具有优异高温耐磨性和自润滑性能的新型镍基合金堆焊层的微观结构和摩擦学性能

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

Surface & Coatings Technology Pub Date : 2024-09-25 DOI:10.1016/j.surfcoat.2024.131395

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引用次数: 0

摘要

本文旨在研究在满足复杂冶金服役条件的零件表面激光熔覆具有优异高温耐磨性和自润滑性能的镍基合金涂层。通过在 NiCrCoMoBSi 合金粉末中添加 3 wt%-11 wt% 的 WS2 和 Ti 粉末形成复合合金粉末，并通过激光熔覆在 Cr28Ni48W5 基体表面形成具有高温耐磨性和自润滑性能的新型 Ni 基合金样品。结果表明，WS2和Ti粉末的加入对样品的微观结构演变、高温耐磨性和自润滑性能有显著影响。添加了 7 wt% WS2 和 Ti 的激光熔覆涂层具有 3% 的 TiS 自润滑相和 19% 的增强相，微观结构匹配关系最佳，从而提高了样品的高温耐磨性和自润滑性能。在 800 ℃ 时，与 Cr28Ni48W5 超合金基体相比，激光熔覆涂层的摩擦系数为 0.22，磨损比为 1.70 × 10-5 mm3 N-1 m-1，分别降低了 60 % 和 54.67 %。此外，还阐述了耐磨性和自润滑性能增强的机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Microstructure and tribological performance of novel Ni-based alloy cladding with excellent high temperature wear resistance and self-lubrication performance

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Microstructure and tribological performance of novel Ni-based alloy cladding with excellent high temperature wear resistance and self-lubrication performance

This paper aims to study the laser cladding of Ni-based alloy coatings with excellent high temperature wear resistance and self-lubrication performance on the surface of parts such that meet complex metallurgical service conditions. The composite alloy powders were formed by adding 3 wt%–11 wt% WS₂ and Ti powder to NiCrCoMoBSi alloy powder, and the novel Ni-based alloy samples with high temperature wear resistance and self-lubrication performance were cladded on the surface of Cr28Ni48W5 substrate by laser cladding. The results show that the addition of WS₂ and Ti powder had a significant influence on the microstructure evolution and high temperature wear resistance and self-lubrication performance of the samples. The laser cladding coating with 7 wt% WS₂ and Ti had the 3 % TiS self-lubricating phase and 19 % enhanced phase with the best microstructure matching relationship, which improved the high temperature wear resistance and self-lubrication performance of the sample. At 800 °C, compared with the Cr28Ni48W5 superalloy substrate, the friction coefficient of the laser cladding coating was 0.22 and the wear ratio was 1.70 × 10⁻⁵ mm³ N⁻¹ m⁻¹, which were reduced by 60 % and 54.67 % respectively. The mechanism of the enhanced wear resistance and self-lubrication performance was elaborated.

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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.