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The Book of Terms

Vacuum Annealing

Vacuum is best characterized as a lack of atmosphere (e.g., air, oxygen or other gases). Hence when metals or alloys are heated to high temperatures in a vacuum furnace, there is essentially no oxygen present to oxidize and discolor the surface of the material. Note: vacuum annealing is not conducive to strand annealing (e.g., uncoiling, heating and recoiling).

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