temperature, and the convenience of maintenance and discharging operations should also be taken into account. Generally, the distance between the inner surface of the heat insulation layer of the vacuum heat treatment furnace and the heater is about 50 to 100 mm, and the distance between the heater and the workpiece, fixture or basket should be about 50 to 150 mm.
The material and thickness of the heat insulation layer of the vacuum heat treatment furnace are generally determined by the vacuum degree and working temperature of the furnace. What is the purpose of such a vacuum heat treatment furnace heat insulation layer?
In fact, the purpose of the heat insulation layer of the vacuum heat treatment furnace is very simple. It can be seen literally that it is the place where the workpiece is heated. The heat insulation layer of the vacuum heat treatment furnace can be divided into five types according to the different materials and structural forms: refractory lining, interlayer heat insulation layer, all-metal anti-radiation screen, mixed felt heat insulation layer and graphite felt heat insulation layer.