超音速火焰喷涂微纳WC-Cr3C2-CoNi涂层的结构与性能

祝子伟, 陈清宇, 杨超, 纪岗昌

doi:10.16577/j.issn.1001-1560.2023.0079

材料保护 >

2023 , Vol. 56 >Issue 4: 22 - 28

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0079

试验研究

超音速火焰喷涂微纳WC-Cr₃C₂-CoNi涂层的结构与性能

展开

¹九江学院江西省材料表面再制造工程技术研究中心； ²九江学院材料科学与工程学院

纪岗昌(1961-)，博士，主要研究方向为热喷涂，材料表面强化及涂层技术，电话:13479258228，E-mail:Jigangchang＠126.com

收稿日期: 2022-10-28

修回日期: 2022-11-20

录用日期: 2022-12-21

网络出版日期: 2023-08-03

基金资助

国家自然科学基金项目(51861012)；九江科技项目([2012]84、[2005]54、[2005]44)资助

收起

Microstructure and Properties of High Velocity Oxy-Fuel Sprayed Micro-Nano WC-Cr3C2-CoNi Coating

Expand

(a.Jiangxi Province Engineering Research Center of Materials Surface Enhancing ＆ Remanufacturing，b.School of Mechanical and Materials Engineering，Jiujiang University，Jiujiang 332005，China)

Received date: 2022-10-28

Revised date: 2022-11-20

Accepted date: 2022-12-21

Online published: 2023-08-03

Fold

摘要

为了研究双相碳化物金属陶瓷沉积行为对涂层结构性能的影响,分析了原始粉末、低碳钢基体上扁平粒子的表面形貌与截面结构,研究了超音速火焰喷涂微纳WC-Cr3C2-CoNi粒子的沉积涂层的组织结构、相结构和力学性能。研究结果表明:基体上沉积粒子呈现表面光滑浮凸的饼状,且粒子周边出现了径向溅射条纹,扁平粒子厚度远小于其径向尺寸。涂层截面显微组织结构呈现一定的层状特征,硬质相与粘结相、扁平粒子与扁平粒子、扁平粒子与基体及不同硬质相之间的界面结合良好。涂层相结构主要为WC、少量脱碳相、非晶相。Cr2O5涂层的显微硬度、弹性模量、断裂韧性、结合强度和磨损失重量分别为(13.19±0.52)GPa,(145.17±3.89)GPa,(2.59±0.64)MPa・m1/2,(38.41±0.51)MPa和(6.08±0.68)mg。相比WC-Co12涂层,超音速火焰喷涂WC-Cr3C2-CoNi涂层WC分解及其失碳相显著降低,力学性能明显提高。

关键词： 超音速火焰喷涂; 微纳双碳化物; WC-Cr3C2-CoNi 粒子; 沉积行为; 涂层结构; 性能

本文引用格式

祝子伟, 陈清宇, 杨超, 纪岗昌 . 超音速火焰喷涂微纳WC-Cr₃C₂-CoNi涂层的结构与性能[J]. 材料保护, 2023 , 56(4) : 22 -28 . DOI: 10.16577/j.issn.1001-1560.2023.0079

Abstract

For studying the deposition behaviour of dual-carbides cermet particles on coating microstructure and properties，the surface morphology and cross-sectional microstructure of the original powder and the flat particle on the low-carbide steel substrate were analyzed，and the microstructure，phase constitution and properties of HVOF sprayed micro-nano WC-Cr3C2-CoNi coating were investigated systemically.Results showed that the particles deposited on the substrate showed a caky shape with smooth and convex surface，radial sputtering streaks appeared around the particles，and the thickness of flat particles was much smaller than their radial dimensions.In addition，the section microstructure of the coating presented certain lamellar characteristics，and the interfaces between flat particles，hard phase and bond phase，flat particle and substrate and different hard phases bonded well.The coating had the main phase of WC，some decarburized phases，and the amorphous phase of Cr2O5.Moreover，the microhardness，elastic modulus，fracture toughness，adhesive strength and wear weight loss of the coating were (13.19±0.52) GPa，(145.17±3.89) GPa，(2.59±0.64) MPa·m1/2，(38.41±0.51) MPa and (6.08±0.68) mg respectively.Compared to WC-Co12 coating，the decomposition of WC and the decarburized phases decreased significantly in the HVOF sprayed micro-nano WC-Cr3C2-CoNi coating and the coating’s mechanical properties were obviously improved.

Key words： high velocity oxy-fuel spraying; micro-nano dual-carbides; WC-Cr3C2-CoNi particle; deposition behavior; coating microstructure; properties

Options

文章导航

模态框（Modal）标题

摘要

本文引用格式

Abstract