Annealing box
A closed container in which the workpiece is protected from oxidation and scale formation during the annealing process.
Physical-Chemical Mechanism of Action
The annealing box protects the workpiece from air and moisture, which could cause oxidation and scaling. It enables a controlled environment with a defined gas composition, improving the quality of the annealing process.
Metallurgical Relevance & Welding Risks
Without an annealing box, the workpiece can quickly oxidize or scale. This leads to quality issues such as porosity, loss of strength, and uneven stress state in the workpiece. A faulty gas composition can also cause unwanted chemical reactions.
Workshop Practice & Action Guidelines
Ensure the annealing box is clean and dry before loading the workpiece. Use the correct gas composition (e.g., argon or nitrogen) and ensure proper pressure regulation. Keep the temperature constant and monitor the annealing process continuously.