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

作　　者：王怀慎 董鹏 汪卓然 贾本业 胡焱玲 田胜云 WANG Huaishen;DONG Peng;WANG Zhuoran;JIA Benye;HU Yanling;TIAN Shengyun(China Shipbuilding Group Fenxi Heavy Industry Co.,Ltd.,Taiyuan 030027,China;School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]中国船舶集团汾西重工有限责任公司,山西太原030027 [2]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《电焊机》2025年第3期7-14,共8页Electric Welding Machine

基　　金：山西省重点研发计划(202102150401003)。

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1123.9 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。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-likeα'martensitic structure,which is significantly different from the equiaxed grain structure of the traditional rolled state,and almost noβphase 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.

关 键 词：激光选区熔化技术(SLM) TC4钛合金 微观组织 力学性能 深海装备 

分 类 号：TG457.1[金属学及工艺—焊接]