The Effect of Microstructure on the Mechanical Properties of X80 Microalloyed Steel

摘要

The aim of this study was to determine the relationship between microstructure and work hardening characteristics of an X80 microalloyed steel. An interrupted thermal treatment (ITT) process was applied in a Gleeble thermal-mechanical simulator to generate a variety of microstructures in various fractions and morphologies. Scanning electron microscopy and transmission electron microscopy were used to investigate the resulting microstructures, which were primarily bainitic, ferritic and martensitic. The effect of cooling rates, interrupt temperature, re-heat temperature and hold times were investigated and the microhardness was correlated to microstructural features.