Cooling Rate Effects on the As-Cast Titanium Nitride Precipitation Size Distribution in a Low-Carbon Steel

Abstract

With high yield strength, toughness and good weldability, microalloyed steels are widely used in the automotive, pipeline and transportation industries. An understanding of the thermodynamics and kinetics of microalloy precipitation during casting and cooling can be important to microstructure control. Titanium nitride (TiN) precipitation is considered here, as TiN has high stability and may precipitate at temperatures near the liquidus. Titanium nitride precipitates may remain stable at elevated temperatures during later processing, suppressing grain growth during solid state processing or in weld heat-affected zones. Smaller precipitates have a greater effect on the grain boundary pinning and therefore the TiN size distribution is important.

Department(s)

Materials Science and Engineering

Keywords and Phrases

HSLA; Continuous Casting; Cooling Rate; Titanium Nitride Precipitation; Gleeble ® 3500

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 Association for Iron & Steel Technology (AIST), all rights reserved.

Publication Date

01 Jun 2014

Link to Full Text

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