| 摘要 |
The present invention provides a method to manufacture a lance nozzle capable of improving durability. According to an embodiment of the present invention, the method to manufacture the lance nozzle comprises: a casting step of primarily manufacturing the lance nozzle by casting, wherein the lance nozzle includes a plurality of discharge pipes discharging gas supplied through an inlet to an outlet, and a plurality of discharge holes individually connected to the outlet of the discharge pipe; and a forging step of forming a forging tissue by forging a circumference of the discharge hole on a front surface of a front wall located on an opposite side to the discharge pipe. In the casting step, a closing member is formed inside the discharge pipe, and the rest except for a front end in the discharge pipe is closed by the closing member. In the forging step, a forging process is performed while the closing member is formed. |
