double tempering
double tempering
[¦dəb·əl ′tem·pər·iŋ] (metallurgy)
A technique for ensuring the stability of the microstructure of a quench-hardened steel by subjecting it to two tempering cycles at approximately the same temperature.
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For large production lots of verification specimens (1200 specimens or more), additional steps can be used to fine-tune the process, such as double tempering, stress relief, cryotreatment, etc.
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