C214 Trial manufacturing and mechanical property evaluation of steam turbine valve model for advanced ultra super critical power generation system

Abstract

A 血ll size steam turbine valve mode1 for 7eO℃ class advanced ultra super critical steam turbine power generation system was m 既 u ねGtured by Nickel based casUng alloy l 「 ASTM A494 CW6MC " ． Tho valv 。 model was manufactured by double melt process ( Electro fUrnace and AOD ) and casted in atmosphere ． AUoy compQsition and tensile properties ofthe valve model were satisfied with a speeification of the castillg alloy ． 700 °C ・ 105 hours creep rupture strength of the valve model was 80MPa or more ，