High durability nozzle for casting

Abstract

Abstract PURPOSE:To obtain a nozzle for casting of high durability by adding a binder to the mineral phase comprising mullite, batholite corundum of the specified component composition. CONSTITUTION:A raw material compound comprising 30-80 refractory raw material of the main mineral phase comprising mullite, batholite corundum and of the chemical composition of 30-60 Al2O3, 20-60 ZrO2, and 5-25 SiO2, 20- 40 graphite powder, 0-10 SiC, 0-25 molten silica and 0-45 (hereabove wt%) contraining >=70 AlO3 is mixed with a resin or pitch as a binder at an ordinary temperature or under heating. After molding, the mixture is fired in a nonoxidative atmosphere, whereby the nozzle for casting is obtained. This makes spalling resistance superior, makes corrosion resistance to powder good, obviates the cracking during use and yields good results.

Inventors

• 👤 Hiroshi Kano
• 👤 Takenobu Honda
• 👤 Nobuhiko Kaji

Bibliographic Details