| 摘要 |
A hanger (1) in a combustion chamber in a combustion plant, such as a refuse incineration plant or a combustion plant in a power station has a surface which is exposed to corrosive influence from the combustion products. The surface material is a hot-corrosion-resistant nickel and chromium containing material made from a particulate starting material which by a HIP process has been unified to a coherent material substantially without melting the starting material. In terms of per cent by weight and apart from the common impurities and inevitable residual amounts of deoxidizing components the corrosion-resistant material comprises from 38 to 75 % Cr, at the most 0.15 %, at the most 1.5 % Si, at the most 1.0 % Mn, at the most 0.2 % B, at the most 5.0 % Fe, at the most 1.0 % Mg, at the most 2.5 % Al, at the most 2.0 % Ti, at the most 8.0 % Co, at the most 3.0 % Mb and a balance of Ni, the aggregate contents of Al and Ti amounting at the most to 4.0 %, and the aggregate contents of Fe and Co amounting at the most to 8.0 %, and the aggregate contents of Ni and Co amounting at the least to 25 %. The corrosion-resistant material has a hardness of less than 310 HV measured at approximately 20 DEG C after the material has been heated to a temperature within the range of 550-850 DEG C for more than 400 hours. |
