The difference between internal and external quenching lies in the location of the quenching components and the method used for cooling the workpiece.
In internal quenching, the quench blower and heat exchanger are contained within the vacuum heating chamber. This means that the workpiece is heated in the chamber and then the quenching process takes place within the same chamber. This design allows for a more compact setup and efficient transfer of heat from the workpiece to the cooling medium.
On the other hand, in external quenching, the blower housing, heat exchanger housing, and quench piping are located outside the vacuum heating chamber. This means that the workpiece is heated in the chamber and then transferred to an external cooling chamber where the quenching process occurs. This design allows for a larger and more flexible cooling system, as the cooling medium can be varied during a given cycle to accommodate different materials or desired properties.
Both internal and external quenching can be used for gas quenching and liquid quenching. Gas quenching involves heating the workpiece in a vacuum and then cooling it in a cooling chamber with a high purity neutral gas, such as nitrogen. This method is suitable for materials like high-speed steels and high carbon and high chromium steels. Liquid quenching, on the other hand, involves heating the workpiece in a heating chamber and then moving it to a cooling chamber filled with high purity nitrogen. The workpiece is immediately fed into a quenching oil bath for rapid cooling. Liquid quenching is used when high surface quality is required.
In summary, the main difference between internal and external quenching is the location of the quenching components and the method used for cooling the workpiece. Internal quenching involves quenching within the vacuum heating chamber, while external quenching involves transferring the workpiece to an external cooling chamber. The choice between internal and external quenching depends on factors such as the materials being processed, desired properties, and cooling requirements.
Looking for reliable laboratory equipment for internal or external quenching? Look no further than KINTEK! Our high-quality quenching systems are designed to meet your specific needs. Whether you prefer internal or external quenching, our equipment ensures rapid and uniform cooling of your workload. Trust KINTEK for all your laboratory equipment needs. Contact us today for more information!
