|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Effects of Simulated Post-weld Heat Treatment on Microstructure and Mechanical Properties of 1.25Cr-0.5Mo Steel
||Yang Shen, Cong Wang
|On-Site Speaker (Planned)
1.25Cr-0.5Mo steel has been now widely used to manufacture petrochemical and petroleum refining equipment and other large devices. It is of great significance to study the performance of simulated post-weld heat treatment (SPWHT) state steel plate to improve the performance of the whole weld assembly. In present work, the effects of SPWHT on the microstructure and mechanical properties of 1.25Cr-0.5Mo steel have been systematically studied.
It is found the microstructure of 1.25Cr-0.5Mo steel under both QT state and SPWHT state are composed of bainites and carbides. With further extension of holding time, M<SUB>7</SUB>C<SUB>3</SUB> carbides with hexagonal structure transform into M<SUB>23</SUB>C<SUB>6</SUB> carbides with a face-centered cubic structure. Through series Charpy impact test, it has been known that the ductile-brittle transition temperature is -18°C. Compared with QT state, the yield strength and tensile strength of SPWHT state decrease from 420MPa and 550MPa to 380MPa and 510MPa, respectively.
||Planned: Supplemental Proceedings volume