Hardfacing technique and improved construction for inlet steam sealing surfaces of steam turbines

摘要

An improved steam turbine system is provided having a hardfacing disposed on a portion of its steam inlet chamber wear surfaces. The invention also includes a novel stacked ring design having a hardfaced inlet sleeve and stationary, nitride sealing rings for minimizing wear. Also included are novel heat treatments and metallurgical processes for stress relieving these hardfaced components. The techniques and designs employed, decrease steam leakage and assure longer service life for steam powered turbines.