Novel hard alloy cold forging die for combined gear ring

The invention discloses a novel hard alloy cold forging die for a combined gear ring. The hard alloy cold forging die comprises a tooth-shaped female die and a prestress outer ring arranged on an outer ring of the tooth-shaped female die, wherein the tooth-shaped female die has a split structure, and comprises a tooth-shaped die core and a lower die core; the tooth-shaped die core wraps the lower die core; and the prestress outer ring wraps the tooth-shaped die core. Compared with the prior art, the hard alloy cold forging die has the advantages that the tooth-shaped die core has a split structure, so that the defect that the die is cracked early due to stress concentration at a sharp corner of the die is overcome, and the service life of the die is prolonged; and the die is made of a hard alloy material, so that tooth-shaped elastic deformation is small, the tooth-shaped accuracy can be ensured, and the anti-wearing performance can also be improved greatly.