“…It has been pointed out that the way of sequential transformation of carbides depends upon the original microstructure in which carbides are existing. Yukitoshi et al 18) examined the influence of original microstructures of 2.25Cr-1Mo steel upon creep properties and change in carbide morphology during high temperature exposure. The material was given three types of heat treatment prior to tests, which were Water Quenched (WQ), Oil Quenched (OQ) and Furnace Cooled (FC).…”