Nozzle for making steel and method for manufacturing the same
 A funnel shaped nozzle and a method for manufacturing the same, in which the nozzle is easily manufactured at a low cost, reduced in destabilization of a base material and has a high corrosion resistance. In carrying out the invention, a baked nozzle mainly composed of completely, or partially-stabilized zirconia, is impregnated with a solution that allows unstabilized zirconia to be precipitated or separated by heat. By heating the nozzle and coating an open surface of a component particle of base material with unstabilized zirconia, a nozzle reduced in destabilization of a base material and having a high corrosion resistance is obtained. As it is not required to produce a two-layered molding, production is facilitated, and a manufacturing cost is reduced, because a small amount of unstabilized zirconia is used. 
B
B22D
inventional
Masanobu Toshio Seijiro
Saito Yamane Tanaka