锻压技术

医用钛合金的微观组织与阻尼性能

英文标题：Microstructure and damping performance for medical titanium alloy

作者：王微1 李振亚2 彭德林3 俞蓓1 尹春艳1

单位：1. 安徽机电职业技术学院 2. 中国航空无线电电子研究所 3. 哈尔滨工业大学

分类号：TG27

出版年,卷(期):页码：2022,47(1):203-208

摘要：

为降低医用钛合金的弹性模量、提高阻尼性能，采用水冷铜坩埚感应熔炼技术熔炼TZNM合金，并对样品进行固溶处理。借助扫描电子显微镜、透射电子显微镜、化学分析法、维氏硬度实验、阻尼实验，研究了固溶处理前后TZNM合金的显微组织与力学性能。结果表明：TZNM合金的整体熔炼效果良好，化学成分符合预期设计，为典型的双相α+β型钛合金，其铸态组织形貌为β基体上分布着板条状马氏体α，固溶处理后马氏体α′呈细针状；TZNM合金固溶处理后的维氏硬度为361 HV，比铸态时提高13.6%；随着应变振幅的增大，TZNM合金的内耗逐渐升高，固溶处理前后总体阻尼性能均有不同程度的提升。

In order to reduce the elastic modulus and improve the damping performance of medical titanium alloy, TZNM alloy was smelted by water-cooled copper crucible induction melting technology, and the sample was treated with solution treatment. Then, the microstructure and mechanical properties of TZNM alloy before and after solution treatment were studied by scanning electron microscope, transmission electron microscope, chemical analysis method, Vickers hardness test and damping test. The results show that TZNM alloy has a good overall melting effect, and its chemical composition meets the expected design. The phase structure is a typical two-phase α+β type titanium alloy, and the microstructure in as-cast is that strip martensite α is distributed on the β matrix, and the martensite α′after solution treatment is fine needle. In addition, the Vickers hardness of TZNM alloy after solution treatment is 361 HV, which is 13.6% higher than that in as-cast state. As the strain amplitude increases, the internal friction of TZNM alloy gradually increases, and the overall damping performance before and after solution treatment is improved to varying degrees.

基金项目：

2020年安徽省优秀青年人才支持计划重点项目（gxyqZD2020059）；安徽省高校省级自然科学重点研究项目（KJ2018A060）；安徽省质量工程项目（2019zyk39）；地方技能型高水平大学校级特色高水平专业项目（2019tgzy04）

作者简介：王微（1984-），女，硕士，副教授 E-mail：ahjdww@163.com

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