15CrMo钢激光熔覆Inconel 625 + xAl复合涂层的研制与评价

IF 5.3 2区 材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS
Gen Zhang , Guolong Wu , Siyuan Tao , Yongfu Zhao , Xianglong Guo , Ye Wang , Yanping Huang , Zongpei Wu , Zhongyu Piao , Jianhua Yao
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引用次数: 0

摘要

为了提高15CrMo钢在高温超临界二氧化碳(S-CO2)环境中的耐腐蚀性,研究了激光熔覆Inconel 625/铝复合涂层的研制。通过优化激光工艺参数和调整Al含量(0.5 ~ 4 wt%),系统地研究了合金的显微组织演变、力学性能和腐蚀行为。结果表明:i) Al含量的增加促进了Laves相(Fe2(Nb,Mo))的析出;ii)观察到机械性能的增强,随着Al含量的增加,显微硬度逐渐增强,耐磨性在Al含量为4 wt%时达到峰值;iii)在650°C S-CO2中暴露1000小时后,所有涂层样品都保持其金属光泽,并形成保护性的Cr2O3/NiCr2O4氧化层(厚度约为156 nm, Al含量为4 wt%),其中氧化物/涂层界面处的亚稳六方Al2O3和无定形SiO2协同抑制氧扩散。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development and evaluation of laser cladding Inconel 625 + xAl composite coatings on 15CrMo steels for enhanced corrosion resistance in S-CO2 environments
This study investigated the development of laser cladding Inconel 625/aluminium composite coatings on 15CrMo steels for enhanced corrosion resistance in high-temperature supercritical carbon dioxide (S-CO2) environments. By optimizing laser process parameters and tailoring Al content (0.5–4 wt%), the microstructural evolution, mechanical properties and corrosion behavior were systematically investigated. The obtained results showed that: i) Increasing Al content promoted Laves phase (Fe2(Nb,Mo)) precipitation; ii) Enhanced mechanical performance was observed, with a progressive enhancement in microhardness with rising Al content and wear resistance peaking at 4 wt% Al; iii) After 1000 h exposure to 650 °C S-CO2, all coating samples maintained their metallic luster and developed a protective Cr2O3/NiCr2O4 oxide layer (~156 nm thick at 4 wt% Al), where metastable hexagonal Al2O3 and amorphous SiO2 at the oxide/coating interface synergistically suppress oxygen diffusion.
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来源期刊
Surface & Coatings Technology
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.
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