CORROSION RESISTANT POWDER ALLOY HAVING EXCELLENT RESISTANCE TO HIGH TEMPERATURE CORROSIVE ENVIRONMENT SEVERE IN TEMPERATURE VARIATION AND PRODUCTION METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a corrosion resistant powder alloy which has excellent resistance to a high temperature corrosive environment severe in temperature variation such as a thermal power plant combustion furnace, and is suitable for a boiler tube or the like, and to provide a production method therefor.;SOLUTION: This corrosion resistant powder alloy has a composition containing, by mass, ≤0.04% C, 0.1 to 3.0% Si, ≤0.2% Mn, 18.0 to 24.0% Cr, 6.0 to 10.0% Mo, ≤1.9% Nb, ≤2.0% Fe, ≤0.03% P, ≤0.01% S, 0.005 to 0.05% O and ≤0.10% N, and the balance Ni with inevitable impurities, or has a composition in which one or more kinds selected from ≤0.5% Al, ≤0.5% Ti, ≤0.5% rare earth metals, ≤0.5% Y, ≤0.5% Zr and ≤0.5% Hf are selectively added to the above mentioned composition so that their total is controlled to 0.01 to 0.5%.;COPYRIGHT: (C)2003,JPO