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Vacuum Annealing
Annealing heat treatment is a procedure in which pieces are heated and then slowly cooled in order to achieve a softer structure and enhance material structure for subsequent shaping operations.
Compared to treating under atmosphere, annealing under vacuum offers the following advantages:
- avoiding inter granular oxidation (IGO) and surface oxidation
- avoiding de-carburized areas
- metallic, blank surfaces
- clean surfaces of parts after heat treatment, no washing of parts necessary
Vacuum Annealing Furnaces:
The Horizontal Vacuum Annealing Furnace is designed to heat treat reactive metal tubes and bars and their alloys under vacuum. The vertical annealing vacuum furnace is mostly used for lengthy components, such as overweight rod shaft parts, that need to undergo vacuum heat treatment, recrystallization of non-ferrous metals, or annealing ageing treatment. It is a hot, side-loading, cylindrical wall furnace with a task temperature consistency that is positioned horizontally. The furnace has three chambers: a central hot chamber, cooling chambers on either side, and a loading station and platforms with pulling/pushing mechanisms on either side.
After due cooling, charge basket is pulled back to loading platform and annealed charge is unloaded. Schematic of this furnace is given below:
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After the procedure is finished, one can download the data from the data logger and convert it into helpful data using TEMPSENS’ SmartLog Software. One can make immediate and precise judgements to address issues with the annealing process after monitoring and statistically evaluating the data, which will improve quality and productivity. Data can be obtained using a simplified data logging process in graphical mode, numerical data, and report formats.
Further Reading
- Thermal Profiling System
- Thermal Profiling – Importance in Reflow Ovens
- Thermal Profiling Importance in Ink Printing
