热处理对激光熔覆TiC强化Inconel718复合涂层组织结构和性能的影响

李凌霄, 卢盛儒, 仝永刚, 胡永乐, 杨玲伟, 伍鹏飞, 方靖中

doi:10.16577/j.issn.1001-1560.2025.0076

材料保护 >

2025 , Vol. 58 >Issue 5: 50 - 62

DOI: https://doi.org/10.16577/j.issn.1001-1560.2025.0076

激光表面改性技术专栏

热处理对激光熔覆TiC强化Inconel718复合涂层组织结构和性能的影响

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1.长沙理工大学汽车与机械工程学院 2.中国空气动力研究与发展中心

仝永刚(1985－)，博士，副教授，研究方向为增材制造，E-mail:tongyonggang＿csust＠163.com

收稿日期: 2024-12-02

修回日期: 2024-12-30

录用日期: 2024-12-31

网络出版日期: 2025-06-10

基金资助

湖南省教育厅科学研究项目(23A0264)；湖南省自然科学基金(2023JJ30038)

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Influence of Heat Treatment on the Microstructure and Properties of Laser Cladded TiC-Reinforced Inconel718 Composite Coatings

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(1.College of Automotive and Mechanical Engineering， Changsha University of Science ＆ Technology， Changsha 410114， China；2.China Aerodynamics Research and Development Center， Mianyang 624000， China)

TONG Yonggang (1985－)， Ph.D.， Associate Professor， Research Focus: Additive Manufacturing， E-mail:tongyonggang＿csust＠163.com

Received date: 2024-12-02

Revised date: 2024-12-30

Accepted date: 2024-12-31

Online published: 2025-06-10

Supported by

Scientific Research Project of Hunan Provincial Education Department (23A0264)； Hunan Provincial Natural Science Foundation (2023JJ30038)

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摘要

为了提高激光熔覆TiC 强化Inconel718 复合涂层的硬度与耐磨性，对TiC/Inconel718 复合涂层进行了固溶和时效处理，并研究了热处理与TiC 含量对TiC/Inconel718 复合涂层显微组织、硬度和摩擦磨损性能的影响。研究发现，在热处理后TiC/Inconel718 复合涂层的微观结构发生了显著变化:大部分Laves 相溶解，同时析出了(Nb，Ti)C 碳化物，沉淀相析出更加均匀。此外，热处理还促使了强化相的析出以及细小尺寸TiC 的形成。碳化物的形成、热处理后强化相的析出以及细小尺寸TiC 的析出显著增强了复合涂层硬度与摩擦磨损性能。在热处理后，TiC 含量为30%(质量分数)的复合涂层硬度最高，达到764 HV0.2。在高温环境下，热处理后的复合涂层具有更优异的耐磨性能，随着TiC 含量的增加复合涂层的磨损机制由黏着磨损、磨粒磨损变为轻微磨粒磨损。涂层的硬度和高温耐磨性能的提升归因于热处理后强化相的析出与不同尺度TiC 的增强作用。

关键词： TiC 陶瓷粉末; 热处理; 激光熔覆; TiC/Inconel718 复合涂层; 磨损机制

本文引用格式

李凌霄, 卢盛儒, 仝永刚, 胡永乐, 杨玲伟, 伍鹏飞, 方靖中 . 热处理对激光熔覆TiC强化Inconel718复合涂层组织结构和性能的影响[J]. 材料保护, 2025 , 58(5) : 50 -62 . DOI: 10.16577/j.issn.1001-1560.2025.0076

Abstract

To enhance the hardness and wear resistance of laser-cladded TiC-reinforced Inconel718 composite coatings， solution and aging treatments were applied to the TiC/Inconel718 composite coatings.The effects of heat treatment and different TiC contents on the microstructure， hardness and friction and wear properties of the TiC/Inconel718 composite coatings were investigated.Results showed that the microstructure of the TiC/Inconel718 composite coating underwent significant changed after heat treatment.Most of the Laves phase dissolved， and at the same time， (Nb， Ti)C carbides precipitated， making the precipitation phase more uniform.In addition， heat treatment also promoted the precipitation of the strengthening phase and the formation of fine-sized TiC.The formation of carbides，the precipitation of strengthening phases after heat treatment and the precipitation of fine-sized TiC significantly enhanced the hardness and friction and wear performance of the composite coating.After heat treatment， the composite coating with a TiC content of 30%(mass fraction) had the highest hardness， reaching 764 HV0.2.Under high-temperature conditions， the wear resistance of heat-treated composite coatings was enhanced.With increasing TiC content， the wear mechanism transitioned from adhesive wear and abrasive wear to mild abrasive wear.Besides， the improvement in coating hardness and high-temperature wear resistance was attributed to the precipitation of strengthening phases after heat treatment and the reinforcing effect of TiC particles at different scales.

Key words： TiC ceramic powder; heat treatment; laser cladding; TiC/Inconel718 composite coating; wear mechanism

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