等离子喷涂镍基合金涂层及其性能研究
肖毅成1,2, 秦松1,2, 李勇1,2, 杨佳霖1,2, 周奥1,2, 周建桥1,2, 鞠霖1,2, 张著1,2, 刘东华1,2
1. 湖南省冶金材料研究院有限公司
2. 湖南省先进涂层工程技术研究中心
通信作者: 肖毅成 (2000-), 工程师, 主要研究方向为先进涂层技术, E-mail: 1170635448@qq.com
Study on Plasma-Sprayed Nickel-Based Alloy Coatings and Properties
XIAO Yicheng1,2, QIN Song1,2, LI Yong1,2, YANG Jialin1,2, ZHOU Ao1,2, ZHOU Jianqiao1,2, JU Lin1,2, ZHANG Zhu1,2, LIU Donghua1,2
1. Hunan Metallurgica Materials Research Institute Co., Ltd.
2. Hunan Advanced Coating Engineering Technology Research Center
Corresponding Author: XIAO Yicheng (2000-), Engineer, Research Focus: Advanced Coating Technology, E-mail: 1170635448@qq.com
文章历史: 收稿日期: 2026-04-26
摘 要
为了研究Ni60A涂层在特定场景下的应用潜力，降低Ni60A涂层的制造成本，采用大气等离子喷涂技术在低碳钢表面制备了Ni60A涂层，并借助金相显微镜、数码硬度计、扫描电镜、微机控制电子万能试验机研究了喷涂电流的变化（475～725 A）对涂层微观组织与力学性能的影响。结果表明：喷涂电流的变化对涂层微观结构与力学性能的影响较为明显。当喷涂电流过低时喷涂功率低，导致离子焰流温度降低，无法得到充分的熔化，撞击至基体表面的动能有限，无法完全铺展开，使涂层致密程度与性能变差；当涂层电流过高时，喷涂功率升高，离子焰流温度的温度增加，粒子撞击至基体表面的动能升高，粉末粒子来不及完全铺展或填充孔隙便被后续粒子覆盖，造成涂层沉积率升高但致密度与性能下降。当涂层电流为600 A时，制备出的涂层分布均匀，内部孔洞较少，涂层与基体之间拥有良好的结合，具有较高的致密程度与良好的力学性能，其硬度为623.30 HV0.3，结合强度为61.67 MPa。
Abstract
In order to investigate the application potential of Ni60A coatings in specific scenarios and to reduce their manufacturing cost, Ni60A coatings were deposited on low-carbon steel substrates by atmospheric plasma spraying (APS) in this work. The effects of varying spraying current (from 475 A to 725 A) on the microstructure and mechanical properties of the coatings were examined by means of optical microscopy, a digital hardness tester, scanning electron microscopy (SEM), and a computer-controlled electronic universal testing machine. The results indicated that the spraying current exerted a notable influence on the coating microstructure and mechanical properties. When the spraying current was too low, the spraying power decreased, leading to a reduction in the plasma jet temperature; as a consequence, the in-flight particles were not fully melted, and their kinetic energy upon impacting the substrate surface was insufficient for complete flattening and spreading, which deteriorated the coating densification and performance. When the spraying current was excessively high, the spraying power increased, raising the plasma jet temperature and the kinetic energy of the particles upon impact; however, the powder particles were covered by subsequent particles before they could fully spread or fill the pores, resulting in an increased deposition efficiency but reduced density and degraded mechanical properties. At a spraying current of 600 A, the prepared coating exhibited a uniform distribution, fewer internal pores, good bonding between the coating and the substrate, a high degree of densification, and satisfactory mechanical properties, with a microhardness of 623.30 HV0.3 and a bonding strength of 61.67 MPa.
关键词
等离子喷涂; 喷涂电流; Ni60A涂片; 力学性能
Keywords
atmospheric plasma spraying; spraying current; Ni60; mechanical properties
引用文本
肖毅成, 秦松, 李勇, 等. 等离子喷涂镍基合金涂层及其性能研究[J]. 表面工程与再制造, 2026, 26(4): 32-37. DOI:10.26935/j.issn.2097-5317.2026.0022.
XIAO Yicheng, QIN Song, LI Yong, et al. Study on Plasma-Sprayed Nickel-Based Alloy Coatings and Properties[J]. Surface Engineering & Remanufacturing, 2026, 26(4): 32-37. DOI:10.26935/j.issn.2097-5317.2026.0022.
中图分类号
TG174.4
基金项目
湖南省冶金材料研究院有限公司自主科技项目 (HNYCY2026-03)
实验研究
