Abstract
This invited paper gives an overview of the process and furnace technology of controlled atmosphere furnaces and the requirements of European customers. Based on typical parts that are heat treated in atmosphere furnaces, the commonly used furnace types and their mechanical design (refractory, burners, etc.) are explained. Furthermore the required atmosphere and process control are mentioned, which is in direct correlation with the preferably used thermal and thermochemical processes. Finally quenching processes and the design of quenching devices will be discussed. An outlook to future developments of atmosphere furnaces will complete the paper. In this outlook the energy efficiency, primary measures for energy savings, and also energy recovery have a high priority and are very important to the European view in general.
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