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基于激光选区熔化工艺制备的 TC4 制件应用研究
Application Performance Research of TC4 by Selective Laser Melting
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- DOI:
- 作者:
- 何 坤，郝 巨，陈素明，赵庆辉
HE Kun, HAO Ju, CHEN Suming, ZHAO Qinghui
- 作者单位:
- 中航西安飞机工业集团股份有限公司，陕西 西安 710089
Avic Xi'an Aircraft Industry Group Company Ltd., Xi'an 710089, China
- 关键词:
- SLM；TC4；疲劳；应用性能
selected laser melting; TC4; fatigue; application performance
- 摘要:
- 本文使用激光选区熔化(SLM)工艺制备 TC4 钛合金标准试样以及典型零件。 通过进行不同热处理工艺实
验，研究了材料金相组织及常规力学性能，并获得最优热处理工艺。 确定了 800 ℃为最优退火温度，兼顾材料组织均匀
性与力学性能，并通过测试高周疲劳 S-N 曲线，对制件进行力学性能的全面评价。 TC4 在 107 次高周疲劳循环应力的环
境中疲劳极限 σR 为 350 MPa，表现出稳定的疲劳强度。最终通过典型零件地面功能试验考核，获得 SLM 成形 TC4 零件
关键应用性能参数，为 TC4 金属 3D 打印零件的应用提供依据。
In this paper, a selected laser melting (SLM) process was used to prepare TC4 titanium alloy standard samples and typical parts. Through different heat treatment process tests, the metallographic structure and conventional mechanical properties of the material were analyzed, and the optimal heat treatment process was finally obtained. 800 ℃ is determined to be the optimal annealing temperature, taking into account the microstructure uniformity of the material and the mechanical properties. In addition, the high-cycle fatigue S-N curve was tested to conduct a comprehensive performance evaluation of the mechanical properties of the parts. The fatigue limit σR of TC4 in the environment of 107 high-cycle fatigue cycles is 350 MPa, showing stable fatigue strength. Finally, through the ground function test assessment of typical parts, the key application performance parameters of SLM-formed TC4 parts are obtained, which provides a basis for the application of TC4 metal 3D printed parts.