Fe-Cr-B合金涂层的组织演变与腐蚀行为：超高速激光熔覆与传统激光熔覆的比较研究

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-08-04 DOI:10.1016/j.surfcoat.2025.132542

Pengfei Sun , Jie Liang , Dongfang Ma , Congwen Tang , Dengzhi Wang , Tao Lai , Heng Zhang

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引用次数: 0

摘要

本研究比较了超高速激光熔覆和传统激光熔覆制备的Fe-Cr-B涂层的显微组织和耐蚀性。显微组织表征表明，提高扫描速度可以显著改善显微组织，减轻元素偏析，增强显微组织均匀性。电化学结果表明，与传统的激光熔覆涂层相比，激光扫描速度快的涂层具有更高的耐腐蚀性和更稳定的钝化行为。这些增强是由于稀释率降低、元素均匀分散和精细微结构特征的协同作用，它们共同促进了具有优异稳定性的致密钝化膜的形成。然而，过大的扫描速度（40 m/min）会降低耐蚀性，因为界面增加了，产生了腐蚀起始的优先位置。本研究为优化极高速激光熔覆参数以制备高性能Fe-Cr-B涂层建立了基本指导方针。

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Microstructural evolution and corrosion behavior of Fe-Cr-B alloy coatings: A comparative study between extreme high-speed and traditional laser cladding

This study compares the microstructure and corrosion resistance of Fe-Cr-B coatings prepared via extreme high-speed and traditional laser cladding. Microstructural characterization revealed that increased scanning speeds significantly refine the microstructure, mitigate elemental segregation, and enhance microstructural homogeneity. Electrochemical results demonstrated that coatings with high laser scanning speed exhibit higher corrosion resistance and more stable passivation behavior compared to traditional laser cladding coatings. These enhancements are attributed to the synergistic effects of reduced dilution rates, uniform elemental dispersion, and refined microstructural features, which collectively promote the formation of dense passive films with exceptional stability. However, excessive scanning speeds (40 m/min) were found to compromise corrosion resistance due to increased interphase interfaces, creating preferential sites for corrosion initiation. This study establishes fundamental guidelines for optimizing extreme high speed laser cladding parameters to fabricate high-performance Fe-Cr-B coatings.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.