INTRODUCTION TO INCONEL ALLOY 740: AN ALLOY DESIGNED FOR SUPERHEATER TUBING IN COAL-FIRED ULTRA SUPERCRITICAL BOILERS
Chinese utilities as well as those worldwide are facingincreased demand for additional electric-ity, reduced plant emissions and greater efficiency.To meet this challenge willrequire increas-ing boiler temperature,pressure and coal ashcorrosion resistance of the materials of boiler construction of future coal-fired boilers. A new nickel-based tube alloy, INCONELRalloy 740,is described aiming at meeting this challenge. Emphasis will be on describing the alloy s mechanical properties, coal-ash and steam corrosion resistance.Microstructural stability as a function of temperature and time is addressed as well as some of the early methodology employed to arrive at the current chemical composition.
作 者： S.J. Patel 作者单位： Special Metals Corporation, Huntington, WV 25705, USA 刊 名： 金属学报（英文版） ISTIC EI 英文刊名： ACTA METALLURGICA SINICA 年，卷(期)： 2005 18(4) 分类号： O6 关键词： ultrasupercritical boiler tubing INCONEL coal-fired