| abstract |
A blast-furnace tuyere having excellent thermal-shock resistance and high durability consists of a tuyere substrate composed of copper or copper alloy, a nickel or cobalt base self-fluxing alloy metallized layer sprayed on the said substrate, a zirconia or alumina base cermet layer sprayed on the said alloy metallized layer and a zirconia or alumina ceramic coating layer sprayed on the said cermet layer. |