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采用3吨TC25钛合金铸锭,3,150吨水压机、200kW电炉等装备研制了Φ420/Φ320×50规格锻环,并研究分析了不同工艺方案对应的显微组织和力学性能。研究表明,具有等轴组织、网篮组织和三态组织的TC25钛合金锻环的主要力学性能均可达到研制目标值要求,且与BT25钛合金实物水平相当。等轴组织断裂韧性较低;网蓝组织塑性和热稳定性差;采用三态组织的TC25钛合金锻环的主要性能可达到Rm:1080MPa,A5:17%,Z:43%,R-C方向KIC:88.3MPa·m1/2,550℃Rm:720MPa,550℃/100h热暴露后δ:12.5%,且组织均匀性好,稳定满足目标值要求,可满足航空发动机用材要求。
The Φ420 / Φ320 × 50 forging ring was developed with 3 tons TC25 titanium alloy ingot, 3,150 tons hydraulic press, 200 kW electric furnace and other equipment. The microstructure and mechanical properties corresponding to different technological schemes were studied. The research shows that the main mechanical properties of TC25 titanium alloy forging ring with equiaxed, net basket and tri-state can reach the target value of development, and it is equivalent to BT25 titanium alloy. The fracture toughness of isostructure is lower; the net plasticity and thermal stability of net blue are poor; the main properties of TC25 titanium alloy forging ring with tri-state structure can reach Rm: 1080MPa, A5: 17%, Z: 43% 88.3MPa · m1 / 2,550 ℃ Rm: 720MPa, 550 ℃ / 100h After heat exposure δ: 12.5%, and the organization uniformity is good, stable and meet the target value requirements to meet the aircraft engine timber requirements.