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

doi:10.3969/j.issn.1004-132X.2025.06.018

摘要/Abstract

摘要： 采用激光立体成形技术（LSF）在锻造TC4钛合金基体上进行锻/增复合成形，研究不同固溶热处理条件下LSF增材区域和锻造基体结合部分的微观组织演变以及复合成形TC4钛合金件的性能。结果表明，在炉冷或者空冷条件下，固溶热处理温度越高，复合成形结合处的α/α′相逐渐长大变粗，且在1040 ℃固溶处理条件下，原本较为明显的分界转变为一体的α片层组织；随着固溶温度升高，复合成形件的屈服强度和抗拉强度均下降；固溶处理的冷却方式对结合处的微观组织有影响，空冷得到α相宽度小于炉冷的α相宽度；在炉冷条件下，固溶温度越高，结合处的硬度越低，且结合处附近的微观硬度要高于远离结合处的硬度。

关键词: TC4钛合金, 力学性能, 微观组织, 固溶处理

Abstract: Laser solid forming(LSF) technology was used to perform compound forming on the forged TC4 titanium alloy 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 α / α ' phase at the joints of composite forming gradually grows and coarsens. Under the condition of solution treatment at 1040 ℃, 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

中图分类号:

TG146.2

王亚辉1, 2, 3, 黄亮1, 2, 刘翔1, 2. 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[J]. 中国机械工程, 2025, 36(06): 1314-1321.

WANG Yahui1, 2, 3, HUANG Liang1, 2, LIU Xiang1, 2. Effects of Solution Treatment on Microstructure and Mechanics Properties of TC4 Titanium Alloy Parts Formed by Forging/Additive Manufacturing Composite Forming[J]. China Mechanical Engineering, 2025, 36(06): 1314-1321.

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链接本文: https://www.cmemo.org.cn/CN/10.3969/j.issn.1004-132X.2025.06.018

https://www.cmemo.org.cn/CN/Y2025/V36/I06/1314

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