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Metallurgical Aspects Affecting Thermomechanical Processing of Ti Based Microalloyed Steels
Abstract:
Thermomechanical processing is a well-defined route to achieve adequate combinations of strength/toughness for a wide range of applications. Inside this family, that based on accumulated strain in austenite followed by proper accelerated cooling strategies is probably one of the most selected. Usually this has been achieved with steels with Nb additions and other microalloying combinations. Recently, it has been observed an increase in the relevance of Ti as microalloying element. In addition to the classical approaches based on its availability to avoid grain growth, Ti provides, mainly in near-net-shape technologies, additional possibilities in relation to austenite conditioning and precipitation hardening. Multiple factors intervene simultaneously (solidification rates, Ti amount, Ti/N ratio, interaction with Nb...) leading nowadays, to important difficulties to properly predict its behavior. This manuscript focuses on some of these issues.
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Pages:
84-89
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Online since:
November 2016
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