东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (6): 816-822.DOI: 10.12068/j.issn.1005-3026.2024.06.008

• 材料与冶金 • 上一篇    

烧结工艺对多孔钛微观结构及力学性能的影响

赵家豪1, 曲扬1, 罗洪杰1,2(), 杨世杰1   

  1. 1.东北大学 冶金学院,辽宁 沈阳 110819
    2.东北大学 教育部材料先进制备技术工程研究中心,辽宁 沈阳 110819
  • 收稿日期:2023-02-24 出版日期:2024-06-15 发布日期:2024-09-18
  • 通讯作者: 罗洪杰
  • 作者简介:赵家豪(1998-),男,河北保定人,东北大学硕士研究生
    罗洪杰(1965-),男,辽宁本溪人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51874093)

Effect of Sintering Process on Microstructure and Mechanical Property of Porous Ti

Jia-hao ZHAO1, Yang QU1, Hong-jie LUO1,2(), Shi-jie YANG1   

  1. 1.School of Metallurgy,Northeastern University,Shenyang 110819,China
    2.Engineering Technology Research Center of Ministry of Education for Materials Advanced Preparation,Northeastern University,Shenyang 110819,China.
  • Received:2023-02-24 Online:2024-06-15 Published:2024-09-18
  • Contact: Hong-jie LUO
  • About author:LUO Hong-jie, E-mail: luohjedu@sina.com

摘要:

烧结作为多孔钛成型过程中的关键步骤之一,通过控制烧结条件能够赋予多孔钛优异的力学性能.以镁粉和镁颗粒作为造孔剂,采用真空蒸馏烧结在不同烧结条件下制备了造孔剂添加量为60%的液固过滤用多孔钛,并对其微观结构、压缩性能和抗弯性能进行了表征和测试.研究表明:随烧结温度的升高和烧结时间的延长,多孔钛的孔径减小、孔隙率下降、孔隙球化;当烧结温度低于1 150 ℃时,多孔钛的轴向收缩始终大于径向收缩;屈服强度和弯曲强度在烧结温度为1 150 ℃、烧结时间为180 min时达到最大,分别为158.60和230.40 MPa.

关键词: 多孔钛, 真空蒸馏, 孔隙率, 屈服强度, 弯曲强度

Abstract:

Sintering is a critical step in the formation process of porous Ti. Porous Ti can be endowed with excellent mechanical properties by controlling sintering conditions. Porous Ti for liquid?solid filtration with a 60% space holder was manufactured using vacuum distillation sintering, which uses Mg powder and Mg particles as the space holder under different sintering conditions. The microstructure, compressive property and bending property were characterized and tested, providing a reference for the preparation and performance optimization of porous Ti. The results show that with increasing of sintering temperature and time, the pore size of porous Ti decreases, the porosity decreases, and the pore spheroidizes. When the sintering temperature is below 1 150 ℃, the axial shrinkage of porous Ti is always greater than the radial shrinkage. The yield strength and bending strength reach the maximum values of 158.60 MPa and 230.40 MPa respectively at a sintering temperature of 1 150 ℃ and a sintering time of 180 min.

Key words: porous Ti, vacuum distillation, porosity, yield strength, bending strength

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