Wear and Corrosion Resistance of WC-CoCr Coatings on TA15 by Laser Melting Deposition

LI Xuyong; HUANG Yong; WU Ning; LI Haonan

doi:10.15980/j.tzzz.T20250140

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Wear and Corrosion Resistance of WC-CoCr Coatings on TA15 by Laser Melting Deposition
Vol. 46, Issue 4, Pages: 612-618(2026)
Received：27 March 2025，

Revised：2025-06-11，

Accepted：23 June 2025，

Published：20 April 2026
DOI： 10.15980/j.tzzz.T20250140
稿件说明：

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李旭勇，黄勇，吴宁，等. TA15表面激光熔化沉积WC-CoCr涂层耐磨耐蚀性能研究［J］. 特种铸造及有色合金，2026，46（4）：612-618. DOI： 10.15980/j.tzzz.T20250140.

LI X Y，HUANG Y，WU N，et al. Wear and corrosion resistance of WC-CoCr coatings on TA15 by laser melting deposition［J］. Special Casting & Nonferrous Alloys，2026，46（4）：612-618. DOI： 10.15980/j.tzzz.T20250140.

摘要

采用激光熔化沉积（LMD）技术在TA15合金上制备了WC-CoCr涂层，利用X射线衍射仪、带能谱仪的扫描电镜、显微硬度计、摩擦磨损试验机和电化学工作站研究了激光功率对涂层微观结构、显微硬度、耐磨性和耐蚀性的影响。结果表明，涂层中颗粒状TiC和瓣状W均匀分布，随激光功率增加，涂层中金属相含量（质量分数，下同）降低，陶瓷相含量增加。1 200 W制备的涂层具有最佳的耐磨耐蚀性能，摩擦因数为0.32，比磨损率为1.95×10

-4

/（N⋅m），腐蚀电位为-0.33 V，腐蚀电流密度为9.89×10

-8

A/cm

，主要原因为涂层中陶瓷相含量最高，磨损过程中亚表层中陶瓷相和金属相的重新分布有效减轻粘着磨损，且耐腐蚀的富Ti相体积分数最高，有利于涂层在电化学腐蚀过程中形成TiO

钝化保护膜。

Abstract

WC-CoCr coatings were manufactured on TA15 by laser melting deposition （LMD） technology. The effects of laser power on the microstructure， microhardness， wear resistance and corrosion resistance of the coating were investigated by X-ray diffraction， scanning electron microscopy with energy spectrometer， microhardness tester， tribometer and electrochemical workstation. The results indicate that the coating is characterized by a uniform distribution of granular TiC and petal W. As laser power rises， the content of metal phase is decreased while the content of ceramic phase is increased. The

coating manufactuerd by 1 200 W exhibits desirable wear and corrosion resistance， where the friction coefficient is 0.32， specific wear rate is 1.95×10

-4

/（N⋅m）， corrosion potential is -0.33 V， and corrosion current density is 9.89×10

-8

A/cm

. During the wear process， the redistribution of ceramic and metallic phases in subsurface effectively diminishes the adhesive wear due to the highest content of ceramic phase， and the highest volume fraction of corrosion-resistant Ti-rich phase is beneficial for the coating to form a protective TiO₂ passivation film during electrochemical corrosion.

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references

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