固溶处理对锻/增复合成形TC4钛合金件的显微组织和力学性能的影响

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中图分类号：TG146.2

DOI：10.3969/j.issn.1004-132X.2025.06.018 开放科学（资源服务）标识码（OSID）：

Effects of Solution Treatment on Microstructure and Mechanics Properties of TC4 Titanium Alloy Parts Formed by Forging/Additive Manufacturing Composite Forming

WANG Yahui1，2，3 HUANG Liangl，2 * LIU Xiang1，2 1.School of Materials Science and Engineering，Huazhong University of Science and Technology， Wuhan， 2.State Key Laboratory of Materials Processing and Die & Mould Technology，Huazhong University of Science and Technology，Wuhan， 3.Engineering Practice Innovation Center，Huazhong University of Science and Technology， Wuhan，

Abstract： Laser solid forming（LSF） technology was used to perform compound forming on the forged TC4 titanium aloy substrates. The microstructure evolution of LSF additive manufacturing areas and the joint parts of forged substrates under different solid solution heat treatment conditions and the properties of TC4 titanium alloy were studied. The results show that under the conditions of furnace cooling or air cooling，the higher the solution heat treatment temperature，the a/α ‘phase at the joints of composite forming gradually grows and coarsens. Under the condition of solution treatment at 1040∘C ，the original obvious joint zones are transformed into a homogeneous α -colony structure. With the increase of solution temperature， the yield strength and tensile strength of the composite parts decrease. The cooling mode of solution treatment has effects on the microstructure of the joint zones，the width of α phase under air cooling conditions is smaller than that under furnace cooling conditions.Under the conditions of furnace cooling，the higher the solution temperature the lower the hardness of the joint zones，and the microhardness near the joint zones is higher than that far away from the joint zones.

Key words： TC4 alloy;mechanics property; microstructure; solution treatment

0 引言

TC4钛合金是一种具有高强综合性能的 α+ β 型钛合金，具有密度小、综合力学性能优、耐腐蚀性好等优点，广泛应用于航空航天、建筑、化工等领域[1-3]。（剩余12252字）