真空退火处理对选区激光熔化TA2纯钛显微组织及力学性能的影响

doi:10.13251/j.issn.0254-6051.2022.05.025

金属热处理 ›› 2022, Vol. 47 ›› Issue (5): 155-160.DOI: 10.13251/j.issn.0254-6051.2022.05.025

真空退火处理对选区激光熔化TA2纯钛显微组织及力学性能的影响

张春雨¹, 颜瑜², 陈贤帅², 杜如虚²

1.佛山市逸合生物科技有限公司, 广东佛山 528200;
2.广东健齿生物科技有限公司, 广东广州 511458

收稿日期:2021-09-25 修回日期:2022-01-25 出版日期:2022-05-25 发布日期:2022-06-16
作者简介:张春雨(1985—),男,硕士,主要研究方向为金属3D打印激光成形,E-mail: cy.zhang@gzjanus.com
基金资助:
佛山市科技创新项目(2018IT100212)

Effect of vacuum annealing on microstructure and mechanical properties of selective laser melted TA2 pure titanium

Zhang Chunyu¹, Yan Yu², Chen Xianshuai², Du Ruxu²

1. Foshan Yihe Biotechnology Co., Ltd., Foshan Guangdong 528200, China;
2. Guangdong Janus Biotechnology Co., Ltd., Guangzhou Guangdong 511458, China

Received:2021-09-25 Revised:2022-01-25 Online:2022-05-25 Published:2022-06-16

摘要/Abstract

摘要： 采用选区激光熔化工艺制备了医用TA2纯钛试样,利用光学显微镜、扫描电镜、万能材料试验机和维氏硬度计等分析手段对比分析了真空退火处理对试样显微组织和力学性能的影响,还利用氮氢氧联合测定仪研究了试样中含氧量的变化。结果表明,合适的真空热处理工艺能明显改变纯钛零件显微组织,从马氏体组织向近等轴组织转变;能有效改变制备零件的力学性能,使拉伸强度及屈服强度降低,塑性升高;除此之外,真空热处理还能降低制备零件的含氧量和硬度。经800 ℃真空退火保温1 h后,试样的显微组织为近等轴组织,其各项力学性能均满足GB/T 13810—2017《外科植入物用钛及钛合金加工材》要求,其抗拉强度为670.3 MPa,屈服强度为609 MPa,断后伸长率为20.3% ,断面收缩率为44.7% 。

关键词: 选区激光熔化, TA2纯钛, 真空热处理, 显微组织, 力学性能

Abstract: The medical TA2 pure titanium specimens were prepared by the selective laser melting process. Effect of vacuum annealing on microstructure and mechanical properties of the specimens was been compared and analyzed by means of optical microscope (OM), scanning electron microscope (SEM), universal material experiment machine and Vickers hardness tester. The change of oxygen content in the specimens were also studied by means of combined determination apparatus for oxygen, nitrogen and hydrogen. The results show that appropriate vacuum heat treatment process can obviously change the microstructure of specimens from martensite structure to near-equiaxial structure, and effectively change the mechanical properties of the specimens, reduce the tensile strength and yield strength, and increase the plasticity. In addition, vacuum heat treatment could reduce the oxygen content and hardness. When annealed in vacuum at 800 ℃ for 1 h, the microstructure of specimens is the near-equiaxial structure,and the mechanical properties are satisfied with the requirement of the GB/T 13810—2017 Wrought titanium and titanium alloy for surgical implants,and the R_m, R_p0.2, A and Z are 670.3 MPa, 609 MPa, 20% and 44.7%, respectively.

Key words: selective laser melting, TA2 pure titanium, vacuum heat treatment, microstructure, mechanical properties

中图分类号:

TG166.5

张春雨, 颜瑜, 陈贤帅, 杜如虚. 真空退火处理对选区激光熔化TA2纯钛显微组织及力学性能的影响[J]. 金属热处理, 2022, 47(5): 155-160.

Zhang Chunyu, Yan Yu, Chen Xianshuai, Du Ruxu. Effect of vacuum annealing on microstructure and mechanical properties of selective laser melted TA2 pure titanium[J]. Heat Treatment of Metals, 2022, 47(5): 155-160.

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真空退火处理对选区激光熔化TA2纯钛显微组织及力学性能的影响

Effect of vacuum annealing on microstructure and mechanical properties of selective laser melted TA2 pure titanium

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