Introduction to the advantages, disadvantages and indicators of hot press and hot isostatic press

What are the advantages and disadvantages of the heating method of the hot press? In addition, what are the general technical indicators in the heat press? The above two issues are what we must understand, because they are closely related to the heat press, so they are very important.

The heating methods of the hot press mainly include steam heating, electric heating and heat transfer oil heating. For steam heating, although the heating temperature rises quickly, it needs to use a pressure boiler, and the pressure in the pipeline is relatively high, and the heating temperature is prone to unevenness.

Electric heating, although it has the advantages of high heating temperature, high temperature rise and simple operation, but its power consumption is relatively large, and the cost is relatively high. Heating under normal pressure can be realized, and the heat capacity is high, the heat loss is small, and the heating temperature is relatively uniform.

There are generally two skill indicators in the hot press, which are:

Response speed: The requirement is as fast as possible, which can improve the production efficiency of the machine.

Welding accuracy: The higher the requirement, the better, which is beneficial to the accuracy of the operation.

Hot pressing and hot isostatic pressing are the methods of choice of achieving high density in parts designed for demanding applications or prepared from materials that are difficult to densify by other means. Pressure enhances the rate of densification at a given temperature and so densification can be completed in shorter times and at lower temperatures than conventional sintering. A benefit of the enhanced densification kinetics is final materials with lower grain size, because pressure does not affect the rate of grain growth. However, the equipment and tooling are more complex, the operation is inherently batch rather than continuous, and the processes overall are more expensive than the sequential approach of compaction followed by conventional sintering.