金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 278-285.DOI: 10.13251/j.issn.0254-6051.2026.02.041

• 工艺研究 • 上一篇    下一篇

预变形对TiB2/7055复合材料摩擦磨损性及耐蚀性的影响

王明, 吉新宇, 杨磊峰, 陈羿帆, 周东帅, 百志好, 王健   

  1. 江苏理工学院 材料工程学院, 江苏 常州 213001
  • 收稿日期:2025-09-20 修回日期:2026-01-03 发布日期:2026-03-05
  • 通讯作者: 周东帅,副教授,博士,E-mail:zhouds@jsut.edu.cn
  • 作者简介:王 明(1998—),男,硕士研究生,主要研究方向为铝合金材料,E-mail:19855309114@163.com。
  • 基金资助:
    江苏省高等学校基础科学(自然科学)研究项目(23KJB430018)

Effect of pre-deformation on corrosion resistance and wear properties of TiB2/7055 composites

Wang Ming, Ji Xinyu, Yang Leifeng, Chen Yifan, Zhou Dongshuai, Bai Zhihao, Wang Jian   

  1. Department of Materials Engineering, Jiangsu University of Technology, Changzhou Jiangsu 213001, China
  • Received:2025-09-20 Revised:2026-01-03 Published:2026-03-05

摘要: 通过对TiB2/7055复合材料施加0%~6.0%的室温预变形,利用电化学测试、摩擦磨损试验及SEM/TEM表征,系统研究了不同预变形量对固溶-预变形-时效处理后TiB2/7055复合材料耐蚀性以及摩擦磨损行为的影响。结果表明,随着预变形量的增加,时效态TiB2/7055复合材料中的析出相由粗大团簇状逐渐细化并弥散分布,在预变形量为3.0%时实现较好的弥散分布,进一步增大预变形量会使缺陷聚集,导致析出相尺寸增大,分布均匀性逐渐下降。当预变形量小于3.0%时,复合材料的摩擦曲线波动范围、最大磨痕深度以及宽度均随预变形量的增加逐渐增大,磨损机制逐渐向黏着磨损转变,耐磨性逐渐变差。预变形量超过3.0%时,复合材料的磨损曲线波动范围、最大磨痕深度以及宽度均随预变形量的增加逐渐减小,磨损机制变为黏着磨损和磨粒磨损的混合模式,耐磨性逐渐增强。在预变形量为3.0%时,复合材料对应的阻抗弧半径更大、自腐蚀电位更正且自腐蚀电流较低,晶界处无沉淀析出带(PFZ)宽度为19 nm,且晶界析出物分布离散,具有更好的耐蚀性。

关键词: TiB2/7055复合材料, 预变形, 耐磨性, 磨损机制, 耐蚀性

Abstract: Effect of room-temperature pre-deformation, ranging from 0% to 6.0%, on the corrosion resistance and wear behavior of TiB2/7055 composites was systematically investigated after solution-pre-deformation-aging treatment through electrochemical tests, friction-wear experiments, and SEM/TEM characterization. The results indicate that with the increase of pre-deformation, the precipitates in the composites evolve from coarse clusters to a refined and more dispersed morphology. An optimal uniform distribution is achieved at pre-deformation of 3.0%, beyond this level, further increasing deformation promotes defect accumulation, leading to precipitate coarsening and a gradual deterioration in distribution homogeneity. When the pre-deformation is less than 3.0%, the fluctuation range of the friction curve, maximum wear scar depth, and width of the composite gradually increase with the increase of pre-deformation. The wear mechanism progressively shifts toward adhesive wear, resulting in gradually deteriorating wear resistance. When the pre-deformation exceeds 3.0%, the fluctuation range of the wear curve, maximum wear scar depth, and width of the composite gradually decrease with further increase of pre-deformation. The wear mechanism transitions to a mixed mode of adhesive wear and abrasive wear, leading to gradually enhanced wear resistance. At a pre-deformation of 3.0%, the composite exhibits a larger impedance arc radius, a more positive self-corrosion potential, and a lower self-corrosion current. The width of the precipitate-free zone (PFZ) at the grain boundaries is measured to be 19 nm, and the grain boundary precipitates are discretely distributed, contributing to improved corrosion resistance.

Key words: TiB2/7055 composites, pre-deformation, wear resistance, wear mechanism, corrosion resistance

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