Thermo-Mechanical Treatment of Steels | Metallurgy
In the high temperature thermo-mechanical treatment (HTMT), the steel is plastically deformed when austenite is present in its stable state just above Ae3 and then quenched to martensite state as schematically illustrated in Fig. 9.1 (a), followed by tempering at a suitable temperature. The increase in strength occurs due to refinement of austenite grains to 3-10µm. The optimum properties are [...]