Understanding the difference between internal and external quenching is crucial for anyone involved in the process of cooling workpieces.
What is the difference between internal and external quenching? (4 Key Points)
1. Location of Quenching Components
Internal quenching involves placing the quench blower and heat exchanger within the vacuum heating chamber.
External quenching, on the other hand, locates these components outside the vacuum heating chamber.
2. Method of Cooling
In internal quenching, the workpiece is heated and then cooled within the same chamber.
External quenching requires transferring the heated workpiece to an external cooling chamber for the quenching process.
3. Types of Quenching
Both internal and external quenching can be used for gas quenching and liquid quenching.
Gas quenching involves cooling the workpiece with a high purity neutral gas, such as nitrogen.
Liquid quenching involves rapid cooling in a quenching oil bath.
4. Application and Flexibility
Internal quenching offers a more compact setup and efficient heat transfer.
External quenching provides a larger and more flexible cooling system, allowing for variations in cooling medium during a cycle.
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