面向深海装备的Ti-6Al-4V合金增材制造：组织及性能研究

王怀慎; 董鹏; 汪卓然; 贾本业; 胡焱玲; 田胜云

doi:10.7512/j.issn.1001-2303.2025.03.02

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面向深海装备的Ti-6Al-4V合金增材制造：组织及性能研究
Additive Manufacturing of Ti-6Al-4V Alloy for Deep-Sea Equipment: A Study on Microstructure and Properties
2025年55卷第3期页码：7-14
收稿：2024-05-14，

修回：2024-05-27，

纸质出版：2025-03-20
DOI： 10.7512/j.issn.1001-2303.2025.03.02
稿件说明：

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王怀慎，董鹏，汪卓然，等.面向深海装备的Ti-6Al-4V合金增材制造：组织及性能研究［J］.电焊机，2025，55（3）：7-14. DOI： 10.7512/j.issn.1001-2303.2025.03.02.

WANG Huaishen, DONG Peng, WANG Zhuoran, et al.Additive Manufacturing of Ti-6Al-4V Alloy for Deep-Sea Equipment: A Study on Microstructure and Properties[J].Electric Welding Machine, 2025, 55(3): 7-14. DOI： 10.7512/j.issn.1001-2303.2025.03.02.

摘要

为解决深海装备用TC4钛合金在传统锻造和铸造加工中遇到的难题，采用激光选区熔化技术（SLM）进行TC4钛合金的制备，并对其微观组织和力学性能进行了深入研究。研究发现，SLM制备的TC4钛合金呈现针状α

马氏体组织，与传统轧制态的等轴晶粒结构有显著不同，且在SLM样品中几乎未检测到β相。SLM制备的TC4钛合金展现出了5.36 GPa的纳米硬度，显著高于传统轧制态的1.54 GPa。此外，其抗拉强度高达

1 123.9 MPa，延伸率为9.78%，尽管冲击韧性为43 J，略低于轧制态TC4的59.5 J，但依然满足国家标准要求。研究表明，SLM技术制备的TC4钛合金在力学性能上不仅满足了深海装备的应用标准，而且在某些性能上超越了传统材料，对深海装备的发展具有重要的推动作用。

Abstract

This study aims to address the challenges encountered in traditional forging and casting processes when working with TC4 titanium alloy for deep-sea equipment. The study employs Selective Laser Melting (SLM) technology for the fabrication of TC4 titanium alloy and conducts an in-depth investigation of its microstructure and mechanical properties. It was found that the TC4 titanium alloy prepared by SLM exhibits a needle-like α' martensitic structure

which is significantly different from the equiaxed grain structure of the traditional rolled state

and almost no β phase was detected in the SLM samples. The TC4 titanium alloy prepared by SLM demonstrated a nanohardness of 5.36 GPa

which is substantially higher than the 1.54 GPa of the traditionally rolled state. Moreover

it has a tensile strength of up to 1123.9 MPa and an elongation rate of 9.78%. Although the impact toughness is 43 J

slightly lower than the 59.5 J of the rolled TC4

it still meets the national standard requirements. This study indicates that the TC4 titanium alloy prepared by SLM technology not only meets the application standards for deep-sea equipment in terms of mechanical properties but also surpasses traditional materials in some aspects

playing a significant role in advancing the development of deep-sea equipment.

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references

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