|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||General Poster Session
||O-56: The Effect of Cooling Rate on Microstructure and Physical Properties for Alloy 625 Casting
||Jaihyun Park, Yeungju Kim
|On-Site Speaker (Planned)
Interest in high-efficiency next generation power plant such as A-USC is getting increasing. The operating temperature of the high pressure turbine in the USC(ultra super critical)power generation environment is 600°C-650°C, but the A-USC power generation environment is a high efficiency power generation environment where the operating temperature of the high pressure turbine is 700°C-760℃. For this reason, it is impossible to use the austenitic heat-resistant steel which is currently used in the high-pressure turbine. Instead of it, Ni-base superalloy should be used for the high temperature usage. A variety of casting alloys that can be applied as casing components to A-USC thermal power plants are being studied worldwide and alloy 625 is one of the candidate. In this study, a modified casting alloy 625 was fabricated. The difference in microstructure and physical properties according to the cooling rate during cast solidification was analyzed.
||Planned: Supplemental Proceedings volume