Straight HTTMT makes it possible to improve the strength and fatigue characteristics of steel by almost 10%. The maximum toughening effect is attained with about 25% strain.
Repeated quenching of the steel and hardening HTTMT with the use of rapid heating after intermediate high-temperature tempering partially reestablishes the strength and improves the plastic properties of the steel obtained by straight HTTMT, and there is little decrease of the fatigue limit.
Straight HTTMT without low-temperature tempering does not provide complete “reversibility” of the properties with repeated quenching and low-temperature tempering after HTTMT.
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Bron, D.I., Levites, I.I. Properties of 55KhGR steel after high-temperature thermomechanical treatment and repeated quenching. Met Sci Heat Treat 8, 733–735 (1966). https://doi.org/10.1007/BF00686585
- Fatigue Limit
- Rapid Heating
- Thermomechanical Treatment
- Plastic Property