Microstructures and properties of nano-modified multimodal Cr3C2-NiCr coatings made through laser cladding

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science Pub Date : 2024-10-06 DOI:10.1007/s10853-024-10294-3

Irfan, Ming Hu, Lingyu Meng, Hanqing Zhao, Amin Wang

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Abstract

Both the nano-modified multimodal and conventional Cr₃C₂-NiCr coatings were fabricated by laser cladding (LC) on a CuCrZr alloy substrate with a stainless steel transition layer. The study investigated the microstructural evolution of the coatings during the LC process. The effect of the stainless steel transition layer between the substrate and coatings on microstructure, microhardness, and wear resistance was discussed. Many aggregates formed by the aggregation of micron or large-size submicron particles contain many cavities, which are filled by small-size or nano-ceramic particles during the laser cladding process to improve the density of the coatings and properties. Different from other LC coatings, only micro-melting occurred in the bonding zone between the coatings and transition layer, but no apparent melting phenomenon appeared, which may be due to the high content of Cr₃C₂ ceramic phase and low content of NiCr adhesive phase in the coatings. The Cr₃C₂-NiCr coatings, transition layer, and copper (Cu) substrate are seamlessly integrated and compatible, ensuring effective interface formation without any discernible cracks. The nanostructure multimodal Cr₃C₂-NiCr coating showed significantly higher average microhardness values of 1357 HV_0.3 than conventional Cr₃C₂-NiCr, 1184 HV_0.3. Furthermore, careful parameter selection led to outstanding wear-resistant nano-modified multimodal Cr₃C₂-NiCr, paving the way for future industrial applications.

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通过激光熔覆制造的纳米改性多模态 Cr3C2-NiCr 涂层的微观结构和性能

在带有不锈钢过渡层的 CuCrZr 合金基体上，通过激光熔覆（LC）制造了纳米改性多模态和传统 Cr3C2-NiCr 涂层。研究调查了 LC 过程中涂层的微观结构演变。讨论了基体和涂层之间的不锈钢过渡层对显微结构、显微硬度和耐磨性的影响。许多由微米或大尺寸亚微米颗粒聚集形成的聚集体含有许多空腔，在激光熔覆过程中，这些空腔由小尺寸或纳米陶瓷颗粒填充，以提高涂层的密度和性能。与其他 LC 涂层不同的是，涂层与过渡层之间的结合区只发生了微熔化，没有出现明显的熔化现象，这可能是由于涂层中 Cr3C2 陶瓷相含量较高，而 NiCr 粘合相含量较低的缘故。Cr3C2-NiCr 涂层、过渡层和铜（Cu）基底无缝结合，相互兼容，确保了有效的界面形成，没有任何明显的裂缝。纳米结构多模态 Cr3C2-NiCr 涂层的平均显微硬度值为 1357 HV0.3，明显高于传统 Cr3C2-NiCr 的 1184 HV0.3。此外，通过精心选择参数，纳米改性的多模态 Cr3C2-NiCr 具有出色的耐磨性，为未来的工业应用铺平了道路。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.