激光重熔和超声波表面滚压法激光熔覆 Stellite 6 合金的显微组织和摩擦学特性

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-11-13 DOI:10.1016/j.surfcoat.2024.131560

Jiayu Sun , Yingying Zhang , Zhengyu Sun , Tianbiao Yu , Guofa Wang

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引用次数: 0

摘要

采用激光熔覆（LC）技术将 Stellite 6 合金沉积到 27SiMn 钢的表面，然后进行激光重熔（LR）和超声波表面轧制（USR）。使用电子反向散射衍射（EBSD）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、X 射线应力分析仪、维氏硬度计和材料表面性能测试仪研究了 LC、LR 和 LR-USR 样品的表面粗糙度、微观结构、显微硬度、表面残余应力和耐磨性。结果表明，与 LC 相比，LR-USR 显著细化了包覆层的表面树枝状晶粒，树枝状晶粒的平均尺寸从 16.37 μm 减小到 6.92 μm。在 USR 之后，样品从拉伸残余应力（TRS）转换为压缩残余应力（CRS），并在靠近覆层表面的晶粒中产生了高密度位错和应变。LR-USR 样品的磨损深度体积最小，显示出典型的磨料磨损。

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Microstructure and tribological property of laser cladding Stellite 6 alloy by laser remelting and ultrasonic surface rolling

Stellite 6 alloy was deposited onto the surface of 27SiMn steel using the laser cladding (LC) technique, which was then followed by laser remelting (LR) and ultrasonic surface rolling (USR).The surface roughness, microstructure, microhardness, surface residual stress, and wear resistance of LC, LR, and LR-USR samples were studied using electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray stress analyzer, Vickers hardness tester, and material surface performance tester. The results showed that compared with LC, LR-USR significantly refined the surface dendrites of the cladding layer, with the average dendrite size decreasing from 16.37 μm to 6.92 μm. After USR, the samples converted from tensile residual stress (TRS) to compressive residual stress (CRS), and the high-density dislocations and strain generated in the grains near the surface of the cladding layer. The wear depth volume of the LR-USR samples was the smallest, showing typical abrasive wear.

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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.