Cr3C2 - NiCr涂层的制备及其抗高温冲蚀磨损性能

罗靖川, 杨冠军, 陈林

doi:10.16577/j.issn.1001-1560.2022.0177

材料保护 >

2022 , Vol. 55 >Issue 7: 1 - 7

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0177

高温腐蚀防护专栏

Cr₃C₂ - NiCr涂层的制备及其抗高温冲蚀磨损性能

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西安交通大学材料科学与工程学院金属材料强度国家重点实验室，陕西西安 710049

陈林(1990-),助理教授，主要研究方向为高温防护涂层，电话：18392185352,E-mail:chenlinxjtu@xjtu.edu.cn

收稿日期: 2022-01-18

修回日期: 2022-02-21

录用日期: 2022-03-01

网络出版日期: 2023-12-15

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Preparation and High Temperature Erosion Resistance of Cr₃C₂ - NiCr Coating

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State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Received date: 2022-01-18

Revised date: 2022-02-21

Accepted date: 2022-03-01

Online published: 2023-12-15

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摘要

垃圾焚烧炉在服役时会面临严重的高温冲刷磨损问题，采用防护涂层是对其施加保护的一种有效方法。为了研究Cr₃C₂-NiCr涂层在垃圾焚烧炉中高温冲刷环境下的服役表现，采用超音速火焰喷涂技术制备了Cr₃C₂-NiCr涂层，分析了喷涂距离对涂层微观组织的影响，并考察了涂层的抗高温冲蚀磨损性能。结果表明：随着喷涂距离的增大，涂层表面未熔化的颗粒数量增多，孔隙率也随之提高，当喷涂距离为225 mm时涂层的熔化程度最好。高温冲蚀试验中，制备涂层时选择的喷涂距离增大，涂层的冲蚀率提高，其抗高温冲蚀性能下降；当冲蚀温度从450℃升至550℃时，涂层的抗高温冲蚀能力下降。

关键词： 超音速火焰喷涂; NiCr金属陶瓷涂层; 微观组织; 抗高温冲蚀性能

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罗靖川, 杨冠军, 陈林 . Cr₃C₂ - NiCr涂层的制备及其抗高温冲蚀磨损性能[J]. 材料保护, 2022 , 55(7) : 1 -7 . DOI: 10.16577/j.issn.1001-1560.2022.0177

Abstract

Waste incinerators are faced with a problem of sever high temperature erosion in service, and applying a protective coating is an effective method to protect them from erosion damage. To research the service performance of Cr₃C₂-NiCr coatings in the high temperature erosion environment in waste incinerator, Cr₃C₂-NiCr coatings were prepared using high velocity oxy-fuel spraying, the influence of spraying distance on coatings' microstructure was studied, and the high temperature erosion resistance of coatings was examined. Results indicated that with the increase of spraying distance, both the amount of unmelted particles on the coating surface and the porosity of coating increased. The coating had the highest proportion of melted particles when the spraying distance was 225 mm. In the high temperature erosion test, the erosion rate of coating increased and the high temperature erosion resistance decreased while the spraying distance increased. Besides, the high temperature erosion resistance of coating decreased when the temperature of erosion test increased from 450 ℃ to 550 ℃.

Key words： high velocity oxy-fuel spraying; NiCr cermet coating; microstructure; high temperature erosion resistance

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西安交通大学材料科学与工程学院 金属材料强度国家重点实验室，陕西 西安 710049

State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China

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Abstract

西安交通大学材料科学与工程学院金属材料强度国家重点实验室，陕西西安 710049