工艺参数对激光选区熔化制备生物医用Ti-15Mo合金组织及性能的影响

朱红梅, 沈少凡, 王云飞, 潘存良, 罗浩

doi:10.16577/j.issn.1001-1560.2025.0078

材料保护 >

2025 , Vol. 58 >Issue 5: 72 - 81

DOI: https://doi.org/10.16577/j.issn.1001-1560.2025.0078

激光表面改性技术专栏

工艺参数对激光选区熔化制备生物医用Ti-15Mo合金组织及性能的影响

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1.南华大学超常环境下装备安全服役技术湖南省重点实验室 2.新乡学院3D打印学院

罗浩(1987－)，博士，副教授，主要研究方向为激光增材制造金属材料，E-mail:624879420＠qq.com

收稿日期: 2024-12-09

修回日期: 2025-01-08

录用日期: 2025-01-10

网络出版日期: 2025-06-10

基金资助

国家自然科学基金(52375341)；河南省高等学校重点科研项目(25A430037)

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Influence of Processing Parameters on the Microstructure and Properties of Biomedical Ti-15Mo Alloy Fabricated by Laser Selective Melting

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(1.Hunan Key Laboratory of Equipment Safety Service Technology in Supernormal Environment， Nanhua University， Hengyang 421001， China；2.School of 3D Printing， Xinxiang University， Xinxiang 453003， China)

LUO Hao(1987－)，Ph.D.，Associate Professor， Research Focus:Laser Additive Manufacturing of Metal Materials，E-mail:624879420＠qq.com

Received date: 2024-12-09

Revised date: 2025-01-08

Accepted date: 2025-01-10

Online published: 2025-06-10

Supported by

National Natural Science Foundation of China (52375341)； Key Scientific Research Project of Higher Education Institutions in Henan Province (25A430037)

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摘要

为了优化激光选区熔化技术制备生物医用Ti-15Mo 合金的工艺参数，利用光学显微镜、X 射线衍射仪、扫描电子显微镜、万能试验机、电化学工作站等设备系统研究了激光工艺参数对试样的相对密度、微观组织、力学性能以及耐腐蚀性能的影响。结果表明:随着激光能量密度的升高，Ti-15Mo 合金的相对密度呈先逐渐增大而后趋于平稳的趋势；试样沿垂直方向为等轴晶而沿平行于沉积方向为柱状晶，物相组成为bcc 结构的单一β 相；试样的力学性能与相对密度呈正相关。当激光功率为175 W、扫描速度为1 500 mm/s、扫描间距为80 μm 时，试样的相对密度达99.84%，综合性能最佳:极限抗拉强度、延伸率、弹性模量分别为801.0 MPa、24.0%、90.6 GPa；试样的腐蚀电流密度为0.059 μA/cm2，腐蚀速率为0.05 μm/a，满足生物医用植入物材料要求。

关键词： 激光选区熔化; Ti-15Mo 合金; 微观组织; 力学性能; 耐蚀性能

本文引用格式

朱红梅, 沈少凡, 王云飞, 潘存良, 罗浩 . 工艺参数对激光选区熔化制备生物医用Ti-15Mo合金组织及性能的影响[J]. 材料保护, 2025 , 58(5) : 72 -81 . DOI: 10.16577/j.issn.1001-1560.2025.0078

Abstract

To optimize the process parameters for fabricating biomedical Ti-15Mo alloy via selective laser melting (SLM)， this work systematically investigated the effects of laser processing parameters on the relative density， microstructure， mechanical properties， and corrosion resistance of specimens by optical microscopy (OM)， X-ray diffraction (XRD)， scanning electron microscopy (SEM)， universal testing machines and electrochemical workstations.Results showed that with increasing laser energy density， the relative density of Ti-15Mo alloy first progressively increased and then stabilized.The specimens exhibited equiaxed grains along the vertical direction and columnar grains parallel to the deposition direction， with a single β-phase of bcc structure constituting the phase composition.In addition， the mechanical properties of the specimens showed a positive correlation with their relative density.When the laser power was 175 W，the scanning speed was 1 500 mm/s，and the scanning spacing was 80 μm， the relative density of the as-prepared specimen reached 99.84%， and the comprehensive performance was the best.The specimens exhibited the ultimate tensile strength of 801.0 MPa， the elongation of 24.0%and the elastic modulus of 90.6 GPa.Moreover， the specimen demonstrated excellent corrosion resistance with a current density of 0.059 μA/cm2 and corrosion rate of 0.05 μm/a，meeting the stringent requirements for biomedical implant materials.

Key words： selective laser melting (SLM); Ti-15Mo alloys; microstructure; mechanical properties; corrosion resistance

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