| 摘要 |
An alloy for use in contact with highly corrosive combustion gases, containing V, Na, S and Cl consists of, in weight percent: 40 - 60% Co, 15 - 35% Cr, 5 -15% Fe, 0.5 - 4% Mo, 0.5 -5% W, up to 0.05% C, 0.02 - 0.5% Si, 0.02 - 0.5% Mn, 0.0003 - 0.005% Ca and the remainder of Ni with a minimum of 4%. The contents of Cr, Ni and Mo should satisfy the relation Cr(%) + 0.5 Ni(%) + 3 Mo(%) >/= 30 A composite steel tube with good corrosion resistance in the above-mentioned environment consists of an inner tube, made from a Cr-containing steel and an outer tube, made of the alloy described here before. |
