微弧氧化时间对TC4合金表面陶瓷膜层物相与性能的影响

doi:10.13251/j.issn.0254-6051.2025.11.049

摘要/Abstract

摘要： 在Na₂SiO₃电解液中,采用微弧氧化技术在TC4钛合金表面制备陶瓷膜层,利用扫描电镜(SEM)、X射线衍射仪(XRD)、显微硬度计及摩擦磨损试验机研究了微弧氧化时间对膜层表面形貌、物相及耐磨性的影响。结果表明,经微弧氧化处理后,TC4合金表面微弧氧化陶瓷膜层含金红石型TiO₂和SiO₂硬质相,合金耐磨性得到改善。随微弧氧化时间增加,膜层中的孔洞先增大后减小,孔洞数量逐渐减少,硬度亦呈先升高再降低的趋势。微弧氧化3 min时,合金硬度达到最大值455 HV0.5,平均摩擦因数约为0.12,耐磨性最优。

关键词: TC4钛合金, 微弧氧化, 陶瓷膜, 物相, 硬度, 耐磨性

Abstract: Effect of micro-arc oxidation time on the surface morphology, phase composition and wear resistance of a ceramic film on the surface of TC4 titanium alloy prepared by micro-arc oxidation technology in Na₂SiO₃ electrolyte was systematically investigated by using scanning electron microscope (SEM), X-ray diffractometer (XRD), microhardness tester and friction and wear tester. The results show that after micro-arc oxidation treatment, the micro-arc oxidation ceramic film on the surface of TC4 alloy contains rutile-type TiO₂ and SiO₂ hard phases, and the wear resistance of the alloy is improved. With the increase of micro-arc oxidation time, the pores in the film first increase and then decrease, the number of pores gradually decreases, and the hardness also shows a trend of first increasing and then decreasing. When the micro-arc oxidation time is 3 min, the hardness of the alloy reaches the maximum value of 455 HV0.5, the average friction coefficient is approximately 0.12, and the wear resistance is optimal.

Key words: TC4 alloy, micro-arc oxidation, ceramic film, phase, hardness, wear resistance

中图分类号:

TG174.4

范兴平, 范维. 微弧氧化时间对TC4合金表面陶瓷膜层物相与性能的影响[J]. 金属热处理, 2025, 50(11): 328-332.

Fan Xingping, Fan Wei. Effect of micro-arc oxidation time on phase and properties of ceramic film on TC4 titanium alloy[J]. Heat Treatment of Metals, 2025, 50(11): 328-332.

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