用新型铸造热锻模具钢和负压成型法制成半轴法兰模、护刃器模、连杆模和五速齿轮模 ,并进行了现场应用 ,铸造热锻模具断裂失效分析 ,测试了各模具的HRC、αK、K1C,探讨了影响铸造热锻模具早期断裂失效的关键性能指标。 The semi-axial flange die, guard blade die, connecting rod die and five-speed gear die were made by the new casting hot forging die steel and the negative pressure forming method. The field application, the failure analysis of the die forging hot die, The HRC, αK and K1C of the die were discussed, and the key performance indexes that affected the early failure of the die forging hot forging were discussed.