Titanium-aluminum intermetallic and manufacturing method thereof for improving casting fluidity

A method of manufacturing a titanium-aluminum intermetallic for improving casting fluidity comprising the following steps of:

• a smelting step:
• placing a plurality of smelting raw materials of the titanium-aluminum intermetallic in an induction smelting device, and melting the smelting raw materials to a molten titanium-aluminum intermetallic having casting fluidity;
• and
• a casting and curing step:
• casting the molten titanium-aluminum intermetallic to cure to a titanium-aluminum intermetallic, wherein the titanium-aluminum intermetallic comprises the following elements in atomic percentage:
• Al:
• 40 at% to 50 at%, Cr:
• 1 at% to 8 at%, Nb:
• 1 at % to 8 at %, Mo:
• 1 at % to 5 at %, Mn:
• 1 at % to 6 at %, Ni+Si+Fe:
• 1 at % to 15 at %, B:
• 0.05 at % to 0.8 a t%, and the balance of Ti and inevitable impurities.

A titanium-aluminum intermetallic for improving casting fluidity, consisting of the following elements in atomic percentage:

• Al:
• 40 at % to 50 at %, Cr:
• 1 at % to 8 at %, Nb:
• 1 at % to 8 at %, Mo:
• 1 at % to 5 at %, Mn:
• 1 at % to 6 at %, Ni+Si+Fe:
• 1 at % to 15 at %, B:
• 0.05 at % to 0.8 at %, and the balance of Ti and inevitable impurities.