锻压技术

TC4钛合金风扇转子叶片模锻工艺和性能研究

英文标题：Research on die forging process and mechanical properties of titanium alloy TC4 fan propeller blade

作者：余小鲁李付国

单位：安徽工程科技学院机械系高性能有色金属材料省级重点实验室西北工业大学材料科学与工程学院

关键词：钛合金叶片锻造工艺力学性能

分类号：TG146.2

出版年,卷(期):页码：2010,35(3):19-21

摘要：

研究了TC4钛合金风扇转子叶片的锻造加热工艺、模锻成形及热处理工艺。在叶片的各部位进行了室温和400 ℃拉伸试验、冲击试验、400 ℃持久试验，综合评价了模锻叶片的加工性能和叶片各部位的性能。结果表明，叶片各部位的力学性能分布较均匀，叶身的强度比叶顶和榫头的略高，塑性水平基本相同，即室温下三者的σ_b均值分别为966，962和963 MPa，σ_0.2分别为916，905和912 MPa，δ₅约为15%，ψ约为47%；400 ℃下σ_b均值分别为669和643 MPa，δ₅约为16%，ψ约为67%。整体叶片具有均匀、良好的冲击性能，α_kv，HB(d)均值分别为0.46 MJ·m^-2，3.47 mm。同时，叶片在大载荷（σ为560 MPa）下具有良好的持久寿命（τ大于101 h）。

The heating procedure, die forging and heat treatment process of TC4 titanium alloy fan propeller blade were studied. The process ability and properties of the blade were comprehensively evaluated by tensile tests under room-temperature and 400 ℃ impact tests, endurance tests under 400 ℃ in all four main parts of the blade. The results show that the distribution of mechanical properties is even in the blade. The intensity of blade body is slightly higher than that of blade top and root, their plasticity level is uniform. Namely, the mean values of σ_b at room temperature are 966, 962 and 963 MPa respectively，the mean values of σ_0.2 are 916, 905 and 912 MPa respectively，the values of δ₅ and ψ are about 15% and 47% separately. The mean values of σ_bat 400 ℃ are 669 and 643 MPa, respectively，the values of δ₅ and ψ are about 16% and 67% separately. The whole blade has uniform, favorable impact property,and the mean values of α_kv and HB(d) are 0.46 MJ·m^-2，3.47 mm respectively. Meanwhile, the blade has satisfactory enduring life (more than 101 h) under large load (560 MPa).

基金项目：

安徽省高等学校省级自然科学研究项目（KJ2009B134）

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