| 摘要 |
A nozzle for the production of steel wires having a small diameter by the extruding of a molten steel under pressure through the nozzle is made essentially of zirconia(ZrO2), possibly containing a small amount of magnesia and/or a rare earth oxide selected in such a manner that, in the presence of silicon and/or silica, it does not give rise to silicates of low melting point, said oxide preferably being yttrium oxide (Y2O3). |
